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Thermal Decomposition of Ammonium Paramolybdate and its Thermodynamic Analysis AITranslate

ZHOU Xiao-ping; MA Lin; XU Xu-yao; FENG Zong-cai
Institute of Physical Chemistry, School of Chemical Science and Technology, Lingnan Normal University, