Functional Ceramics

The focus of the Functional Ceramics research group is the experimental characterization of mechanical and electrical properties of novel perovskite materials, particularly the influence of external fields on the structural phase transformations and conductivity as well as temperature-dependent electromechanical behavior.

Perovskite-structured ceramics are commercially important oxides that are used in numerous actuation, sensing, and energy applications due to their wide-ranging functional material properties, such as ferroelectricity, ferromagnetism, superconductivity, colossal magnetoresistance, and ionic conductivity.

In order to realize such measurements, we have developed a number of unique experimental arrangements, which allow us to characterize the large and small signal electromechanical response of materials over a large temperature range (–150 to 800 °C) under large external mechanical and electrical fields.

Contact: Prof. Dr. Kyle G. Webber – kyle.g.webber@fau.de

Interested in becoming part of the Functional Ceramics Research Group? Please apply here.

Current Research Projects
The Influence of Mechanical Loads on the Functional Properties of Perovskite Oxides
–Influence of Structural Phase Transitions on the Mechanical Behavior of Lead-Free Potassium Sodium Niobate Piezoceramics
–Influence of Stress on Large Strain Behavior in Sustainable Lead-Free Actuator Materials
–Nonlinear Mechanical Properties of Perovskite Materials for Energy Applications
–Tailoring the Electromechanical Behavior of Lead-Free Composite Ferroelectrics – The Influence of Electrical Conductivity

 

Publications

2019

• Eckstein U., Detsch R., Khansur NH., Brehl M., Deisinger U., de Ligny D., Boccaccini AR., Webber K.:
  Bioactive glass coating using aerosol deposition
  In: Ceramics International (2019)
  ISSN: 0272-8842
  DOI: 10.1016/j.ceramint.2019.04.197
• Khansur NH., Eckstein U., Li Y., Hall DA., Kaschta J., Webber K.:
  Revealing the effects of aerosol deposition on the substrate-film interface using NaCl coating
  In: Journal of the American Ceramic Society (2019)
  ISSN: 0002-7820
  DOI: 10.1111/jace.16489
  URL: https://ceramics.onlinelibrary.wiley.com/doi/abs/10.1111/jace.16489
• Khansur NH., Eckstein U., Li Y., Hall DA., Kaschta J., Webber K.:
  Revealing the effects of aerosol deposition on the substrate‐film interface using NaCl coating
  In: Journal of the American Ceramic Society (2019)
  ISSN: 0002-7820
  DOI: 10.1111/jace.16489
  URL: https://ceramics.onlinelibrary.wiley.com/doi/full/10.1111/jace.16489
• Li Y., Liu Y., Öchsner PE., Isaia D., Zhang Y., Wang K., Webber K., Li JF., Rödel J.:
  Temperature dependent fracture toughness of KNN-based lead-free piezoelectric ceramics
  In: Acta Materialia 174 (2019), p. 369-378
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2019.05.060
• Martin A., Ursic H., Rojac T., Webber K.:
  Direct observation of the stress-induced domain structure in lead-free (Na1/2Bi1/2) TiO3-based ceramics
  In: Applied Physics Letters 114 (2019), Article No.: ARTN 052901
  ISSN: 0003-6951
  DOI: 10.1063/1.5084255
• Martin A., Ursic H., Rojac T., Webber K.:
  Direct observation of the stress-induced domain structure in lead-free (Na1/2Bi1/2) TiO3-based ceramics
  In: Applied Physics Letters 114 (2019), Article No.: 052901
  ISSN: 0003-6951
  DOI: 10.1063/1.5084255
• Novak N., Keil P., Froemling T., Schader F., Martin A., Webber K., Roedel J.:
  Influence of metal/semiconductor interface on attainable piezoelectric and energy harvesting properties of ZnO
  In: Acta Materialia 162 (2019), p. 277-283
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2018.10.008
• Wang S., Ayrikyan A., Zhang H., Webber K., Xu BX.:
  Phase-Field Study of Electromechanical Coupling in Lead-Free Relaxor/Ferroelectric-Layered Composites
  In: Advanced Electronic Materials 5 (2019)
  ISSN: 2199-160X
  DOI: 10.1002/aelm.201800710

