Effects of MnO on the microstructure and electrical properties of Ba0.85Ca0.15Ti0.90 Zr0.10O3 (BCTZ) ceramics were investigated. Its sintering temperature decreases, a phase boundary shifts to a higher temperature, and a denser microstructure is induced by introducing MnO. Double P-E loops were observed in BCTZ with x 0.30wt% MnO due to the involvement of more defects. Piezoelectric properties are degraded by doping MnO, but the temperature stability of piezoelectric properties is improved with a low dielectric loss of approximate to 0.63%. As a result, BCTZ ceramics with x = 0.15wt% MnO have optimum electrical properties: d(33) approximate to 382 pC/N, k(p) approximate to 44.5%, E-r approximate to 2611, and tan approximate to 0.63%.
机构:
Nagoya Inst Technol, Grad Sch Engn, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555, JapanNagoya Inst Technol, Grad Sch Engn, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555, Japan
机构:
Nagoya Inst Technol, Grad Sch Engn, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555, JapanNagoya Inst Technol, Grad Sch Engn, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555, Japan