Yb2O3和Sm2O3复合掺杂对锆钛酸钡陶瓷介电性能的影响

摘要

以碳酸钡、二氧化锆、二氧化钛等为原料，以Sm2O3为掺杂剂和掺杂量为0.5mol% Y2O3的锆钛酸钡陶瓷材料为研究对象，采用传统固相法分别于1250℃、1280℃、1300℃、1330℃下制备了陶瓷样品，研究Sm2O3加入物对体系介电性能和微观形貌的影响。结果表明，Sm3+掺杂后的陶瓷样品主晶相不变，均为钙钛矿结构；掺杂能起到改善介电常数与介电损耗的作用，随着Sm2O3掺杂量的增加，陶瓷样品的介电常数最高至6623.49，而介电损耗最低至0.0145；掺杂还可以改变BZT陶瓷的介电性能，居里温度向室温方向移动，当Sm2O3掺杂量x=0.005 mol时，陶瓷样品的介电性能最好。%The ceramic samples were prepared respectively by the conventional solid phase method at the temperatures of 1250℃, 1280℃, 1300℃ and 1330℃, using BaCO3, ZrO2, TiO2, Yb2O3 and Sm2O3. The inlfuence of doping amount of Sm2O3 on the dielectric properties and morphology of the ceramic was investigated when there was 0.5 mol%Y2O3. The experimental results show that the main phase of ceramic samples doped with Sm3+ remains unchanged, all of perovskite structure. With the increase of the doping amount of Sm2O3, the dielectric constant of ceramic samples is up to 6623.49, while the lowest dielectric loss is up to 0.0145. Doping can also change the dielectric properties of BZT ceramics, making Curie temperature move to room temperature .When the doping amount of Sm2O3 is 0.005, the dielectric properties of ceramic samples is the best.