2018

• Ayrikyan A., Prach O., Khansur NH., Keller S., Yasui S., Itoh M., Sakata O., Durst K., Webber K.:
  Investigation of residual stress in lead-free BNT-based ceramic/ceramic composites
  In: Acta Materialia 148 (2018), p. 432-441
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2018.02.014
• Froemling T., Steiner S., Ayrikyan A., Bremecker D., Duerrschnabel M., Molina-Luna L., Kleebe HJ., Hutter H., Webber K., Acosta M.:
  Designing properties of (Na1/2Bi: X)TiO3-based materials through A-site non-stoichiometry
  In: Journal of Materials Chemistry C 6 (2018), p. 738-744
  ISSN: 2050-7526
  DOI: 10.1039/c7tc03975a
• Geiger P., Khansur NH., Rieß K., Martin A., Hinterstein M., Webber K.:
  Stress-dependent crystal structure of lanthanum strontium cobalt ferrite by in situ synchrotron X-ray diffraction
  In: Journal of Applied Physics 123 (2018), Article No.: 075104
  ISSN: 1089-7550
  DOI: 10.1063/1.5017934
• Kaeswurm B., Schader F., Webber K.:
  Ferroelectric, Ferroelastic, Piezoelectric, and Dielectric Properties of Lead Zirconate Titanate from –150°C to 350°C
  In: Ceramics International 44 (2018), p. 2358-2363
  ISSN: 0272-8842
  DOI: 10.1016/j.ceramint.2017.10.204
• Kaeswurm B., Segouin V., Webber K.:
  The Anhysteretic Polarisation of Ferroelectrics
  In: Journal of Physics D: Applied Physics 51 (2018), Article No.: 075305
  ISSN: 0022-3727
  DOI: 10.1088/1361-6463/aaa698
• Khansur NH., Eckstein U., Benker L., Deisinger U., Merle B., Webber K.:
  Room temperature deposition of functional ceramic films on low-cost metal substrate
  In: Ceramics International 44 (2018), p. 16295-16301
  ISSN: 0272-8842
  DOI: 10.1016/j.ceramint.2018.06.027
• Khansur NH., Eckstein U., Rieß K., Martin A., Drnec J., Drnec J., Deisinger U., Webber K.:
  Synchrotron x-ray microdiffraction study of residual stresses in BaTiO3 films deposited at room temperature by aerosol deposition
  In: Scripta Materialia 157 (2018), p. 86-89
  ISSN: 1359-6462
  DOI: 10.1016/j.scriptamat.2018.07.045
• Koruza J., Bell AJ., Frömling T., Webber K., Wang K., Rödel J.:
  Requirements for the transfer of lead-free piezoceramics into application
  In: Journal of Materiomics 4 (2018), p. 13-26
  ISSN: 2352-8478
  DOI: 10.1016/j.jmat.2018.02.001
• Martin A., Khansur NH., Rieß K., Webber K.:
  Frequency dependence of the relaxor-to-ferroelectric transition under applied electrical and mechanical fields
  In: Journal of the European Ceramic Society (2018)
  ISSN: 0955-2219
  DOI: 10.1016/j.jeurceramsoc.2018.12.026
• Martin A., Khansur NH., Webber K.:
  Electric field-induced changes in the ferroelastic behavior of (Na1/2Bi1/2)TiO3-BaTiO3
  In: Journal of the European Ceramic Society 38 (2018), p. 4623-4630
  ISSN: 0955-2219
  DOI: 10.1016/j.jeurceramsoc.2018.06.017
• Martin A., Khansur NH., Webber K.:
  Electric field-induced changes in the ferroelastic behavior of (Na1/2Bi1/2)TiO3-BaTiO3
  In: Journal of the European Ceramic Society 38 (2018), p. 4623-4630
  ISSN: 0955-2219
  DOI: 10.1016/j.jeurceramsoc.2018.06.017
• Menge G., Lorenz H., Fu Z., Eichhorn F., Schader F., Webber K., Fey T., Greil P., Travitzky N.:
  Paper-Derived Ferroelectric Ceramics: A Feasibility Study
  In: Advanced Engineering Materials (2018)
  ISSN: 1438-1656
  DOI: 10.1002/adem.201800052
• Schader F., Isaia D., Weber M., Aulbach E., Webber K.:
  High-temperature stress-dependent piezoelectric and dielectric coefficient of soft Pb(Zr,Ti)O-3
  In: Journal of Materials Science 53 (2018), p. 3296-3308
  ISSN: 0022-2461
  DOI: 10.1007/s10853-017-1817-8
• Segouin V., Kaeswurm B., Webber K., Daniel L.:
  Temperature-dependent anhysteretic behavior of co-doped PZT
  In: Journal of Applied Physics (2018), Article No.: 104103
  ISSN: 1089-7550
  DOI: 10.1063/1.5040556

