Excellent sintering ability of Bi(Mn_2/3Sb_1/3)O₃-added (Bi_1/2K_1/2)TiO₃ lead-free piezoceramics with high density and low dielectric loss

Abstract

By adding 1.5 mol.% Bi(Mn 2/3 Sb 1/3)O 3 (BMS), (Bi 1/2 K 1/2)TiO 3 (BKT) ceramics show an excellent sintering ability in conventional oxide sintering process. In a wide temperature range from 10201050°C, the 0.985BKT 0.015BMS (BKMS) ceramics demonstrate a super-high relative density of 98% and low dielectric loss tan ¤ of 0.017. Even though the temperature reaches to 1060°C, BKMS ceramics maintain high relative density over 95% other than being collapsed as the pure BKT did. Besides, the BKMS ceramics sintered at 1020 to 1050°C present adequately high electrical properties. The enhanced sintering ability of BKMS ceramics is attributed to the increased viscosity of liquid induced by Sb 5+ solving in the liquid phase during sintering. The work provides a way to realize the densification of BKT ceramics.

Thermal Stability and Non-Linear Optical and Dielectric Properties of Lead-Free K0.5Bi0.5TiO3 Ceramics

“…However, KBT density may be underestimated and restrict the ferroelectric properties [40][41][42][43][44]55] due to the formation of impurity phases in ceramics sintering. Therefore, KBT manufacturing with the lowest possible impurity phase content is imperative [45][46][47][48][49]56].…”