2015年1月9日星期五

Synthetic mullite introduction

Mullite (Mullite) is compound in atmospheric Al2O3-SiO2 two series in the only stable, chemical formula 3Al2O3 – 2SiO2, the theory of composition of Al2O3 71.8%, SiO2 28.2%. Mullite is a refractory brickmineral name, because of the moire Island Natural Minerals first discovered on the west coast of Scotland (Mull) and the name. Natural mullite mineral is very small, Lin County of China’s Wuan County in Hebei province and Henan province has been found, but so far the world has yet no industrial value of the deposit. Mullite artificial synthetic stone commonly used sintering method or electric melting method. Synthesis of mullite in 1926 and the first with electric melting method, in 1928 the successful development of sintering method. Currently the world’s electric melting mullite consumed 10000~20000 tons, 500000~600000 tons of sintered mullite. Synthesis of mullite is a high-quality refractory raw material; it has the expansion uniformity, thermal shock stability, excellent high load softening point, high temperature creep value characteristics of small, high hardness, resistance to chemical corrosion and good.

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