Study on Microstructure and Properties of BTBY Piezoelectric Ceramics with High Curie Temperature

摘要

(1-x)(0.6BIT-0.4BT)-xBiYbO_3(BTBY) ceramics with high Curie temperature were prepared by the conventional processing. The effect of BiYbO_3 content on the microstructure and electrical properties was investigated. The results show that the main phase of BTBY ceramics is BIT-BT, and a new phase BaBi_4Ti_4O_(15) (BBT) appeared. The grain morphology of BTPY ceramics are platelike and the grain size was significantly increased with increasing content of BiYbO_3. Tc of all the BTBY samples are above 440 °C.