STRUCTURE REFINEMENT OF MULLITE BY THE RIETVELD METHOD AND A NEW METHOD FOR ESTIMATION OF CHEMICAL-COMPOSITION

被引：131

作者：

BAN, T

OKADA, K

机构：

[1] Department of Inorganic Materials, Tokyo Institute of Technology, Tokyo

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 01期

关键词：

MULLITE; LATTICE; COMPOSITION; CRYSTALLOGRAPHY; X-RAY DIFFRACTION;

D O I：

10.1111/j.1151-2916.1992.tb05473.x

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 structure of mullite was refined by the Rietveld method, and a new method for the estimation of chemical composition of mullite was proposed. Mullites were synthesized by firing the starting materials prepared by sol-gel and spray pyrolysis methods at various temperatures. Linear correlations were recognized between the chemical composition of mullite analyzed with the Rietveld method and the lengths of a and b axes, but a small anomaly was found in the variation of the c axis. It was found to be caused by a difference in the c axis of pseudotetragonal mullite and that of orthorhombic mullite. A good correlation was found between the chemical composition of mullite and the intensity ratio of (I220/I111). This is a much more convenient method for estimating the chemical composition of mullite than Cameron's method, which uses a lattice constant.

引用

页码：227 / 230

页数：4

共 20 条

[1] ANGEL RJ, 1986, AM MINERAL, V71, P1476
[2] CAMERON WE, 1977, AM CERAM SOC BULL, V56, P1003
[3] HAMANO K, 1966, YOGYO KYOKAISHI, V74, P144
[4] HARIYA Y, 1969, AM MINERAL, V54, P1419
[5] HOFFMAN DW, 1984, J AM CERAM SOC, V67, P468, DOI 10.1111/j.1151-2916.1984.tb19636.x
[6] IZUMI F, 1985, J CRYSTALLOGR SOC JA, V27, P23
[7] KANZAKI S, 1985, J AM CERAM SOC, V68, pC6, DOI 10.1111/j.1151-2916.1985.tb15252.x
[8] LI DX, 1990, 43RD AM CER SOC PAC
[9] OKADA K, 1987, J AM CERAM SOC, V70, pC245, DOI 10.1111/j.1151-2916.1987.tb04888.x
[10] CHARACTERIZATION OF THE SPINEL PHASE FROM SIO2-AL2O3 XEROGELS AND THE FORMATION PROCESS OF MULLITE
OKADA, K
OTSUKA, N
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1986, 69 (09) : 652 - 656

← 1 2 →