Sm2O3掺杂Bi2O3-ZnO-Nb2O5基陶瓷的结构与性能

Sm₂O₃掺杂Bi₂O₃-ZnO-Nb₂O₅基陶瓷的结构与性能

摘要: 研究了Sm₂O₃掺杂的Bi₂O₃-ZnO-Nb₂O₅(BZN)基陶瓷(Bi_1.5-xSmxZn_0.5)(Zn_0.5Nb_1.5)O₇(0≤x≤0.6,BSZN),的结构及介电性能。结果表明:纯BZN陶瓷的结构为立方焦绿石单相;当Sm₂O₃掺杂量较少(0<x≤0.5)时,样品的相结构仍然保持立方焦绿石单相;随着Sm₂O₃掺杂量的进一步增加(x≥0.6),样品出现其它相。同时,试样的介电性能随结构的变化而呈现有规律的变化。

Abstract: The structure and dielectric properties of Bi₂O₃-ZnO-Nb₂O₅ based ceramics doped by Sm₂O₃ （Bi_1.5-xSmxZn_0.5）（Zn_0.5Nb_1.5）O₇ were investigated. It shows that the crystal structure of the undoped （Bi_1.5Zn_0.5）（Zn_0.5Nb_1.5）O₇ samples is pure cubic pyrochlore. For the lower concentration of Sm₂O₃ （0≤ x≤ 0.5）, the crystal structure is still cubic pyrochlore. With the amount of Sm₂O₃（x≥ 0.6） increasing, the other phase such as Sm₃NbO₇ is formed in the crystal structure. The dielectric properties change regularly with the structure.