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本文主要介绍用sol gel法制备具有纳米结构的SiO2 、TiO2 和ZrO2 材料。这些材料的孔洞率和比表面积甚高 (孔洞率为 80 %～ 99 8% ,比表面积为 10 0 0m2 /g) ,孔洞尺寸和体积密度极小 (典型的孔洞尺寸为 1～ 10 0nm ,最低体积密度为 10kg/m3 ) ;折射率n在 1 1～ 1 9范围内可调 ,并在相当大的范围具有很好的光谱选择性 ;材料的耐温特性良好 ,可耐温 5 0 0℃以上。这些结构和性能特点有可能为惯性约束聚变研究扩展了靶材料选择的范围。此外 ,就制备过程中前驱体的选择、水解度和催化剂的影响、凝胶过程和后处理工艺对材料结构特性的影响进行了讨论
This article mainly introduces the preparation of nanostructured SiO2, TiO2 and ZrO2 materials by sol-gel method. These materials have very high porosity and specific surface area (porosity of 80% -99 8%, specific surface area of 100 m2 / g), very small pore size and bulk density (typical pore size is 1 to 100 nm, the lowest Bulk density of 10kg / m3); refractive index n adjustable in the range of 11 ~ 19, and in a very large range with good spectral selectivity; good temperature properties of the material, the temperature can be 500 ℃ the above. These structural and performance characteristics have the potential to extend the range of target material choices for inertial confinement fusion studies. In addition, the choice of precursors in the preparation process, the degree of hydrolysis and the influence of the catalyst, the influence of the gel process and the post-treatment process on the structural properties of the material are discussed