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本文用X—射线衍射、原子吸收光谱、差热热重、化学分析等方法测定了交换La~(3+)离子NaY分子筛的物相及组成,用交流阻抗谱仪测量了其离子电导。由电导率随温度的变化,得到NaY和LaNaY的电导表观活化能为49.6KJ/mol和41.3KJ/mol。讨论了交换La~(3+)离子对分子筛骨架结构中钠离子分布、落位及其扩散迁移的影响。
In this paper, the phase and composition of LaY (3+) ion NaY zeolite were determined by X-ray diffraction, atomic absorption spectrometry, differential thermal gravimetric analysis and chemical analysis. The ion conductivity was measured by AC impedance spectroscopy. From the change of conductivity with temperature, the apparent activation energies of NaY and LaNaY were 49.6KJ / mol and 41.3KJ / mol. The effects of exchanging La ~ (3+) ions on the distribution, dislocation and diffusion of sodium ions in the framework of molecular sieve were discussed.