Thermal decomposition of three commercial polyphase ammonium molybdate

被引：0

作者：

Yin, ZL ^{[1
]}

Li, XH ^{[1
]}

Zhou, GZ ^{[1
]}

Zhao, QS ^{[1
]}

Chen, SY ^{[1
]}

机构：

[1] CENT S UNIV TECHNOL,DEPT CHEM,CHANGSHA 410083,PEOPLES R CHINA

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 1996年 / 6卷 / 02期

关键词：

ammonium molybdate; thermal decomposition; metallic molybdenum;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

DTA/TGA and XRD were employed to study the thermal decomposition of three commercial polyphase ammonium molybdate mixtures. A series of intermediate phases of ammonium molybdates, in which the content of molybdenum increases with the raise of temperature, were identified during the course of heating. The main decomposition reactions occurred in steps as follows: (1) at 110 degrees C, (NH4)(6)Mo7O24. 4H(2)O decomposed into (NH4)(4)Mo5O17; (2) at 220 degrees C, (NH4)(4)Mo5O17 decomposed into (NH4)(2)Mo4O13; (3) at 290 degrees C, (NH4)(2)Mo4O13 Or beta- (NH4)(2)Mo4O13 decomposed into MoO3.

引用

页码：26 / 28

页数：3