Method for making porous acicular mullite bodies

Details Method for making porous acicular mullite bodies Method for making porous acicular mullite bodies

C - Chemistry, Metallurgy

04

B

C04B 35/185 (2006.01) C04B 38/00 (2006.01) C04B 38/06 (2006.01)

Patent

CA 2728295

Highly porous acicular mullite bodies are prepared. A green body containing mullite precursors and a porogen is formed using a wet method. The green body is heated to sequentially remove any binder, the porogen and calcine it. The calcined body is mullitized. The process formed a calcined body that has excellent strength and can be handled easily. The mullitized body has very high porosity, small pores and has excellent fracture strength.

Cette invention concerne la préparation de corps de mullite aciculaire extrêmement poreux. Un corps vert contenant des précurseurs de mullite et un porogène est formé par un procédé humide. Le corps vert est chauffé pour éliminer par séquence tout liant, le porogène, et pour le calciner. Le corps calciné est mullitisé. Le procédé forme un corps calciné ayant une excellente résistance et pouvant être facilement manipulé. Le corps mullitisé a une porosité très forte, des pores de petite taille et une excellente résistance à la fracture.

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