Structural and morphological transformation of NaX zeolite crystals at high temperature

被引：56

作者：

Lee, Hae Jin ^{[1
]}

Kim, Young Mi ^{[1
]}

Kweon, Oh Seong ^{[1
]}

Kim, Ik Jin ^{[1
]}

机构：

[1] KICET, Seoul, South Korea

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 2-3期

关键词：

NaX zeolite; X-ray methods; fuel cells; calcination; sensors;

D O I：

10.1016/j.jeurceramsoc.2006.04.156

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nearly perfect crystalline zeolite structures could be used as proton exchangeable membranes for fuel cells, potentially offering major advantages over current separation and catalytic processes. They could also be employed as host materials for semiconductor clusters from 1 to 20 nm in diameter to create electronic and optical properties specific to the form of nano-crystals. Well-shaped NaX zeolite octahedral crystals of a large size of 30 mu m were synthesized by a hydrothermal method in a mother solution having a 3.5Na(2)O:Al2O3:2.1 SiO2:593-2000H(2)O composition. Thermal treatment of NaX zeolite crystals resulted in the formation of an intermediate amorphous phase at temperature above 800 and 900 degrees C and a crystalline phase of aluminium silicate (T < 1000 degrees C). Environmental scanning electron microscopy (ESEM), high resolution transmission electron microscopy (HRTEM), X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, DTA/TGA and BET analysis were used to characterize the initial materials and the obtained products after various heat treatments. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：561 / 564

页数：4

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