低密度SiO2气凝胶的结构与吸附特性研究
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摘要: 低密度SiO2气凝胶是一种新型纳米多孔材料，它不仅可作为惯性约束聚变的低温冷冻靶，还可作为HTO蒸汽的吸附剂用于放射性物质的环境监测。用SEM、TEM、BET、孔径分布等测试方法对低密度SiO2气凝胶的微结构进行了研究；分别以水和苯作为吸附介质， 用吸附天平对其吸附特性进行了测试，并用BET吸附理论对其吸附结果进行了解释。Abstract: Nano porous material SiO2 aerogels can not only be used as a low temperature Nuclear Target in ICF but also be used as an adsorbent of HTO vapor. BET，SEM，Pore Size Distribution and TEM techniques were used to characterize the morphology and pore structure of the low-density silica aerogels. Gas adsorption of the lowdensity silica aerogels was measured for the samples with various densities（18.6～200 kg·m-3）. Measurements were done at various pressure drops with water and benzene. The results of the adsorption isotherms were analyzed with BET multilayer adsorption theory．
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Key words:
- silica aerogel adsorption bet /
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