发泡-淀粉固结法制备多孔碳化硅陶瓷  

Preparationof Porous Silicon Carbide Material By Foaming-Starch Consolidation

作　　者：杨彬[1] 王玮[1] 徐磊[1] 许国成[1] 杨凤磊[1] 

机构地区：[1]中国海洋大学材料科学与工程研究院,青岛266100

出　　处：《现代技术陶瓷》2009年第1期3-5,11,共4页Advanced Ceramics

基　　金：山东省科技攻关项目2006GG2207006;教育部留学回国科研启动基金

摘　　要：利用表面活性剂发泡,结合淀粉固结成型工艺,Al2O3-Y2O3为助烧剂的条件下,低温烧结制备了SiC多孔陶瓷,并对其气孔率、气孔形貌、强度等性能进行了研究。实验发现,制得的多孔材料中含有大、中、微三种大小的气孔;浆料的固相含量是影响材料密度和强度的主要因素,当固相含量为60%～72%时多孔陶瓷的相对密度为17%～36%,抗压强度为5～19MPa。Porous carbide silicon was prepared at a low temperature with the help of Al2O3-Y2O3 additives, based on generation of foams from the slurry and the subsequent stabilization of the structure by starch consolidation. By studying its porosity, mierostructure and strength, we found that the materials had a trimodal pores structure and the solid loading of the slurry was the which influenced the density and strength most. When the total solid loading was varied from 60% to 72.0 wt% , the relative density was 17% - 36% and the compressive resistance was 5 - 19MPa.

关 键 词：碳化硅 多孔陶瓷 发泡法 淀粉固结成型 气孔形貌 

分 类 号：TQ174.758[化学工程—陶瓷工业] TU41[化学工程—硅酸盐工业]