论文部分内容阅读
本文用X—光射线衍射、原子吸收光谱及热重等方法测定了交换有La~(3+)离子的NaA分子筛LaNaA的组成,用交流阻抗谱测定了其离子电导,由电导率随温度的变化,得到了NaA和LaNaA的电导表观活化能分别为54.9KJ/mol和37.6KJ/mol。讨论了交换有La~(3+)离子后对分子筛骨架结构中Na~+离子分布、落位以及扩散迁移的影响。
In this paper, the composition of LaNaA zeolite exchanged with La ~ (3+) ions was determined by X-ray diffraction, atomic absorption spectroscopy and thermogravimetry. The ion conductivity was measured by AC impedance spectroscopy, The apparent activation energies of NaA and LaNaA were 54.9KJ / mol and 37.6KJ / mol, respectively. The effects of exchange of La ~ (3+) ions on the distribution, dislocation and diffusion of Na ~ + ions in the framework of molecular sieve were discussed.