高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (9): 926.

• 论文 • 上一篇    下一篇

SUY的晶胞参数和骨架振动频率与其硅铝比间的关系

蒋大振, 吕慧娟, 汤凤杰, 矫庆泽, 刘晓勋   

  1. 吉林大学化学系
  • 收稿日期:1987-03-03 出版日期:1988-09-24 发布日期:1988-09-24
  • 通讯作者: 吕慧娟

Relation of SiO2/Al2O3 Ratio to Crystal Lattice Parameter and Framework Vibration Frequencies

Jiang Dazhen, Lu Huijuan, Tang Fengjie, Jiao Qingzhe, Liu Xiaoxun   

  1. Department of Chemistry, Jilin University, Changchun
  • Received:1987-03-03 Online:1988-09-24 Published:1988-09-24

摘要: 用SiCl4(气)高温处理HY制得一系列USY(T),以USY(T)的晶胞常数α0对其单位晶胞中铝原子的数目作图,发现c0在24.45~24.55有一断落区间。由实验结果推导出两个以晶胞常数计算USY骨架硅铝比的公式。用400~1500cm-1范围的红外光谱研究了USY的骨架变化。一些骨架振动特征频率与晶胞常数,单位晶胞中铝原子分数的相关图,也都出现断落区间。当晶胞常数小于24.41时,460cm-1及1145cm-1的两个峰发生劈裂。随晶胞常数的减少光谱峰变窄。

关键词: 晶胞参数, 硅铝比, 骨架振动频率

Abstract: X-ray powder diffraction has been applied to study ultrastable fau-jasites prepared by treating HYwith SiCl4 at high temperature. Aplot of the crystal lattice paramer of USYagainst the number of Al atoms per unit cell shows distinct break at crystal lattice parameter near 24.45 to 24.55. Two equations have been got to calculate the SiO2/Al2O3 ratio of USYframework from crystal lattice parameters.The infrared spectrum in the region 400 to 1500cm-1 is a sensitive tool indicating structural features of zeolite frameworks. The plots of several frequencies against -crystal lattice parameters and atoms fraction of Al also show distinct breaks. When a crystal lattice parameter is small than 24.41, bands are split about 460 and 1145cm-1. The peaks tend to be sharp with decrease in crystal lattice parameter.

Key words: Lattice paramater, Silica/Alumina ratio, Framework frequency

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