THERMAL DECOMPOSITION OF THREE COMMERCIAL POLYPHASE AMMONIUM MOLYBDATE

来源期刊：中国有色金属学报(英文版)1996年第2期

论文作者：Yin Zhoulan Li Xinhai Zhou Guizhi Zhao Qinsheng

文章页码：26 - 28

Key words：ammonium molybdate;　thermal decomposition;　metallic molybdenum

Abstract: DTA/TGA and XRD were employed to study the thermal decomposition of three commercial polyphase ammonium molybdate mixtures. Aseries 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℃, (NH4)₆Mo₇O₂₄·4H₂O decomposed into (NH₄)₄Mo₅O₁₇; (2) at 220℃,(NH₄)₄Mo₅O₁₇decomposed into (NH₄)₂Mo₄O₁₃; (3) at 290℃, (NH₄)₂Mo₄O₁₃orβ-(NH₄)₂Mo₄O₁₃decomposed into MoO₃.