Microstructure and suppressed thermal depolarisation behaviours of lead-free Na0.5Bi0.5TiO3:ZnO ferroelectric composite ceramics
作者： Ling Li , Mankang Zhu , Qiumei Wei , Zhihua Guo , Mupeng Zheng
DOI: 10.1080/17436753.2017.1374317
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摘要: ABSTRACTA 0–3 type 0.8Na0.5Bi0.5TiO3(BNT):0.2ZnO lead-free ferroelectric composite ceramic structure was prepared by a solid-state oxide route. The X-ray diffraction analysis and scanning electron microscopy observation indicate that ZnO grains were scattered in the matrix consisting of BNT to form (0–3) structure, third phase Zn2TiO4 formed due reaction ability nano-sized with NBT compositions. temperature-dependent electrical responses show dielectric anomaly at around 200°C inherited from itself suppressed as is composited, Pr specimen sintered 1000°C keeps almost unchanged poling temperature 175°C, while its retained piezoelectric strain d33 value maintains 77% initial exposed 125°C annealing. These results suggest thermal depolarisation introduction ZnO, even though exists.
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