Porous silicon carbide ceramic material and preparation method thereof

The invention provides a porous silicon carbide ceramic material. The porous silicon carbide ceramic material is prepared from the following raw materials in parts by weight: 50-100 parts of silicon carbide powder, 10-35 parts of aluminum hydroxide powder, 1-8 parts of a sintering aid, 0.1-5 parts of a pore forming agent, 0.1-5 parts of a dispersing agent and 20-100 parts of deionized water, the sintering aid is modified bentonite. According to the porous silicon carbide ceramic material, the modified bentonite is adopted as a sintering aid, the sodium lignin sulfonate and the bentonite are in net connection through the sodium carboxymethyl cellulose, the bonding strength and the bonding efficiency of the sintering aid and the silicon carbide powder are improved, and the porosity and the mechanical performance of the ceramic material are improved after sintering. 本发明提供了一种多孔碳化硅陶瓷材料，该多孔碳化硅陶瓷由包括如下重量份的原料制成：碳化硅粉体50-100份，氢氧化铝粉体10-35份，烧结助剂1-8份，造孔剂0.1-5份，分散剂0.1-5份，去离子水20-100份；所述的烧结助剂为改性膨润土。本发明所述的多孔碳化硅陶瓷材料采用改性膨润土作为烧结助