Structure and dielectric properties of niobium-rich potassium lithium tantalate niobate single crystals

被引：3
|
作者：
Li, Jun [1 ,2 ]
Li, Yang [1 ,2 ]
Zhou, Zhongxiang [1 ]
Guo, Ruyan [2 ]
Bhalla, Amar S. [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：
X-ray methods; Dielectric properties; Perovskites; KNBO3-KTAO3; TRANSITIONS;
D O I：
10.1016/j.ceramint.2013.03.067
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 structure and lattice parameters of high quality niobium-rich potassium lithium tantalate niobate (K0.95Li0.05)(Ta1-xNbx)O-3 (x=0.44-0.66) single crystals were determined by the X-ray powder diffraction technique. Dielectric properties were studied in the temperature range from 20 to 500 K. The transition temperatures were determined, and the Curie temperatures adjusted between 330 K and 480 K through the suitable selection of Ta-to-Nb ratio. The degree of relaxation (gamma) has been estimated using the modified Curie Weiss law. The (K0.95Li0.05)(Ta1-xNbx)O-3 single crystals have also shown strong dc electric field dependent dielectric behavior, and high dielectric tunability (similar to 43%) for x=0.44. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：8537 / 8541
页数：5
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