TY - JOUR
T1 - Fabrication of [100]-oriented bismuth sodium titanate ceramics with small grain size and high density for piezoelectric materials
AU - Hu, Dengwei
AU - Mori, Kotaro
AU - Kong, Xingang
AU - Shinagawa, Kazunari
AU - Wada, Satoshi
AU - Feng, Qi
N1 - Funding Information:
This work was supported in part by Grants-in-Aid for Scientific Research (B) (No. 23350101 ) from Japan Society for the Promotion of Science . This work was also supported in part by the National Science Foundation of China (No. 21005003 ), Natural Science Basic Research Plan in Shaanxi Province of China (No. 2013JQ6012 ), and China Postdoctoral Science Foundation (No. 2013M542314 ).
PY - 2014/5
Y1 - 2014/5
N2 - A layered titanate H1.07Ti1.73O4·nH2O (HTO) with a plate-like particle morphology was used as a template for the fabrication of [100]-oriented bismuth sodium titanate (Na0.5Bi0.5TiO3, or BNT) ceramics by a reactive-templated grain growth (RTGG) method. The oriented BNT ceramic with a high degree of orientation (95%), high density (98%), and small grain size (2μm) was fabricated for the first time by the RTGG method using a HTO-TiO2-Bi2O3-Na2CO3 reaction system. The oriented BNT ceramic is formed by a topotactic transformation reaction of plate-like HTO template particles to plate-like BNT mesocrystal particles, and then epitaxial crystal growth of BNT on the BNT mesocrystal particles. The epitaxial crystal growth reaction is affected by TiO2/HTO mole ratio, chemical component of the starting material, and calcination temperature program. The fabricated oriented BNT ceramic shows a higher d33* value than the non-oriented BNT ceramic, suggesting the promising application to high performance Pb-free piezoelectric materials.
AB - A layered titanate H1.07Ti1.73O4·nH2O (HTO) with a plate-like particle morphology was used as a template for the fabrication of [100]-oriented bismuth sodium titanate (Na0.5Bi0.5TiO3, or BNT) ceramics by a reactive-templated grain growth (RTGG) method. The oriented BNT ceramic with a high degree of orientation (95%), high density (98%), and small grain size (2μm) was fabricated for the first time by the RTGG method using a HTO-TiO2-Bi2O3-Na2CO3 reaction system. The oriented BNT ceramic is formed by a topotactic transformation reaction of plate-like HTO template particles to plate-like BNT mesocrystal particles, and then epitaxial crystal growth of BNT on the BNT mesocrystal particles. The epitaxial crystal growth reaction is affected by TiO2/HTO mole ratio, chemical component of the starting material, and calcination temperature program. The fabricated oriented BNT ceramic shows a higher d33* value than the non-oriented BNT ceramic, suggesting the promising application to high performance Pb-free piezoelectric materials.
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U2 - 10.1016/j.jeurceramsoc.2013.11.031
DO - 10.1016/j.jeurceramsoc.2013.11.031
M3 - Article
AN - SCOPUS:84892482042
VL - 34
SP - 1169
EP - 1180
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 5
ER -