Ni4Nb2O9 ceramics prepared by the reaction-sintering process

被引：10

作者：

Liou, Yi-Cheng ^{[1
]}

Tsai, Zong-Sian ^{[1
]}

Fung, Kuan-Zong ^{[2
]}

Liu, Chi-Yang ^{[2
]}

机构：

[1] Kun Shan Univ, Dept Elect Engn, Tainan 71003, Taiwan

[2] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 70101, Taiwan

来源：

CERAMICS INTERNATIONAL | 2010年 / 36卷 / 06期

关键词：

Ni4Nb2O9; Reaction-sintering process; MICROWAVE DIELECTRIC-PROPERTIES; LOW-TEMPERATURE SYNTHESIS; MG4NB2O9; CERAMICS; CRYSTAL-STRUCTURE; SYSTEM; FREQUENCY; BEHAVIOR; MG;

D O I：

10.1016/j.ceramint.2010.03.020

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：

Fabrication of Ni4Nb2O9 ceramics via a reaction-sintering process was investigated. A mixture of raw materials was sintered into ceramics by bypassing calcination and subsequent pulverization stages. Ni4Nb2O9 phase appeared at 1300 degrees C and increased with increasing soak time. Ni4Nb2O9 content was found >96% in 1350 degrees C/2 h sintering pellets. A density of 5.71 g/cm(3) was obtained for pellets sintered at 1350 degrees C for 2 h. This reaches 96.5% of the theoretical density. As the sintering temperature increased to 1350 degrees C, an abnormal grain growth occurred and grains >100 mu m could be found. epsilon(r) of 15.4-16.9 are found in pellets sintered at 1200-1300 degrees C. Q x f increased from 9380 GHz in pellets sintered at 1200 degrees C to 14,650 GHz in pellets sintered at 1250 degrees C. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1887 / 1892

页数：6

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