Effects of LiF on microwave dielectric properties of 0.25Ca0.8Sr0.2TiO3-0.75Li0.5Nd0.5TiO3 ceramics

被引：2
作者：
Liu, Fei [1 ]
Yuan, Changlai [2 ]
Liu, Xinyu [1 ,2 ]
Qu, Jing Jing [3 ]
机构：
[1] Cent S Univ, Coll Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[2] Guilin Univ Elect Technol, Coll Mat Sci & Engn, Guilin 541004, Peoples R China
[3] Guilin Univ Aerosp Technol, Dept Informat Engn, Guilin 541004, Peoples R China
来源：
BULLETIN OF MATERIALS SCIENCE | 2015年 / 38卷 / 05期
基金：
中国国家自然科学基金;
关键词：
0.25Ca(0.8)Sr(0.2)TiO(3)-0.75Li(0.5)Nd(0.5)TiO(3); microwave dielectric properties; microstructures; LiF; CRYSTAL-STRUCTURE; SYSTEM;
D O I：
10.1007/s12034-015-1003-z
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of LiF addition on sinterability, microstructure and microwave dielectric properties of 0.25Ca(0.8)Sr(0.2)TiO(3)-0.75Li(0.5)Nd(0.5)TiO(3) ceramics were investigated. The LiF addition enhanced the sintering temperature of 0.25Ca(0.8)Sr(0.2)TiO(3)-0.75Li(0.5)Nd(0.5)TiO(3) ceramics from 1200 to 1300 degrees C, because the LiF addition could compensate the evaporation of Li during the sintering process. It was found that the bulk density and dielectric constant (epsilon(r)) gradually decreased, the quality factor (Q(f)) greatly increased and the temperature coefficient of resonant frequency (tau(f)) shifted to a near-zero value with the increase in LiF addition. Obviously, excess Li addition could efficiently improve the microwave dielectric properties. In addition, 0.25Ca(0.8)Sr(0.2)TiO(3)-0.75Li(0.5)Nd(0.5)TiO(3) + 4.0 wt% LiF ceramics sintered at 1350 degrees C for 4 h exhibited good microwave dielectric properties of epsilon(r) similar to 123.4, Q(f) similar to 2209 GHz (at 2.43 GHz) and tau(f) similar to 12.3 ppm degrees C-1.
引用
收藏
页码：1223 / 1229
页数：7
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