Wholesaler and Windely Used of Sunrise Refractory Zircon Mullite Brick

Zhengzhou Sunrise Refractories Co., Ltd. is a company specializing in the production and processing of high alumina bricks, clay bricks, silicon bricks, magnesium bricks, low porosity bricks, thermal insulation bricks, castables, thermal insulation materials, ZS series, AZS series and other products. Scientific quality management system.

 

Sunrise Refractories Group has found that by introducing ZrO2 into A12O3-SiO2 series bricks to improve the structure of mullite, it can improve the chemical resistance, thermal shock resistance and reduce the expansion coefficient of mullite. This kind of ZrO2 containing Mullite bricks, commonly referred to as zirconium mullite bricks, are generally made by electrofusion and can also be produced by sintering. Sintered zircon mullite brick is a special refractory made of industrial alumina and zircon concentrates as raw materials, and zirconia is introduced into the mullite matrix through a reaction sintering process.

Introducing zirconia into mullite bricks and using phase transformation to toughen zirconia can greatly improve the high temperature mechanical properties of mullite materials. Zirconium oxide can promote the sintering of mullite materials. The addition of ZrO2 can accelerate the densification and sintering process of ZTM materials due to the generation of low-melting materials and the formation of vacancies. When the mass fraction of ZrO2 is 30%, the relative theoretical density of the green body fired at 1530 ° C is 98%, the strength is 378MPa, and the toughness is 4.3MPa · m1 / 2.

 

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