直接发泡法制备孔特性可控的氧化铝泡沫陶瓷

Alumina Ceramic Foams with Controllable Cell Structure Prepared by Direct Foaming

综述了近10年氧化铝泡沫陶瓷方面的研究进展,包括表面活性剂稳定泡沫制备的开孔泡沫陶瓷和颗粒稳定泡沫制备的闭孔泡沫陶瓷。对于表面活性剂稳定泡沫,分别采用环氧树脂–多胺和自发凝固2种凝胶体系进行固化成型,制备开孔氧化铝泡沫陶瓷。对于颗粒稳定泡沫,在采用调节浆料pH值或加入分散剂制备陶瓷浆料的基础上,使用长链的表面活性剂对分散的陶瓷颗粒进行疏水修饰,直接发泡后具有自发固化特性,制备出闭孔氧化铝泡沫陶瓷。

This review deals with the research progress of alumina ceramic foams for the last decade,i.e.,open-cell alumina foams prepared from surfactant-stabilized foams and closed-cell alumina foams prepared from particle-stabilized foams.For surfactant-stabilized foams,epoxy–amine gel-casting and spontaneous coagulation casting are used to solidify the foams,thus obtaining alumina ceramic foams with an open-cell structure.For particle-stabilized foams,surfactants with long chains are used to hydrophobically modify alumina particles dispersed by adjusting pH value or adding dispersant.After direct foaming,particle-stabilized foams spontaneously solidify,thus obtaining alumina ceramic foams with a closed-cell structure.