Low-temperature sintering and microwave dielectric properties of Mg4Nb2O9 ceramics

被引：7
|
作者：
Liu, P. [1 ]
Yao, G. G. [1 ]
Bian, X. B. [1 ]
Zhang, H. W. [2 ]
机构：
[1] Shaan Xi Normal Univ, Sch Phys & Informat Technol, Xian 710062, Peoples R China
[2] Sch Microelect & Solid State Elect, Chengdu 610054, Peoples R China
来源：
JOURNAL OF ELECTROCERAMICS | 2008年 / 21卷 / 1-4期
关键词：
Microwave dielectric ceramics; Low-temperature sintering; Mg4Nb2O9; V2O5; Li2CO3;
D O I：
10.1007/s10832-007-9114-6
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：
The effects of V2O5 and Li2CO3 on the sinterability and microwave dielectric properties of Mg4Nb2O9 (MN) ceramics were investigated. With addition of 1.5wt% V2O5, the dielectric constant (epsilon) and Q.f value of MN ceramics sintered at 1,000 degrees C are comparable to those of pure MN sintered at 1,400 degrees C. The good results are because of the enhancement of the density by liquid sintering at the lower temperatures. With the mixtures of V2O5 and Li2CO3, the sintering temperature of MN was further reduced to 925 degrees C at the expense of the quality factor (Q.f) value. Typically, epsilon of 13.7 and Q.f value of 78,000 GHz were obtained for the specimens with mixtures of 1.5wt% V2O5 and 1.5wt%, Li2CO3 and sintered at 925 degrees C for 5 h.
引用
收藏
页码：149 / 153
页数：5
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