2017

• Ayrikyan A., Kastner A., Khansur NH., Yasui S., Itoh M., Webber K.:
  Lead-Free Multilayer Piezoceramic Composites: Effect of Cosintering on Electromechanical Properties
  In: IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control 64 (2017), p. 1127-1134
  ISSN: 0885-3010
  DOI: 10.1109/TUFFC.2017.2701882
• Ayrikyan A., Weyland F., Steiner S., Duerrschnabel M., Molina-Luna L., Koruza J., Webber K.:
  Multilayer lead-free piezoceramic composites: Influence of co-firing on microstructure and electromechanical behavior
  In: Journal of the American Ceramic Society (2017)
  ISSN: 1551-2916
  DOI: 10.1111/jace.14887
• Chen D., Ayrikyan A., Webber K., Kamlah M.:
  Time-dependent electromechanical response of 0.93(Na1/2Bi1/2) TiO3-0.07BaTiO(3) lead-free piezoceramic under constant electric field
  In: Journal of Applied Physics 121 (2017)
  ISSN: 0021-8979
  DOI: 10.1063/1.4978704
• Geiger PT., Clemens O., Khansur NH., Hinterstein M., Sahini MG., Grande T., Tung P., Daniels JE., Webber K.:
  Nonlinear mechanical behaviour of Ba0.5Sr0.5Co0.8Fe0.2O3 (- delta) and in situ stress dependent synchrotron X-ray diffraction study
  In: Solid State Ionics 300 (2017), p. 106-113
  ISSN: 0167-2738
  DOI: 10.1016/j.ssi.2016.11.027
• Hagiwara M., Ehara Y., Novak N., Khansur NH., Ayrikyan A., Webber K., Fujihara S.:
  Relaxor-ferroelectric crossover in (B i1/2 K1/2)Ti O3: Origin of the spontaneous phase transition and the effect of an applied external field
  In: Physical Review B 96 (2017), Article No.: 014103
  ISSN: 2469-9950
  DOI: 10.1103/PhysRevB.96.014103
• Kaeswurm B., Barcza A., Vögler M., Geiger P., Katter M., Gutfleisch O., Cohen L.:
  Behaviour of the Young's modulus at the magnetocaloric transition in La(Fe,Co,Si)13
  In: Journal of Alloys and Compounds 697 (2017), p. 427-433
  ISSN: 0925-8388
  DOI: 10.1016/j.jallcom.2016.11.360
• Khansur NH., Glaum J., Clemens O., Zhang H., Daniels JE., Webber K.:
  Uniaxial compressive stress and temperature dependent mechanical behavior of (1-x)BiFeO3-xBaTiO3 lead-free piezoelectric ceramics
  In: Ceramics International 43 (2017), p. 9092-9098
  ISSN: 0272-8842
  DOI: 10.1016/j.ceramint.2017.04.055
• Martin A., Kakimoto KI., Hatano K., Doshida Y., Webber K.:
  Ferroelastic behavior across the orthorhombic-to-tetragonal phase transition region of NKN-based lead-free ferroelectrics
  In: Journal of Applied Physics 122 (2017)
  ISSN: 0021-8979
  DOI: 10.1063/1.4989759
• Schader FH., Khakpash N., Rossetti GA., Webber K.:
  Phase transitions in BaTiO3 under uniaxial compressive stress: Experiments and phenomenological analysis
  In: Journal of Applied Physics 121 (2017)
  ISSN: 0021-8979
  DOI: 10.1063/1.4976060
• Schader FH., Rossetti GA., Luo J., Webber K.:
  Piezoelectric and ferroelectric properties of < 001 > c Pb(In1/2Nb1/2) O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals under combined thermal and mechanical loading
  In: Acta Materialia 126 (2017), p. 174-181
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2016.12.051
• Voegler M., Daniels JE., Webber K., Roedel J.:
  Absence of toughening behavior in 0.94(Na1/2Bi1/2)TiO3-0.06BaTiO(3) relaxor ceramic
  In: Scripta Materialia 136 (2017), p. 115-119
  ISSN: 1359-6462
  DOI: 10.1016/j.scriptamat.2017.04.023
• Wang K., Yao FZ., Koruza J., Cheng LQ., Schader FH., Zhang MH., Roedel J., Li JF., Webber K.:
  Electromechanical properties of CaZrO3 modified (K,Na)NbO3-based lead-free piezoceramics under uniaxial stress conditions
  In: Journal of the American Ceramic Society 100 (2017), p. 2116-2122
  ISSN: 0002-7820
  DOI: 10.1111/jace.14661
• Webber K., Voegler M., Khansur NH., Kaeswurm B., Daniels JE., Schader F.:
  Review of the mechanical and fracture behavior of perovskite lead-free ferroelectrics for actuator applications
  In: Smart Materials and Structures 26 (2017), Article No.: 063001
  ISSN: 1361-665X
  DOI: 10.1088/1361-665X/aa590c

