ABSTRACT Nepheline porous ceramics with improved strength and well thermal insulation performance were synthesised at 850–1000°C by a foam-gelcasting technology, using waste zeolite powders, triethanolamine lauryl sulphate and xanthan gum respectively as the starting materials, foaming agent and gelling agent. The effect of sintering temperatures and solid contents on the physical and thermal properties of final samples were investigated. The strengths of foams increased with the firing temperatures and solid levels, and the sample possessing the porosity of 71.9% exhibited the highest compressive strength of 2.9 MPa 1, respectively. Moreover, the one with a solid content of 20 wt-% and fired at 950°C containing 76.9% porosity and having compressive strengths respectively of 1.8 MPa showed the lowest thermal conductivity of 0.10 W/(m oC) at 25°C, suggesting that as-prepared porous ceramics could be potentially used as a good thermal insulation material.

中文翻译：

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以废沸石为原料制备多孔陶瓷

摘要 以废沸石粉、三乙醇胺十二烷基硫酸盐和黄原胶为起始原料，分别以发泡剂和胶凝剂为原料，采用泡沫-凝胶浇注技术，在850-1000°C下合成了强度更高、隔热性能好的霞石多孔陶瓷。研究了烧结温度和固含量对最终样品的物理和热性能的影响。泡沫的强度随着烧制温度和固含量的增加而增加，孔隙率为 71.9% 的样品分别表现出最高的抗压强度 2.9 MPa 1。此外，固体含量为 20 wt-% 并在 950°C 下烧制的含有 76.9% 孔隙率和抗压强度分别为 1.8 MPa 的材料在 25°C 下表现出最低的热导率为 0.10 W/(m oC)，