Mechanism of the piezoelectricity of langasite based on the crystal structures

被引：45

作者：

Iwataki, T

Ohsato, H

Tanaka, K

Morikoshi, H

Sato, J

Kawasaki, K

机构：

[1] Nagoya Inst Technol, Showa Ku, Nagoya, Aichi 4668555, Japan

[2] TDK Co, Mat Res Ctr, Chiba 2868588, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2001年 / 21卷 / 10-11期

关键词：

piezoelectric properties; SAW filter; X-ray methods;

D O I：

10.1016/S0955-2219(01)00029-2

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：

Langasite family crystals (R3Ga5SiO14, R = rare earth) are expected as the new piezoelectric material for SAW filter. La3Ga5SiO14 has the largest piezoelectric modulus in these crystals. It is reported that the piezoelectric properties of these crystals improved with the increase of the ionic radius of R. In this work, we clarified the crystal structures of three kinds of langsite family crystals (R = La, Pr and Nd) by X-ray diffraction analysis. We investigated the differences among these crystal structures and clarified the reason why the piezoelectric properties improved with the increase of the ionic radius of R on the basis of these structural differences. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1409 / 1412

页数：4