2016

• Ehara Y., Novak N., Ayrikyan A., Geiger P., Webber K.:
  Phase transformation induced by electric field and mechanical stress in Mn-doped (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 ceramics
  In: Journal of Applied Physics 120 (2016), Article No.: 174103
  ISSN: 0021-8979
  DOI: 10.1063/1.4966614
• Huan Y., Wang X., Koruza J., Wang K., Webber K., Hao Y., Li L.:
  Inverted electro-mechanical behaviour induced by the irreversible domain configuration transformation in (K,Na)NbO3-based ceramics
  In: Scientific Reports 6 (2016)
  ISSN: 2045-2322
  DOI: 10.1038/srep22053
• Liu X., Wegener CM., Polster S., Jank M., Roosen A., Frey L.:
  Materials Integration for Printed Zinc Oxide Thin-Film Transistors: Engineering of a Fully-Printed Semiconductor/Contact Scheme
  In: Journal of Display Technology 12 (2016)
  ISSN: 1551-319X
  DOI: 10.1109/JDT.2015.2445378
• Patterson EA., Major M., Donner W., Durst K., Webber K., Rödel J.:
  Temperature-Dependent Deformation and Dislocation Density in SrTiO3 (001) Single Crystals
  In: Journal of the American Ceramic Society (2016)
  ISSN: 1551-2916
  DOI: 10.1111/jace.14352
• Schader FH., Wang Z., Hinterstein M., Daniels JE., Webber K.:
  Stress-modulated relaxor-to-ferroelectric transition in lead-free (Na1/2Bi1/2) TiO3-BaTiO3 ferroelectrics
  In: Physical Review B 93 (2016)
  ISSN: 2469-9950
  DOI: 10.1103/PhysRevB.93.134111
• Wakily H., Koruza J., Ayrikyan A., Webber K.:
  Enhanced Electromechanical properties of ferroelectric Bi1/2Na1/2TiO3 -7BaTiO3/relaxorBi1/2Na1/2TiO3 -25SrTiO3composites
  2016 Joint IEEE International Symposium on the Applications of Ferroelectrics, European Conference on Application of Polar Dielectrics, and Piezoelectric Force Microscopy Workshop, ISAF/ECAPD/PFM 2016
  DOI: 10.1109/ISAF.2016.7578072
• Wefring ET., Schader FH., Webber K., Einarsrud MA., Grande T.:
  Electrical conductivity and ferroelastic properties of Ti-substituted solid solutions (1-x) BiFeO3 - x Bi0.5K0.5TiO3
  In: Journal of the European Ceramic Society 36 (2016), p. 497-506
  ISSN: 0955-2219
  DOI: 10.1016/j.jeurceramsoc.2015.09.044
• Yao FZ., Wang K., Jo W., Webber K., Comyn TP., Ding JX., Xu B., Cheng LQ., Zheng MP., Hou YD., Li JF.:
  Diffused Phase Transition Boosts Thermal Stability of High-Performance Lead-Free Piezoelectrics
  In: Advanced Functional Materials 26 (2016), p. 1217-1224
  ISSN: 1616-301X
  DOI: 10.1002/adfm.201504256

2015

• Acosta M., Schmitt LA., Molina-Luna L., Scherrer MC., Brilz M., Webber K., Deluca M., Kleebe HJ., Rödel J., Donner W.:
  Core–Shell Lead–Free Piezoelectric Ceramics: Current Status and Advanced Characterization of the Bi1/2Na1/2TiO3–SrTiO3 System
  In: Journal of the American Ceramic Society 98 (2015), p. 3405-3422
  ISSN: 1551-2916
  DOI: 10.1111/jace.13853
• Ayrikyan A., Rojas V., Molina-Luna L., Acosta M., Koruza J., Webber K.:
  Enhancing Electromechanical Properties of Lead-Free Ferroelectrics With Bilayer Ceramic/Ceramic Composites
  In: IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control 62 (2015), p. 997-1006
  ISSN: 0885-3010
  DOI: 10.1109/TUFFC.2014.006673
• Christmann J., Mueller R., Webber K., Isaia D., Schader FH., Kipfstuhl S., Freitag J., Humbert A.:
  Measurement of the fracture toughness of polycrystalline bubbly ice from an Antarctic ice core
  In: Earth System Science Data 7 (2015), p. 87-92
  ISSN: 1866-3508
  DOI: 10.5194/essd-7-87-2015
• Daniel L., Hall DA., Koruza J., Webber K., King A., Withers PJ.:
