Research the Performance of Alumina Insulation Material by Freeze-Drying

摘要：

　　The traditional method of preparation alumina insulation material includes the addition of pore-forming agent,direct foaming,foam impregnation and gel-casting.In this experiment,α-alumina as raw material,silica fume as an additive,Combination freeze-drying method,add pore-forming agent and direct foaming successfully prepared low-density,high strength,low thermal conductivity of alumina insulation material.Change the particle size of pore-forming agent can be get different properties of the sample.The SEM photograph was clearly observed that the hole wall dense uniform,α-alumina particles sufficient contact,no significant ice sublimation hole left.There are also the reasons of the sample with higher value of bending strength and compressive strength.This can make a control of porosity,as well as pore size,pore shape and pores space topology of alumina insulation material.

关键词： freeze-drying porous alumina thermal conductivity

作者: Daoyuan Yang Guanghui Wei

作者单位: School of Materials Science and Engineering,Zhengzhou University,Henan 450001,China

会议类型: 国际会议

会议名称: The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))

会议地点: 厦门

会议语种:英文

页码: 527-530

在线出版日期: 2011-11-04（万方平台首次上网日期，不代表论文的发表时间）