莰烯基冷冻浇注成型法制备定向通孔氧化铝陶瓷  

The preparation of porous alumina ceramics with directional pore channels structure by a camphene-based freeze-casting

作　　者：刘波涛[1,2] 骆兵 许壮志 刘贵山[1] 

机构地区：[1]大连工业大学化工与材料学院,辽宁大连116034 [2]辽宁省轻工科学研究院,辽宁沈阳110036

出　　处：《功能材料》2011年第B02期163-167,共5页Journal of Functional Materials

基　　金：辽宁省科技计划资助项目(2008402026)

摘　　要：由莰烯、氧化铝、Texaphor 963组成的陶瓷料浆,在温度梯度的诱导下,用冷冻浇注成型法制备了氧化铝陶瓷坯体,经干燥、烧结后,制备出了高孔隙率、高强度的定向通孔氧化铝陶瓷。通过扫描电镜观察其孔结构,并对其孔隙率、抗压强度和收缩率进行分析测试。结果表明:料浆的固体含量和烧结温度显著影响试样的气孔率、抗压强度和收缩率;冷冻温度和烧结温度对最终的孔径分布和微观结构有较大影响。采用莰烯基冷冻浇注成型法可以制备定向通孔陶瓷材料,通过调整工艺参数来控制多孔陶瓷孔隙结构和性能,以满足不同需求。The porous alumina ceramics was prepared by freezing the slurry system,which was constituted of camphene, alumina powder and Texaphor 963, then induced by temperature gradient, followed by drying and firing. The resuhant porous ceramics had unique directional pore channels structure, high porosity and high compressive strength. The scanning electron microscope was used to observe its internal structure. The porosity, compressive strength and shrinkage of the porous ceramics were tested respectively. The resuhs show that the solid loading of the slurry and sintering temperature have remarkable effects on porosity, compressive strength and shrinkage of porous alumina ceramics, freezing temperature and sintering temperature have greater influence on pore size distribution and fracture microstructure of porous alumina ceramics. The porous ceramics with directional pore channels structure can be prepared by a camphene-based freeze casting technique, by adjusting process parameters to control the pore structure and properties of porous ceramics, in order to meet different needs of the user.

关 键 词：冷冻浇注成型 定向通孔 孔隙结构 气孔率 

分 类 号：TQ174[化学工程—陶瓷工业]