  Revisiting the blocking force test on ferroelectric ceramics using high energy x-ray diffraction
  In: Journal of Applied Physics 117 (2015)
  ISSN: 0021-8979
  DOI: 10.1063/1.4918928
• Deluca M., Picht G., Hoffmann MJ., Rechtenbach A., Toepfer J., Schader FH., Webber K.:
  Chemical and structural effects on the high-temperature mechanical behavior of (1-x)(Na1/2Bi1/2)TiO3-xBaTiO(3) ceramics
  In: Journal of Applied Physics 117 (2015)
  ISSN: 0021-8979
  DOI: 10.1063/1.4916784
• Ehara Y., Novak N., Yasui S., Itoh M., Webber K.:
  Electric-field-temperature phase diagram of Mn-doped Bi-0.5(Na0.9K0.1)(0.5)TiO3 ceramics
  In: Applied Physics Letters 107 (2015), Article No.: 262903
  ISSN: 0003-6951
  DOI: 10.1063/1.4938759
• Humburg HI., Acosta M., Jo W., Webber K., Roedel J.:
  Stress-dependent electromechanical properties of doped (Ba1-xCax)(ZryTi1-y)O-3
  In: Journal of the European Ceramic Society 35 (2015), p. 1209-1217
  ISSN: 0955-2219
  DOI: 10.1016/j.jeurceramsoc.2014.10.016
• Khansur NH., Kawashima H., Wada S., Hudspeth JM., Daniels J.:
  Enhanced extrinsic domain switching strain in core-shell structured BaTiO3-KNbO3 ceramics
  In: Acta Materialia 98 (2015), p. 182-189
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2015.07.034
• Khansur NH., Rojac T., Damjanovic D., Reinhard C., Webber K., Kimpton JA., Daniels JE., Khansur NH.:
  Electric-Field-Induced Domain Switching and Domain Texture Relaxations in Bulk Bismuth Ferrite
  In: Journal of the American Ceramic Society 98 (2015), p. 3884-3890
  ISSN: 0002-7820
  DOI: 10.1111/jace.13839
• Koruza J., Franzbach DJ., Schader FH., Rojas V., Webber K.:
  Enhancing the operational range of piezoelectric actuators by uniaxial compressive preloading
  In: Journal of Physics D-Applied Physics 48 (2015)
  ISSN: 0022-3727
  DOI: 10.1088/0022-3727/48/21/215302
• Morozov M., Einarsrud MA., Tolchard JR., Geiger P., Webber K., Damjanovic D., Grande T.:
  In-situ structural investigations of ferroelasticity in soft and hard rhombohedral and tetragonal PZT
  In: Journal of Applied Physics 118 (2015), p. 164104
  ISSN: 0021-8979
  DOI: 10.1063/1.4934615
• Rödel J., Webber K., Dittmer R., Jo W., Kimura M., Damjanovic D.:
  Transferring lead-free piezoelectric ceramics into application
  In: Journal of the European Ceramic Society 35 (2015), p. 1659-1681
  ISSN: 0955-2219
  DOI: 10.1016/j.jeurceramsoc.2014.12.013
• Schader FH., Morozov M., Wefring E., Grande T., Webber K.:
  Mechanical stability of piezoelectric properties in ferroelectric perovskites
  In: Journal of Applied Physics 117 (2015), p. 194101
  ISSN: 0021-8979
  DOI: 10.1063/1.4919815
• Voegler M., Acosta M., Brandt DRJ., Molina-Luna L., Webber K.:
  Temperature-dependent R-curve behavior of the lead-free ferroelectric 0.615Ba(Zr0.2Ti0.8)O-3-0.385(Ba0.7Ca0.3)TiO3 ceramic
  In: Engineering Fracture Mechanics 144 (2015), p. 68-77
  ISSN: 0013-7944
  DOI: 10.1016/j.engfracmech.2015.06.069
• Wang R., Wang K., Yao F., Li JF., Schader FH., Webber K., Jo W., Roedel J.:
  Temperature Stability of Lead-Free Niobate Piezoceramics with Engineered Morphotropic Phase Boundary
  In: Journal of the American Ceramic Society 98 (2015), p. 2177-2182
  ISSN: 0002-7820
  DOI: 10.1111/jace.13604
• Zhang H., Groh C., Zhang Q., Jo W., Webber K., Rödel J.:
  Large Strain in Relaxor/Ferroelectric Composite Lead-Free Piezoceramics
  In: Advanced Electronic Materials 1 (2015)
  ISSN: 2199-160X
  DOI: 10.1002/aelm.201500018

