摘要
以高纯氧化铝为原料,通过起泡结合凝胶注模成型的方法制备了孔隙率为77%～85%、孔径为40～200μm的氧化铝多孔陶瓷.多孔陶瓷组成为α-Al2O3.多孔陶瓷的微结构可通过固含量与发泡剂加入量的改变进行调控.多孔陶瓷的耐压强度为9.40～32.50MPa,且对其断裂方式进行了研究.多孔陶瓷在1000℃下的热导率为0.80 W.(m.K)-1.
Porous alumina ceramics with 77% -85% porosity and pore size of 40- 200 μm were fabricated by foaming together with gelcasting. The composition of porous ceramics was α-A12O3, and the microstructures were tailored by modulating the solid content or the quantity of foaming agent added. The compressive strengths were 9.40 - 32.50 MPa, and the fracture mode was studied. The thermal conductivity of porous ceramics was0.80 W ·（m·K） -1 at 1 000 ℃.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2012年第4期144-148,共5页
Materials Science and Technology
基金
973项目(2010CB735810)
国家自然科学基金(51002145)
863计划项目(2009AA032503)
关键词
起泡法
凝胶注模
多孔陶瓷
耐压强度
热导率
porous ceramics
foaming
gelcasting
compressive strengths
thermal conductivity
