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Effect of Excess Magnesia on the Preparation of Cordierite Based on Waste Foundry Sand
Author(s) -
Xiang Ruofei,
Li Yuanbing,
Li Shujing,
Li Yawei,
Sang Shaobai
Publication year - 2015
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12509
Subject(s) - cordierite , materials science , foundry , sintering , crystallization , indentation hardness , metallurgy , casting , raw material , mineralogy , chemical engineering , microstructure , ceramic , organic chemistry , engineering , chemistry
Waste foundry sand collected from lost foam casting industry is a solid waste that contains Z r S i O 4 . For the purpose of re‐utilization, it is adopted to synthesize cordierite with the addition of M g O powders and fused silica by direct sintering, meanwhile the effect of various M g O mole ratios on the sintering behaviors is investigated using XRD , SEM , and mercury porosimetry. The lowest temperature corresponding to the formation of cordierite is 1150°C, and the increase of M g O mole ratio does not reduce the temperature for cordierite crystallization but increase the microhardness and thermal expansion coefficients.