【摘要】 采用固相反应的方法系统地研究了BZN稳定PZN基陶瓷的相结构与介电性能。随着BZN含量的增加,PZN-BZN陶瓷中钙钛矿相的稳定性增强,居里温度近似呈线性下降,室温介电常数和介质损耗随也显著降低,最小值分别为380和0.002。为获得100%钙钛矿结构的PZN基陶瓷所需BZN的最小用量为8mol%~10mol%,当BZN的mol%超过15mol%时,PZN基陶瓷中钙钛矿相所占的百分比不再受烧结工艺的影响,基本保持100%。1kHz时Pb0.9Ba0.1Zn1/3Nb2/3O3陶瓷的最大介电常数Kmax=8680,tgδ=0.02,相应的居里温度Tm为24℃。更多还原

【Abstract】 Phase structure and dielectric properties of bariumzinc niobate(BZN) stabilizinglead zinc niobate based(PZN) ceram-ics prepared by the solid state reaction were systematicallyinvestigatedin this work.With the addition of BZN,the stabilizationof perovskite phase of PZN-BZNceramics increase,but Curie temperature for different compositions PZN-BZNceramics decreaselinearly in the rough,roomdielectric constants and dielectric losses(1kHz) also decrease remarkly,the mini mumvalue is up to380 and 0.002,respectively.The mini mumamount of BZN modifier neededis 8 mol %~10 mol %for obtaining 100 %perovskitestructure PZN-BZNceramics.When BZNcontent in PZN-BZNceramics is more than 15 mol %,the percentage of the perovskitephase is not li mited by the conditions of sintering processing.Good dielectric properties were obtained for the composition of0.90PZN-0.10BZN: The maxi mumdielectric constant(εmax) and dielectric loss(tgδ) andis 8680 and 0.027,respectively.Curietemperature is 24℃,Correspondingly.更多还原