烧结温度对SiC/莫来石复相多孔陶瓷的影响  

Influences of Sintering Temperature on the Porous SiC/Mullite Ceramics

作　　者：陈茂开[1] 万隆[1] 刘小磐[1] 胡伟达[1] 王俊沙[1] 翟浩冲[1] 

机构地区：[1]湖南大学材料科学与工程学院,长沙410082

出　　处：《材料导报》2012年第20期119-122,共4页Materials Reports

基　　金：长沙市科技计划项目(K1109117-11)

摘　　要：以高岭土、SiC粉末、Al2O3粉末为主要原料,采用添加造孔剂法制备了SiC/莫来石复相多孔陶瓷,探讨了烧结温度对多孔陶瓷的气孔率、体积密度、抗折强度等的影响。分别采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)表征了样品的物相组成与断面形貌。结果表明,以淀粉为造孔剂,在1350℃下保温2h制备的样品综合性能最佳,其孔隙率为31.40%,抗折强度达到42.50MPa。Porous SiC/mullite ceramics were prepared by adding pore-forming material method with kaolin clay, SiC powder and AL2o3 powder as raw materials. The effects of sintering temperature on the porosity, bulk den sity and flexural strength of porous ceramic were studied. The crystal phase and fracture morphology of samples were characterized by XRD and SEM, respectively. The results show that the sample sintered at 1350℃ for 2h with amy- lum as the pore-forming agent exhibits the most excellent properties： its porosity is 31. 40%, maximal flexural strength is 42. 50MPa.

关 键 词：碳化硅 莫来石 多孔陶瓷 烧结温度 造孔剂 

分 类 号：TB332[一般工业技术—材料科学与工程]