Low temperature sintering and properties of lead-free (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)O_3 ceramics with Ba(Cu_0.5W_0.5)O_3 addition

摘要

The low-temperature sintering behavior of (Ba_(0.85)Ca_(0.15))(Zr_(0.10)Ti_(0.90))O_3 (BCZT) piezoelectric ceramics with Ba(Cu_(0.5)W_(0.5))O_3 (BCW) addition has been investigated. The addition of 0.1 wt% BCW promotes the sinterability of BCZT ceramics owing to the generation of a liquid phase, resulting in a reduction of sintering temperature from 1,540 to 1,350 ℃. The piezoelectric coefficient (d_(33)), and the electromechanical coupling factor (kp) of the BCZT - 0.1 wt%BCW specimen sintered at 1,350 ℃ were 555 pC/N and 55 %, respectively, while Curie temperature (T_c) increases from 85 to 95 ℃.