【作者】 赵明磊； 王春雷； 王矜奉； 陈洪存； 李明明；

【Author】 ZHAO Ming-lei;WANG Chun-lei;WANG Jin-feng;CHEN Hong-cun;LI Ming-ming Physics department of Shandong University,Jinan, 250100, China Physics department of Jinan University,Jinan, 250100, China

【机构】 山东大学物理系； 济南大学物理系；

【摘要】 系统研究了(Na_0.5Bi_0.5)TiO₃陶瓷的热滞现象、电滞回线和压电性能。实验结果表明,经过高压长时间极化的(Na_0.5Bi_0.5)TiO₃陶瓷具有较大的机电耦合系数k_t=40%、压电常数d₃₃≥45(10^-12C/N)和相对较低的谐振频率温度系数f_r-TC ≤180(10^-6/℃)。其中,施加高电压和延长极化时间对提高这种材料的压电常数d₃₃十分有效。更多还原

【Abstract】 Temperature hysteresis, D-E hysteresis and piezoelectric properties ot (Na_0.5Bi_0.5TiO₃ ceramic areinvestigaed.It is found that high poling field and long poling time are both effective to improve the piezoelectricconstant d₃₃ of this material.Although (Na_0.5Bi_0.5)TiO₃ ceramic has high coercive field, it is a potential lead-freepiezoelectric material with relatively high electromechanical coupling factor kt=40% and piezoelectric constant d₃₃≥45(10^-12C/N), along with relatively low temperature coefficient of resonance frequency fr-TC≤180(10^-6/℃).更多还原