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

[11] FORMATION REACTION OF MULLITE FROM SIO2-AL2O3 XEROGELS
OKADA, K
HOSHI, Y
OTSUKA, N
[J]. JOURNAL OF MATERIALS SCIENCE LETTERS, 1986, 5 (12) : 1316 - 1318
[12] OKADA K, 1990, CERAM TRANS, V6, P375
[13] OKADA K, 1988, SCI CERAM, V14, P497
[14] OKADA K, UNPUB
[15] OSSAKA J, 1961, NATURE, V19, P1000
[16] A PROFILE REFINEMENT METHOD FOR NUCLEAR AND MAGNETIC STRUCTURES
RIETVELD, HM
[J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1969, 2 : 65 - &
[17] SAALFELD H, 1981, NEUES JB MINER MONAT, P145
[18] STRUCTURE OF MULLITE, 2AL2O3.SIO2, AND RELATIONSHIP WITH STRUCTURES OF SILLIMANITE AND ANDALUSITE
SADANAGA, R
TAKEUCHI, Y
TOKONAMI, M
[J]. ACTA CRYSTALLOGRAPHICA, 1962, 15 (JAN10): : 65 - &
[19] SCHNEIDER H, 1988, J AM CERAM SOC, V71, pC162, DOI 10.1111/j.1151-2916.1988.tb05042.x
[20] SCHULLER KJH, 1976, 1975 P INT CLAY C ME, P233

← 1 2 →