Effects Of WO3 on the microstructure and optical transmittance of PLZT ferroelectric ceramics

被引：14
作者：
Favaretto, Robson
Garcia, Ducinei
Eiras, Jose Antonio
机构：
[1] Dept Mat Engn, Sao Carlos, SP, Brazil
[2] Dept Fis, Sao Carlos, SP, Brazil
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 13-15期
基金：
巴西圣保罗研究基金会;
关键词：
hot pressing; microstructure-final; dielectric properties; optical properties; PLZT;
D O I：
10.1016/j.jeurceramsoc.2007.02.172
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 influence of the WO3 addition as sintering aids on the structural, microstructural and optical properties of (Pb,La)(Zr,Ti)O-3-PLZT based ceramics was investigated. Ferroelectric (Pb0.9La0.1)(Zr0.65Ti0.35)(0.975) O-3 + xwt% WO3 (x = 0.0, 0.5, 1.5 and 2.0) ceramics were densified by oxygen assisted uniaxial hot pressing. From the XRD results it was found that the hot pressed samples displayed single pseudocubic perovskite phase. EDS analysis evidenced the presence Of WO3 rich phase at the grain boundaries. An inhibition of grain growth and an evolution from transgranular to intergranular fracture behavior was observed, as a consequence of the formation of a PbO-WO3 liquid phase, as the amount Of WO3 addition was increased. The optical transmittance in the visible and infrared range was decreased due to the presence of the liquid phase in grain boundaries, for WO3 content lower than 2.0 wt%. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4037 / 4040
页数：4
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