Fabrication and characterization of Li1+x-yNb1-x-3yTix+4yO3 substrates using aqueous tape casting process

被引：23
作者：
Li, Shaochun [1 ]
Zhang, Qiong [1 ]
Yang, Hui [1 ]
Zou, Dong [1 ]
机构：
[1] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2009年 / 35卷 / 01期
关键词：
Tape casting; Mechanical properties; Substrates; Li1+x-yNb1-x-3yTix+4yO3; MICROWAVE DIELECTRIC-PROPERTIES; BARIUM-TITANATE TAPES; MLCC APPLICATIONS; DIFFERENT BINDERS; SOLID-SOLUTIONS; ALUMINA; SUSPENSIONS; WATER; TEMPERATURE; CERAMICS;
D O I：
10.1016/j.ceramint.2007.12.003
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：
An aqueous system for tape casting Li1+x-yNb1-x-3yTix+4yO3 (LNT) ceramics was developed using poly(vinyl alcohol) (PVA) binder, ethylene alcohol (EG) plasticizer and ammonium salt of polycarboxylate (PCA-NH4) dispersant. The zeta potential measurement showed that the isoelectric point of the LNT particles moved slightly toward more acid region after the dispersant absorbed on the particles, while the zeta potential increased significantly. The theological test indicated that the ceramic slurry exhibited a typical pseudoplastic behavior without thixotropy. The effect of solid loading on the properties of the green tapes was investigated. The increase in the solid loading increased the tensile strength and the green density of the tapes. TGA analysis indicated that the organic additives in the green tapes can be completely removed by heat treatment at 600 degrees C. SEM micrographs showed that the microstructure of the green and sintered tapes was homogeneous. Crown Copyright (C) 2008 Published by Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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收藏
页码：421 / 426
页数：6
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