Sintering time dependence of microwave dielectric properties and crystal structure in Y2BaZnO5 ceramic

被引：13

作者：

Yoshida, A ^{[1
]}

Ogawa, H ^{[1
]}

Kan, A ^{[1
]}

Kondo, T ^{[1
]}

机构：

[1] Meijo Univ, Fac Sci & Technol, Tempaku Ku, Nagoya, Aichi 4688502, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2005年 / 25卷 / 12期

关键词：

powders-solid state reaction; sintering; X-ray method; electron microscopy; dielectric property;

D O I：

10.1016/j.jeurceramsoc.2005.03.161

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 effect of sintering time on the microwave dielectric properties and crystal structure of the Y2BaZnO5 ceramic was investigated in this study. The Y2BaZnO5 ceramic was sintered at 1300 degrees C for 2-100h in air; the significant variations in the dielectric constant and the temperature coefficient of resonant frequency of the Y2BaZnO5 ceramic were not observed with the variations in the sintering time. Although the quality factor of the samples increased from 50,000 to 189,000 GHz with increasing the sintering times from 2 to 50h, a decrease in the quality factor was recognized when the sample was sintered for 100 h at the temperature of 1300 degrees C. By refining the site occupancy of Zn in terms of the Rietveld analysis, it was found that the vaporization of Zn in amounts was at least 0.05 mol in the case of the Y2BaZnO5 compound sintered for 100 h. Thus, the marked degradation of the quality factor of the sample sintered for 100 h is related to the vaporization of Zn, which depends on the variations in the sintering time. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：2897 / 2900

页数：4

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