本文選題：無鉛鐵電陶瓷 + 相變　； 參考：《壓電與聲光》2017年01期

【摘要】：傳統(tǒng)換能器材料——PZT95/5鐵電陶瓷中的鉛元素對環(huán)境污染大,且其電致應(yīng)變(S)和壓電系數(shù)(d33)較小,因此限制了換能器的輸出功率。該文從保護(hù)環(huán)境和優(yōu)化換能器性能的角度出發(fā),研制出位于準(zhǔn)同型相界處的無鉛鐵電陶瓷0.93Bi_(0.5)Na_(0.5)TiO_3-0.07BaTiO_3(BNT-7BT),測試了其晶體結(jié)構(gòu)和介電溫譜曲線,并得到了溫度對該陶瓷電滯回線及電致應(yīng)變曲線的影響。實(shí)驗(yàn)結(jié)果表明,鈣鈦礦結(jié)構(gòu)的無鉛鐵電陶瓷BNT-7BT在152℃處發(fā)生鐵電→反鐵電相變,且其具有較大的電致應(yīng)變量(室溫下S≈2.92‰)和較高的壓電系數(shù)(d33=152pC/N)。
[Abstract]:The traditional transducer material, PZT95 / 5 ferroelectric ceramic, has high environmental pollution, and its electrically induced strain (S) and piezoelectric coefficient (D33) are small, which limits the output power of the transducer. In order to protect the environment and optimize the performance of the transducer, a lead-free ferroelectric ceramic 0.93BiJ _ 0.5NaO _ (0.5) tio _ (3-0.07) BaTiO3BNT-7BTT has been developed at the quasi-homogenous phase boundary. The crystal structure and dielectric temperature spectra have been measured. The effect of temperature on the hysteresis loop and strain curve of the ceramic was obtained. The experimental results show that the perovskite-structure lead-free ferroelectric ceramics (BNT-7BT) have ferroelectric antiferroelectric phase transition at 152 鈩，

本文編號(hào)：1804424