几种多相钼酸铵的热分解  

THERMAL DECOMPOSITION OF THREE COMMERCIAL POLYPHASE AMMONIUM MOLYBDATES

作　　者：尹周澜[1] 陈绍衣[1] 赵秦生[1] 王思清[1] 刘国荣[1] 

机构地区：[1]中南工业大学,宝鸡有色金属加工厂

出　　处：《有色金属》1994年第3期61-65,共5页Nonferrous Metals

摘　　要：采用差热、热重及高温Ｘ－射线衍射等测试方法，研究了三种不同来源的多相钼酸铵在加热条件下的热分解过程。研究结果表明，多相钼酸铵在加热过程中发生一系列热分解反应放出ＮＨ＿３和Ｈ２＿Ｏ，生成多种钼酸铵中间相。随着反应温度不断升高，中间相的钼含量增高，最终产物为ＭｏＯ＿３，主要热分解反应如下：DTA/TGA and high temperature XRD were employed to study the thermal dec-omPosition of three commercial polyphase ammonium molybdates.A series of in-termediary phases of amn1onium molybdates were identified during the course ofheating.The content of molybdenum in the intermediary phases increases with inc-rease of temperature, The main decomposition reactions occur in steps as follows:(NH_4)eMo_7O_(24)·4H_2O── →(NH_4)_4Mo_5O_(17)── →(NH_4)_2Mo_4O(13) (NH_4)_2Mo_4O_(13) and β-(NH_4)_2Mo_4O_(13)── →(NH_4)_...

关 键 词：多相钼酸铵 热分解反应 差热分析 热重分析 X-射线衍射分析 

分 类 号：O612.6[理学—无机化学]