Diffusion processes and structurization in microwave sintering of BaTiO3-SrTiO3 and Al2O3-Cr2O3 powder systems with complete miscibility

被引：4
作者：
Get'man, O. I. [1 ]
Panichkina, V. V. [1 ]
Radchenko, P. Ya. [1 ]
Skorokhod, V. V. [1 ]
Andreeva, M. G. [1 ]
Eremeev, A. G. [2 ]
Kholoptsev, V. V. [2 ]
机构：
[1] Natl Acad Sci Ukraine, Inst Problems Mat Sci, Kiev, Ukraine
[2] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603600, Russia
来源：
POWDER METALLURGY AND METAL CERAMICS | 2009年 / 48卷 / 5-6期
关键词：
microwave heating; sintering; oxide system; microstructure; IONIC-CRYSTALS; BACO3; FIELD; TIO2;
D O I：
10.1007/s11106-009-9132-9
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 paper examines the compaction and structurization of equimolar BaTiO3-SrTiO3 and Al2O3-Cr2O3 powder mixtures with complete miscibility and monophase Al2O3 and Cr2O3 powders under microwave heating (24 and 30 GHz) (MWH) and conventional heating (CH). A gyrotron system is used for MWH and electric furnaces for CH. The samples are prepared by sintering of ultrafine powder mixtures at 1000-1300A degrees C (MWH) and 1700A degrees C (CH). Mercury porometry is used to determine the mean pore size and specific surface area of the samples. The Barus-Bechgold method is employed to find the maximum pore contraction. A quantitative microscopic analysis of the samples is carried out. The content of solid solution is determined using x-ray analysis. The volume and local shrinkage is calculated. Relationships between the local and volume shrinkage, pore structure parameters, and amounts of solid solutions for different heating conditions are shown. The results reveal different diffusion processes in sintering of powder systems with complete miscibility of components under MWH and CH.
引用
收藏
页码：279 / 289
页数：11
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