凝胶-发泡法制备多孔氧化铝隔热材料的研究
Study on Preparation of Porous Alumina Insulation Materials by Gel-foaming
张 林, 杜景红, 甘国友, 严继康
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作者单位：昆明理工大学 材料科学与工程学院 稀贵及有色金属先进材料教育部重点实验室 云南省新材料制备与加工重点实验室, 云南 昆明 650093
中文关键字：凝胶-发泡法； 氧化铝多孔陶瓷； 隔热材料
英文关键字：gel-foaming; porous alumina ceramics; insulation
中文摘要：结合凝胶注模和发泡法制备了多孔氧化铝隔热材料，研究了发泡剂用量、固相含量和烧结温度等对氧化铝陶瓷气孔率的影响。结果表明，当发泡剂用量为1wt%、固相含量为45vol%、烧结温度为1500 ℃时，可制备出总气孔率和闭气孔率高、孔径较小且分布均匀、强度高和热导率低的多孔氧化铝陶瓷。
英文摘要：Porous alumina insulation materials were prepared by the combination of gel-casting and foaming method. The effects of the amount of blowing agent, the solid volume and the sintering temperature on the porosity of aluminum oxide ceramic were studied. The results show that, when the amount of blowing agent is 1wt%, the solid volume is 45vol% and the sintering temperature is 1500 ℃, the porous alumina ceramic with high porosity, small pore diameters, particle evenly distribution, high strength and low heat conductance is prepared.