摘要
测量了各样品在1kHz、10kHz、100kHz频率下从室温至500℃的介电温谱,表明材料为弛豫铁电体,Ba2+的掺入使其弛豫特性有所降低。当x≥0.10时,材料在低温下具有正常铁电体的特征,高温下具有弛豫铁电体的特征。两个介电反常峰的存在表明在此温度区间材料发生了两次相变。
The temperature dependence of dielectric constant between room temperature and 500℃ un- der 1kHz,10kHz,100kHz frequency conditions were measured, it is found that the ceramics are relax- or ferroelectric. The relaxor characteristics are decreased by the substitution of Ba2＋. The ceramics exhibit normal ferroelectric properties at low temperature and relaxation properties at high tempera- ture with the composition of x≥0.10. It can be concluded that there are two phase transitions take place in the heating process by the phenomenon of two abnormal dielectric peaks.
出处
《山东陶瓷》
CAS
2012年第4期13-16,共4页
Shandong Ceramics
