Sol-gel processing of lead-free (Na,K)NbO3 ferroelectric films

被引：69
作者：
Lai, Fengping [1 ]
Li, Jing-Feng [1 ]
机构：
[1] Tsinghua Univ, State Key Lab New Ceram & Fine Prod, Dept Mat Sci, Beijing 100084, Peoples R China
来源：
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2007年 / 42卷 / 03期
基金：
中国国家自然科学基金;
关键词：
sol-gel process; lead-free piezoelectric ceramic; ferroelectric; thin film; NaNbO3-KNbO3;
D O I：
10.1007/s10971-007-0741-9
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 sol-gel processing of lead-free (Na,K) NbO3 ferroelectric films was studied. Sodium ethoxide (NaOC2H5) and potassium ethoxide (KOC2H5) were prepared by reacting solid Na and K with ethanol (99.7%) in a solvent of 2-methoxyethanol. 0.5-mu m-thick (Na,K)NbO3 thin films with orthorhombic perovskite structure were obtained by pyrolyzing at 400 degrees C and annealing at 800-900 degrees C. The films had relatively dense and uniform microstructure with grain size of about 50 nm, whose ferroelectricity was proved by the P-E hysteresis loop measurement. It was found that excess K was effective to reduce the annealing temperature for the crystallization of sol-gel-derived (Na,K)NbO3 thin films.
引用
收藏
页码：287 / 292
页数：6
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