期刊
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
卷 144, 期 -, 页码 40-45出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.minpro.2015.09.006
关键词
Magnesite; Sintering; Microstructure; High temperature strength
资金
- Council of Scientific & Industrial Research, India under 12th Five year plan project [GLASSFIB-ESC0202]
Indian magnesite mineral has substantial amount of impurities like CaO, SiO2 & Fe2O3. During sintering at elevated temperature these impurities react to form low melting phases like monticellite (CMS), which can degrade the high temperature properties of magnesite. In the present study, ZrO2 was added to reduce the formation of low melting phase in order to improve the hot strength. Amount of additive was varied between 2 and 6 wt.% with respect to raw magnesite. It was observed that addition of ZrO2 reduces the formation of low melting CMS at higher temperature and improves the flexural strength at 1200 degrees C. Periclase grain shape also changed from rounded to subrounded in the presence of zirconia. (C) 2015 Elsevier B.V. All rights reserved.
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