Synthesis, crystal structure and low loss of Li3Mg2NbO6 ceramics by reaction sintering process

被引：27

作者：

Wang, Gang ^{[1
]}

Zhang, Dainan ^{[1
]}

Gan, Gongwen ^{[1
]}

Yang, Yan ^{[1
]}

Rao, Yiheng ^{[1
]}

Xu, Fang ^{[1
]}

Huang, Xin ^{[1
]}

Liao, Yulong ^{[1
]}

Li, Jie ^{[1
]}

Liu, Cheng ^{[1
]}

Jin, Lichuan ^{[1
]}

Zhang, Huaiwu ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Sichuan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2019年 / 45卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Reaction sintering process; Bond valence; Single orthorhombic phase; MICROWAVE DIELECTRIC-PROPERTIES; TEMPERATURE; BEHAVIOR; RESONATORS; PHASES;

D O I：

10.1016/j.ceramint.2019.06.230

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An investigation into an effective and simple process for the production of a low-cost material with high production efficiency has resulted in a significant impact on commercial production. In the present work, we synthesized the low loss Li3Mg2NbO6 ceramic using an effective and simple reaction sintering process. A single orthorhombic phase was corroborated by XRD and Rietveld refinement. The packing fraction and Nb-O bond valence were determined according to the Rietveld refinement results to explore the relationship between the structure and microwave dielectric performance. The Raman analysis indicated that the shift of the band near 772 cm(-1) assigned to the Mg-O bond vibration was consistent with the diversification of the cell volume. Furthermore, dense and homogeneous microstructures with large grain sizes (similar to 130 mu m) were obtained when sintered at 1350 degrees C. The relative density exerted an influence on the dielectric constant, while the packing fraction and grain size influenced the Q x f value of the Li3Mg2NbO6 ceramics. Moreover, the Nb-O bond valence dominated the tau(f) value of the Li3Mg2NbO6 ceramics. Excellent microwave dielectric characteristics for the samples sintered at 1350 degrees C: epsilon(r) = 14.5, Q x f = 116,000 (9.76 GHz) GHz and tau(f) = 24.5 ppm/degrees C were achieved by the reaction sintering process, exhibiting a potential for industrial production.

引用

页码：19766 / 19770

页数：5

共 34 条

[1] Sintering behavior and microwave dielectric characteristics of ZnTiNb2O8 ceramics achieved by reaction sintering of ZnO-TiO2-Nb2O5 nanosized powders [J].