Low-temperature sintering and microwave dielectric properties of (1-x)Mg4Nb2O9-xCaTiO3 ceramics

被引：16

作者：

Yao, Guo-guang ^{[1
,2
]}

Liu, Peng ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Coll Phys & Informat Technol, Xian 710062, Peoples R China

[2] Xian Univ Post & Telecommun, Dept Appl Math & Phys, Xian 710121, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2010年 / 405卷 / 02期

关键词：

Composite materials; Dielectric properties; Insulators; CRYSTAL-STRUCTURE; SYSTEM;

D O I：

10.1016/j.physb.2009.09.062

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The effect of V2O5 additive on the sinterability, microstructure and microwave dielectric properties of (1 - x)Mg4Nb2O9-xCaTiO(3) (0 <= x <= 0.7) ceramics was investigated. Two-phase system was confirmed by the X-ray diffraction patterns and Raman spectra analysis. The specimens with 1.7 wt% V2O5 addition can be well-sintered at the temperature as low as 1150 degrees C. As the x value increased from 0.2 to 0.7, the tau f of specimens can be promoted from - 44 to 134 ppm/degrees C. In particular, a new 0.5Mg(4)Nb(2)O(9)-0.5CaTiO(3) ceramics sintered at 1150 degrees C for 5h exhibited excellent microwave dielectric properties of epsilon(r)=20, Q x f=48000 GHz and tau(f)=-12ppm/degrees C. It is proposed as a candidate material for today's 3G application. (C) 2009 Published by Elsevier B.V.

引用

页码：547 / 551

页数：5

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