Effect of TiO2 and CaTiO3 additives on the sintering behavior and microwave dielectric properties of Ca(Mg0.92Al0.08) (Si0.96Al0.04)2O6 ceramics

被引：4
作者：
Li, Denghao [1 ]
Wang, Humping [1 ]
Yang, Qinghua [1 ]
Lei, Ruoshan [1 ]
Ma, Hongping [2 ]
Xu, Shiqing [1 ]
机构：
[1] China Jiliang Univ, Coll Mat Sci & Engn, Hangzhou 310018, Zhejiang, Peoples R China
[2] Zhejiang Univ Sci & Technol, Sch Mech & Automot Engn, Hangzhou 310012, Zhejiang, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2014年 / 40卷 / 09期
关键词：
TiO2; Ca(Mg; Al)(Si; Al)(2)O-6; Microwave dielectric properties; CaTiO3; Low-permittivity ceramic; TEMPERATURE;
D O I：
10.1016/j.ceramint.2014.06.006
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：
Ca(Mg0.92Al0.08)(Si0.96Al0.04)(2)O-6 ceramics with different amounts of TiO2/CaTiO3 additions were prepared by the solid-state reaction method. The sintering behavior, microstructure and microwave dielectric properties of TiO2/CaTiO3-added ceramics were investigated. The control of the temperature coefficient of resonant frequency (tau(f)) could be achieved by varying the content of TiO2 or CaTiO3. Particularly, TiO2 reacted with the main ceramic phase of Ca(Mg,Al)(Si,Al)(2)O-6 and produced secondary phases of MgTi2O5 and CaTiSiO4O, which lowered the Q x f values of the ceramics. TiO2-added ceramics sintered at 1225 degrees C with 22 wt% TiO2 additions showed dielectric properties of epsilon(r) = 12.06, Q x f = 5940 GHz and tau(f) = 2.24 ppm/degrees C. Comparing with the TiO2-added ceramics, CaTiO3 just existed as a separate component, and the Ca(Mg0.92Al0.(08)) (Si0.96Al0.04)(2)O-6 ceramic sintered at 1250 degrees C with 10 wt% CaTiO3 additions showed a good combination of dielectric properties: epsilon(r) = 9.6, Q x f = 32,590 GHz and epsilon(f) = -1.53 ppm/degrees C. Crown Copyright (C) 2014 Published by Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：14185 / 14190
页数：6
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