A study on the phase transition and characteristics of rare earth elements doped BaTiO3

被引：141

作者：

Jung, YS

Na, ES

Paik, U ^{[1
]}

Lee, J

Kim, J

机构：

[1] Hanyang Univ, Dept Ceram Engn, Seoul 133791, South Korea

[2] Samsung Electromech Co Ltd, Multichip Res Grp, Suwon 442743, Kyunggi Do, South Korea

来源：

MATERIALS RESEARCH BULLETIN | 2002年 / 37卷 / 09期

关键词：

electronic materials; multilayers; differential scanning calorimetry (DSC); X-ray diffraction; dielectric properties;

D O I：

10.1016/S0025-5408(02)00813-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Non-reducible dielectric composition satisfying X8R specifications (-55 to 150degreesC, +/-15%) for automotive applications was investigated in a BaTiO3-MgCO3-MnO2-rare earth elements (La, Pr, Gd, Tb, Dy, Ho, Er, Yb, Lu) system. In the cases of Er, Yb, Lu-substituted samples, a transition of the Curie point shifted to a higher temperature was observed. The peak shift toward higher temperatures indicated that the tetragonal phase became more stable at the high temperature. The ionic radius of rare earth elements was found to be an important factor in controlling the temperature dependency of the dielectric properties. Especially, smaller ionic radii of rare earth elements such as Yb and Lu were effective dopants to meet the X8R temperature-capacitance characteristics. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1633 / 1640

页数：8

共 13 条

[1] INFLUENCE OF CORE SHELL GRAINS ON THE INTERNAL-STRESS STATE AND PERMITTIVITY RESPONSE OF ZIRCONIA-MODIFIED BARIUM-TITANATE [J].