@article{1f3c44064fd14a2da7eaad6bb29cdc06,
title = "High temperature creep-mediated functionality in polycrystalline barium titanate",
abstract = "Dislocations in oxides can be described as charged line defects and means for one-dimensional doping, which can tune electrical and thermal properties. Furthermore, theoretically it was shown that dislocations can pin ferroelectric domain walls. Broader application of this concept hinges on the development of a methodology to avail this approach to polycrystalline ceramics. To this end, we use different creep mechanisms as a method to introduce multidimensional defects and quantify structural changes. A deformation map for fine-grained barium titanate is provided and the influences of the defects and creep regimes are correlated in this first study to modifications of electrical conductivity, dielectric, ferroelectric, and piezoelectric properties. A plastic deformation of 1.29% resulted in an increase in the Curie temperature by 5°C and a decrease in electromechanical strain by 30%, pointing toward electromechanical hardening by dislocations.",
keywords = "barium titanate, creep, dislocations, ferroelectricity/ferroelectric materials, piezoelectric materials/properties",
author = "Pengrong Ren and Marion H{\"o}fling and Jurij Koruza and Stefan Lauterbach and Xijie Jiang and Till Fr{\"o}mling and Khatua, {Dipak Kumar} and Christian Dietz and Lukas Porz and Rajeev Ranjan and Kleebe, {Hans Joachim} and J{\"u}rgen R{\"o}del",
note = "Funding Information: The authors are indebted to the Deutsche Forschungsgemeinschaft for funding this work under No. 398795637. PR thanks the support of National Natural Science Foundation (51972265) and Key Research and Development Program (Program No. 2019KW-025) of Shaanxi province of China. PR also thanks Lalitha KV for providing BaTiO3 powders. Funding Information: The authors are indebted to the Deutsche Forschungsgemeinschaft for funding this work under No. 398795637. PR thanks the support of National Natural Science Foundation (51972265) and Key Research and Development Program (Program No. 2019KW‐025) of Shaanxi province of China. PR also thanks Lalitha KV for providing BaTiO 3 powders. Publisher Copyright: {\textcopyright} 2019 The Authors. Journal of the American Ceramic Society published by Wiley Periodicals, Inc. on behalf of American Ceramic Society (ACERS)",
year = "2020",
month = mar,
day = "1",
doi = "10.1111/jace.16881",
language = "English",
volume = "103",
pages = "1891--1902",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "3",
}