Silicon carbide ceramic compositions for high temperature hot gas filters by mullite-zirconia bonding and preparing method of hot gas filters using this

摘要

PURPOSE: Mullite-zirconia combined silicon carbide ceramic compositions for high temperature gas filters and a method for preparing the high temperature gas filters are provided to increase the strength of the filters by mixing mullite, zirconia, and calcium carbonate with silicon carbide powder. CONSTITUTION: Mullite-zirconia combined silicon carbide ceramic compositions for high temperature gas filters include silicon carbide powder, mullite powder, calcium carbonate powder, and zirconia powder. A method for preparing the high temperature gas filters includes the following: An organic binder and a solvent are mixed with mullite-zirconia combined silicon carbide ceramic compositions to form a filter. The filter is dried and sintered. The organic binder is at least one selected from a group including methylcellulose, ethylcellulose, carboxymethylcellulose, and polyvinyl alcohol.