Crystallization and spontaneous phase transformation of MTN-type zeolite with tetragonal symmetry

被引：5

作者：

Song, MY

Wang, XQ

Zhou, WZ

He, HY

Sun, YJ

Wu, TL

Long, YC ^{[1
]}

机构：

[1] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China

[2] Fudan Univ, Ctr Anal & Measurement, Shanghai 200433, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2002年 / 164卷 / 01期

基金：

中国国家自然科学基金;

关键词：

MTN zeolite; spontaneous phase transformation; N-ethyl-hexamethylenetetraammonium bromide;

D O I：

10.1006/jssc.2001.9434

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

MTN-type zeolite with tetragonal symmetry was hydrothermally synthesized in a reactant system of Na2O-SiO2-NaF-H2O using N-ethyl-hexamethylenetetraammonium bromide as the template. A spontaneous phase transformation of the assynthesized zeolite at ambient temperature from tetragonal to cubic symmetry was investigated with polarized light microscopy, X-ray powder diffraction Si-29 magic angle spinning nuclear magnetic resonance, and differential scanning calorimetry. The results of the investigations indicate that the as-synthesized tetragonal MTN zeolite is a metastable phase. (C) 2002 Elsevier Science (USA).

引用

页码：19 / 26

页数：8