2014

• Brandt DR., Acosta M., Koruza J., Webber K.:
  Mechanical constitutive behavior and exceptional blocking force of lead-free BZT-xBCT piezoceramics
  In: Journal of Applied Physics 115 (2014)
  ISSN: 0021-8979
  DOI: 10.1063/1.4879395
• Daniel L., Hall DA., Webber K., King A., Withers PJ.:
  Identification of crystalline elastic anisotropy in PZT ceramics from in-situ blocking stress measurements
  In: Journal of Applied Physics 115 (2014)
  ISSN: 0021-8979
  DOI: 10.1063/1.4874222
• Dittmer R., Jo W., Webber K., Jones JL., Rödel J.:
  Local structure change evidenced by temperature-dependent elastic measurements: Case study on Bi1/2Na1/2TiO3-based lead-free relaxor piezoceramics
  In: Journal of Applied Physics 115 (2014)
  ISSN: 0021-8979
  DOI: 10.1063/1.4866092
• Ehmke MC., Schader FH., Webber K., Roedel J., Blendell JE., Bowman KJ.:
  Stress, temperature and electric field effects in the lead-free (Ba,Ca)(Ti,Zr)O-3 piezoelectric system
  In: Acta Materialia 78 (2014), p. 37-45
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2014.06.005
• Franzbach DJ., Seo YH., Studer AJ., Zhang Y., Glaum J., Daniels JE., Koruza J., Bencan A., Malic B., Webber K.:
  Electric-field-induced phase transitions in co-doped Pb(Zr1-xTix)O-3 at the morphotropic phase boundary
  In: Science and Technology of Advanced Materials 15 (2014)
  ISSN: 1468-6996
  DOI: 10.1088/1468-6996/15/1/015010
• Groh C., Franzbach DJ., Jo W., Webber K., Kling J., Schmitt LA., Kleebe HJ., Jeong S., Lee JS., Rödel J.:
  Relaxor/Ferroelectric Composites: A Solution in the Quest for Practically Viable Lead-Free Incipient Piezoceramics
  In: Advanced Functional Materials 24 (2014), p. 356-362
  ISSN: 1616-301X
  DOI: 10.1002/adfm.201302102
• Khansur NH., Groh C., Jo W., Reinhard C., Kimpton JA., Webber K., Daniels JE., Khansur NH.:
  Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach
  In: Journal of Applied Physics 115 (2014)
  ISSN: 0021-8979
  DOI: 10.1063/1.4869786
• Seo YH., Koruza J., Bencan A., Malic B., Rödel J., Webber K.:
  Simultaneous Enhancement of Fracture Toughness and Unipolar Strain in Pb(Zr,Ti)O-3-ZrO2 Composites Through Composition Adjustment
  In: Journal of the American Ceramic Society 97 (2014), p. 1582-1588
  ISSN: 0002-7820
  DOI: 10.1111/jace.12929
• Seuß S., Lehmann M., Boccaccini AR.:
  Alternating current electrophoretic deposition of antibacterial bioactive Glass-Chitosan composite coatings
  In: International Journal of Molecular Sciences 15 (2014), p. 12231-12242
  ISSN: 1422-0067
  DOI: 10.3390/ijms150712231
• Talai A., Gmeiner B., Wegener CM., Roosen A., Kölpin A., Steinhäußer F., Deisinger U., Bittner A., Schmid U., Weigel R.:
  Electromagnetic analysis of conductor track surface roughnesses from 1 GHz to 110 GHz
  International Conference on Electromagnetics in Advanced Applications (ICEAA) (Palm Beach, 3. August 2014 - 8. August 2014)
  In: Proceedings - 2014 International Conference on Electromagnetics in Advanced Applications, ICEAA 2014, Institute of Electrical and Electronics Engineers Inc., 2014
  DOI: 10.1109/ICEAA.2014.6903887
  URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6903887
• Tan X., Young S., Seo YH., Zhang J., Hong W., Webber K.:
  Transformation toughening in an antiferroelectric ceramic
  In: Acta Materialia 62 (2014), p. 114-121
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2013.09.038
• Trefalt G., Bencan A., Kamplet M., Malic B., Seo Y., Webber K.:
  Evaluation of the homogeneity in Pb(Zr,Ti)O-3-zirconia composites prepared by the hetero-agglomeration of precursors using the Voronoi-diagram approach
  In: Journal of the European Ceramic Society 34 (2014), p. 669-675
  ISSN: 0955-2219
  DOI: 10.1016/j.jeurceramsoc.2013.09.014
• Wang Z., Webber K., Hudspeth JM., Hinterstein M., Daniels JE.:
  Electric-field-induced paraelectric to ferroelectric phase transformation in prototypical polycrystalline BaTiO3
  In: Applied Physics Letters 105 (2014)
  ISSN: 0003-6951
  DOI: 10.1063/1.4898573
• Webber K., Franzbach DJ., Koruza J.:
  Determination of the True Operational Range of a Piezoelectric Actuator
  In: Journal of the American Ceramic Society 97 (2014), p. 2842-2849
  ISSN: 0002-7820
  DOI: 10.1111/jace.13024
• Zhang H., Jo W., Wang K., Webber K.:
  Compositional dependence of dielectric and ferroelectric properties in BiFeO3-BaTiO3 solid solutions
  In: Ceramics International 40 (2014), p. 4759-4765
  ISSN: 0272-8842
  DOI: 10.1016/j.ceramint.2013.09.020

2013

• Daniels JE., Picht G., Kimber S., Webber K.:
  Mechanical double loop behavior in BaTiO3: Stress induced paraelastic to ferroelastic phase transformation
  In: Applied Physics Letters 103 (2013)
  ISSN: 0003-6951
  DOI: 10.1063/1.4821446
• Dittmer R., Webber K., Aulbach E., Jo W., Tan X., Rödel J.:
  Electric-field-induced polarization and strain in 0.94(Bi1/2Na1/2)TiO3-0.06BaTiO(3) under uniaxial stress
  In: Acta Materialia 61 (2013), p. 1350-1358
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2012.11.012
• Dittmer R., Webber K., Aulbach E., Jo W., Tan X., Rödel J.:
  Optimal working regime of lead-zirconate-titanate for actuation applications
  In: Sensors and Actuators A-Physical 189 (2013), p. 187-194
  ISSN: 0924-4247
  DOI: 10.1016/j.sna.2012.09.015
• Kölpin N., Wegener CM., Teuber E., Polster S., Frey L., Roosen A.:
  Conceptional design of nano-particulate ITO inks for inkjet printing of electron devices
  In: Journal of Materials Science 48 (2013), p. 1623-1631
  ISSN: 0022-2461
  DOI: 10.1007/s10853-012-6919-8
• Rödel J., Seo YH., Bencan A., Malic B., Kosec M., Webber K.:
  R-curves. in transformation toughened lead zirconate titanate
  In: Engineering Fracture Mechanics 100 (2013), p. 86-91
  ISSN: 0013-7944
  DOI: 10.1016/j.engfracmech.2012.06.023
• Salje EKH., Carpenter MA., Nataf GF., Picht G., Webber K., Weerasinghe J., Lisenkov S., Bellaiche L.:
  Elastic excitations in BaTiO3 single crystals and ceramics: Mobile domain boundaries and polar nanoregions observed by resonant ultrasonic spectroscopy
  In: Physical Review B 87 (2013)
  ISSN: 1098-0121
  DOI: 10.1103/PhysRevB.87.014106
• Schader FH., Aulbach E., Webber K., Rossetti GA.:
  Influence of uniaxial stress on the ferroelectric-to-paraelectric phase change in barium titanate
  In: Journal of Applied Physics 113 (2013)
  ISSN: 0021-8979
  DOI: 10.1063/1.4799581
• Seo YH., Franzbach DJ., Koruza J., Bencan A., Malic B., Kosec M., Jones JL., Webber K.:
  Nonlinear stress-strain behavior and stress-induced phase transitions in soft Pb(Zr1-xTix)O-3 at the morphotropic phase boundary
  In: Physical Review B 87 (2013)
  ISSN: 1098-0121
  DOI: 10.1103/PhysRevB.87.094116
• Seo YH., Voegler M., Isaia D., Aulbach E., Roedel J., Webber K.:
  Temperature-dependent R-curve behavior of Pb(Zr1-xTix)O-3
  In: Acta Materialia 61 (2013), p. 6418-6427
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2013.07.020

