Pyroelectric properties of lead-free ferroelectric niobium-rich potassium lithium tantalate niobate single crystals

被引：5
作者：
Li, Jun [1 ,2 ]
Li, Yang [1 ,2 ]
Zhou, Zhongxiang [1 ]
Guo, Ruyan [2 ]
Bhalla, Amar [2 ]
机构：
[1] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China
[2] Univ Texas San Antonio, Dept Elect & Comp Engn, Multifunct Elect Mat & Device Res Lab, San Antonio, TX 78249 USA
来源：
CERAMICS INTERNATIONAL | 2013年 / 39卷 / 07期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
Dielectric properties; Electrical properties; Perovskites; DETECTORS; CERAMICS; DEVICES;
D O I：
10.1016/j.ceramint.2013.03.028
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 pyroelectric properties of niobium-rich potassium lithium tantalate niobate K0.95Li0.05Ta1-xNbxO3 (x=0.46, 0.51, 0.55, and 0.62) single crystals have been investigated. The pyroelectric coefficients (p(i)), the computed spontaneous polarizations (P-s) and the pyroelectric figures of merit (FOMs) have been determined. The typical values of p(i) (632 mu C/cm(2) K), P-s (13.3 mu C/cm(2)) and FOM (243 pm/V) are attractive, and can be compared to the classical pyroelectric materials. The transition temperatures also have been determined from dielectric and pyroelectric measurements. These good pyroelectric properties as well as the possibility to produce large-size and high-quality single crystals make this kind of single crystal very promising for infra-red detectors and other pyroelectric applications. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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收藏
页码：8517 / 8519
页数：3
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