HYDROLYSIS OF MOLYBDENUM AND TUNGSTEN ALKOXIDES - SOLS, POWDERS AND FILMS

被引：44

作者：

YANOVSKAYA, MI ^{[1
]}

OBVINTSEVA, IE ^{[1
]}

KESSLER, VG ^{[1
]}

GALYAMOV, BS ^{[1
]}

KUCHEIKO, SI ^{[1
]}

SHIFRINA, RR ^{[1
]}

TUROVA, NY ^{[1
]}

机构：

[1] MV LOMONOSOV STATE UNIV,DEPT CHEM,MOSCOW 117234,USSR

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1990年 / 124卷 / 2-3期

关键词：

D O I：

10.1016/0022-3093(90)90258-N

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：

Hydrolysis of molybdenum and tungsten alkoxides of the two series MO(OEt)4 and MO2(OEt)2 (M = Mo, W) has been studied. Hydrolysis products and the partially hydrolyzed solutions have been characterized by means of X-ray diffraction, IR, electron spectroscopy and small-angle X-ray scattering. Preparation of stable sols is reported and their structures are discussed in terms of a fractal model. While 'tungsten solutions' may be described as typical polymeric sols, 'molybdenum solutions' should be regarded as particulate sols. The reason for this difference has its origin in the structures of alkoxides and mechanisms of their hydrolysis. Sols were used for the preparation of electrochromic and photochromic films by spin-coating techniques. A coloration mechanism is discussed in terms of the percolation model. Some properties of the composite structures WO3TiO2, n-SiWO3 are also reported. © 1990.

引用

页码：155 / 166

页数：12

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