2012

• Bencan A., Malic B., Drnovsek S., Tellier J., Rojac T., Pavlic J., Kosec M., Webber K., Roedel J., Damjanovic D.:
  Structure and the Electrical Properties of Pb(Zr,Ti)O-3 - Zirconia Composites
  In: Journal of the American Ceramic Society 95 (2012), p. 651-657
  ISSN: 0002-7820
  DOI: 10.1111/j.1551-2916.2011.04803.x
• Dittmer R., Aulbach E., Jo W., Webber K., Rödel J.:
  Large blocking force in Bi1/2Na1/2TiO3-based lead-free piezoceramics
  In: Scripta Materialia 67 (2012), p. 100-103
  ISSN: 1359-6462
  DOI: 10.1016/j.scriptamat.2012.03.031
• Franzbach DJ., Gu YJ., Chen LQ., Webber K.:
  Electric field-induced tetragonal to orthorhombic phase transitions in [110](c)-oriented BaTiO3 single crystals
  In: Applied Physics Letters 101 (2012)
  ISSN: 0003-6951
  DOI: 10.1063/1.4769368
• Leist T., Broetz J., Seo YH., Cheng S., Webber K.:
  Crack growth resistance behavior of lanthanum doped bismuth ferrite-lead titanate: Effect of tetragonality and mixed phase crystal structures
  In: Engineering Fracture Mechanics 96 (2012), p. 267-275
  ISSN: 0013-7944
  DOI: 10.1016/j.engfracmech.2012.08.008
• Picht G., Webber K., Zhang Y., Kungl H., Damjanovic D., Hoffmann MJ.:
  Critical mechanical and electrical transition behavior of BaTiO3: The observation of mechanical double loop behavior
  In: Journal of Applied Physics 112 (2012)
  ISSN: 0021-8979
  DOI: 10.1063/1.4767059
• Seo YH., Webber K., Bencan A., Koruza J., Malic B., Kosec M., Rödel J.:
  Deconvolving Ferroelastic and Phase Transformation Toughening in Pb(Zr1-xTix)O-3 and Pb1-yLay(Zr1-xTix)O-3
  In: Journal of the American Ceramic Society 95 (2012), p. 3713-3715
  ISSN: 0002-7820
  DOI: 10.1111/jace.12007
• Sluka T., Webber K., Colla E., Damjanovic D.:
  Phase field simulations of ferroelastic toughening: The influence of phase boundaries and domain structures
  In: Acta Materialia 60 (2012), p. 5172-5181
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2012.06.023

2011

• Franzbach DJ., Xu BX., Mueller R., Webber K.:
  The effects of polarization dynamics and domain switching energies on field induced phase transformations of perovskite ferroelectrics
  In: Applied Physics Letters 99 (2011)
  ISSN: 0003-6951
  DOI: 10.1063/1.3644957
• Leist T., Webber K., Jo W., Granzow T., Aulbach E., Suffner J., Roedel J.:
  Domain switching energies: Mechanical versus electrical loading in La-doped bismuth ferrite-lead titanate
  In: Journal of Applied Physics 109 (2011)
  ISSN: 0021-8979
  DOI: 10.1063/1.3555599
• Peukert W., Knieke C., Vozdecky P., Roosen A.:
  Advanced processes for better materials-tape casting from nanoparticles
  In: Chemie Ingenieur Technik 83 (2011), p. 535-544
  ISSN: 0009-286X
  DOI: 10.1002/cite.201000138
• Seo YH., Bencan A., Koruza J., Malic B., Kosec M., Webber K.:
  Compositional Dependence of R-curve Behavior in Soft Pb(Zr1-xTix)O-3 Ceramics
  In: Journal of the American Ceramic Society 94 (2011), p. 4419-4425
  ISSN: 0002-7820
  DOI: 10.1111/j.1551-2916.2011.04889.x
• Tan X., Ma C., Frederick J., Beckman S., Webber K.:
  The Antiferroelectric Ferroelectric Phase Transition in Lead-Containing and Lead-Free Perovskite Ceramics
  In: Journal of the American Ceramic Society 94 (2011), p. 4091-4107
  ISSN: 0002-7820
  DOI: 10.1111/j.1551-2916.2011.04917.x
• Webber K., Seo YH., Lee HY., Aulbach E., Jo W., Rödel J.:
  R-Curve Behavior of Pb(Mg1/3Nb2/3)O-3-29 mol% PbTiO3 Single Crystals: The Effect of Crystallographic Orientation and Grain Structure
  In: Journal of the American Ceramic Society 94 (2011), p. 2728-2730
  ISSN: 0002-7820
  DOI: 10.1111/j.1551-2916.2011.04677.x

