低温泵用椰基活性炭材料的选择和比较

Comparison and selection of coconut activated carbon for cryopump

为了选择用于核聚变研究领域中在氢、氦气环境下的低温吸附泵所用的吸附剂,在初步筛选基础上,比对了4种椰基活性炭材料。采用扫描电镜对材料微观结构进行了扫描,用比表面积及孔径分析仪测定了等温吸附性能,最终获得了活性炭样本的比表面积、微孔比表面积份额、不同孔径所对应的孔容等性能数据;通过对实验结果的比对分析,为筛选适用于核聚变研究环境下低温吸附泵使用的吸附剂材料,提供了重要的实验数据。

In order to select a suitable absorbing material for cryopump in the nuclear fusion field, one comparison experiment was performed and four candidate coconut activated carbon samples were used. The microstructure of materials was studied with scanning electron microscopy. The adsorption properties of the samples were measured with the specific surface and pore size analyzer, the specific surface area and the pore volume of different pore size were obtained. Based on the comparison results, the suitable samples were found. Some useful information is provided for the coconut activated carbon selection of cryopump in the nuclear fusion field.