论文部分内容阅读
采用溶胶凝胶法在氢化锆表面制备防氢渗透膜层,分析了不同前驱体溶胶浓度对氢化锆表面膜层的性能影响。借助XRD、SEM等分析手段对氧化层的物相组成和形貌进行分析,并采用真空脱氢试验测试氧化层的阻氢性能PRF值(permeation reduction factor)。试验表明,在前驱体溶胶浓度范围内可制膜层厚度为5~14.3μm,膜层厚度随着溶胶浓度升高呈现先升高后下降的趋势。当溶胶浓度低于1.0 mol/L时,不易生成连续完整的膜;当溶胶浓度高于1.0 mol/L时,膜层表面出现了颗粒堆积和裂纹,膜层不连续。氧化物的相结构无明显改变,以单斜相M-Zr O2和四方相T-Zr Ox为主;氧化层的PRF值在9.86~10.43之间变化。
Hydrogen permeable membrane was prepared on the surface of zirconium hydride by sol-gel method. The effects of different precursor concentrations on the performance of hydrotalcite were analyzed. The phase composition and morphology of the oxide layer were analyzed by means of XRD and SEM, and the hydrogen permeation reduction factor (PRF) of the oxide layer was tested by vacuum dehydrogenation test. The experimental results show that the thickness of the film can be 5 ~ 14.3μm in the range of precursor sol concentration, and the thickness of the film first increases and then decreases with the increase of sol concentration. When the sol concentration is lower than 1.0 mol / L, it is not easy to form a continuous intact film. When the sol concentration is higher than 1.0 mol / L, the grain layer appears on the surface of the film and cracks, the film is not continuous. The phase structure of the oxide did not change significantly, with monoclinic phase M-Zr O2 and tetragonal phase T-Zr Ox. The PRF of the oxide layer varied from 9.86 to 10.43.