2010

• Leist T., Webber K., Jo W., Aulbach E., Roedel J., Prewitt AD., Jones JL., Schmidlin J., Hubbard CR.:
  Stress-induced structural changes in La-doped BiFeO3-PbTiO3 high-temperature piezoceramics
  In: Acta Materialia 58 (2010), p. 5962-5971
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2010.07.012
• Marsilius M., Webber K., Aulbach E., Granzow T.:
  Comparison of the Temperature-Dependent Ferroelastic Behavior of Hard and Soft Lead Zirconate Titanate Ceramics
  In: Journal of the American Ceramic Society 93 (2010), p. 2850-2856
  ISSN: 0002-7820
  DOI: 10.1111/j.1551-2916.2010.03801.x
• Webber K., Aulbach E., Roedel J.:
  High temperature blocking force measurements of soft lead zirconate titanate
  In: Journal of Physics D-Applied Physics 43 (2010)
  ISSN: 0022-3727
  DOI: 10.1088/0022-3727/43/36/365401
• Webber K., Zhang Y., Jo W., Daniels JE., Roedel J.:
  High temperature stress-induced "double loop-like" phase transitions in Bi-based perovskites
  In: Journal of Applied Physics 108 (2010)
  ISSN: 0021-8979
  DOI: 10.1063/1.3428373
• Yoon MS., Khansur NH., Ur SC.:
  The effect of pre-milling/pre-synthesis process and excess Ba on the microstructure and dielectric/piezoelectric properties of nano-sized 0.94[(Bi0.5Na0.5)TiO3]-0.06[Ba(1+x)TiO3]
  In: Ceramics International 36 (2010), p. 1265-1275
  ISSN: 0272-8842
  DOI: 10.1016/j.ceramint.2010.01.011

2009

• Schilling A., Byrne D., Catalan G., Webber K., Genenko YA., Wu GS., Scott JF., Gregg JM.:
  Domains in Ferroelectric Nanodots
  In: Nano Letters 9 (2009), p. 3359-3364
  ISSN: 1530-6984
  DOI: 10.1021/nl901661a
• Webber K., Aulbach E., Key T., Marsilius M., Granzow T., Roedel J.:
  Temperature-dependent ferroelastic switching of soft lead zirconate titanate
  In: Acta Materialia 57 (2009), p. 4614-4623
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2009.06.037
• Yoon MS., Khansur NH., Choi BK., Lee YG., Ur SC.:
  The effect of nano-sized BNBT on microstructure and dielectric/piezoelectric properties
  In: Ceramics International 35 (2009), p. 3027-3036
  ISSN: 0272-8842
  DOI: 10.1016/j.ceramint.2009.04.016

2008

• Webber K., Robinson HC., Rossetti GA., Lynch CS.:
  A distributed step-like switching model of the continuous field-driven phase transformations observed in PMN-xPT relaxor ferroelectric single crystals
  In: Acta Materialia 56 (2008), p. 2744-2749
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2008.02.006
• Webber K., Zuo R., Lynch CS.:
  Ceramic and single-crystal (1-x)PMN-xPT constitutive behavior under combined stress and electric field loading
  In: Acta Materialia 56 (2008), p. 1219-1227
  ISSN: 1359-6454
  DOI: 10.1016/j.actamat.2007.11.025

2007

• Bathelt R., Buchhauser D., Gärditz C., Paetzold R., Wellmann P.:
  Light extraction from OLEDs for lighting applications through light scattering
  In: Organic Electronics 8 (2007), p. 293-299
  ISSN: 1566-1199
  DOI: 10.1016/j.orgel.2006.11.003

2006

• Kemethmüller S., Roosen A., Götz-Neunhoeffer F., Neubauer J.:
  Quantitative analysis of crystalline and amorphous phases in glass-ceramic composites like LTCC by the rietveld method
  In: Journal of the American Ceramic Society 89 (2006), p. 2632-2637
  ISSN: 0002-7820
  DOI: 10.1111/j.1551-2916.2006.01113.x
• Webber K., Hopkinson DP., Lynch CS.:
  Application of a classical lamination theory model to the design of piezoelectric composite unimorph actuators
  In: Journal of Intelligent Material Systems and Structures 17 (2006), p. 29-34
  ISSN: 1045-389X
  DOI: 10.1177/1045389X06056059