Contrasting microwave dielectric properties of zircon-structured AEuV2O8 (A = Bi, La) ceramics
Contrasting microwave dielectric properties of zircon-structured AEuV2O8 (A = Bi, La) ceramics
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DOI：
10.1016/j.jeurceramsoc.2022.09.007
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发表时间：
2022-09
影响因子：
5.7
通讯作者：
Xiaowen Hu;Jinwu Chen;Jie Li;H. Xiang;Ying Tang;L. Fang
中科院分区：
文献类型：
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作者：
Xiaowen Hu;Jinwu Chen;Jie Li;H. Xiang;Ying Tang;L. Fang
在900 ° C和1375 ° C的最佳烧结温度下制备了两种锆英石结构陶瓷AEuV2O8（A = Bi，La）。BiEuV2O8的ε r = 28.7 ± 0.1，Q × f = 14，000 ± 300 GHz，τ f = 75.7 ± 2.0 ppm/° C; LaEuV2O8的ε r = 10.4 ± 0.1Q × f = 25，100 ± 300 GHz，τ f = − 40.7 ± 2.0 ppm/° C。在A位的振动效应是更占主导地位的微波介电性能比压缩的V5+在B位。BiEuV_2O_8的ε r比LaEuV_2O_8高，Q × f和τ ε比LaEuV_2O_8低，τ f比LaEuV_2O_8大。此外，它们的Q × f还与B1 g喇曼模的相对密度、键价和半高宽有关。
Two zircon-structured ceramics AEuV2O8(A = Bi, La) were prepared with optimal sintering temperatures of 900 °C and 1375 °C, respectively. They exhibited sharp contrast performances with mediumεr∼ 28.7 ± 0.1,Q × f∼ 14,000 ± 300 GHz, and large positiveτf∼ 75.7 ± 2.0 ppm/°C for BiEuV2O8, whereas lowεr∼ 10.4 ± 0.1Q × f∼ 25,100 ± 300 GHz, and negativeτf∼ − 40.7 ± 2.0 ppm/°C for LaEuV2O8. The rattling effect at the A-site was more dominant in determining microwave dielectric properties than that of compressed V5+at the B-site. It resulted in the higherεr, lowerQ × fandτε, and largerτfof BiEuV2O8than those of LaEuV2O8. Besides, theirQ × fwas related with the relative density, bond valence and FWHM of the B1 gRaman mode.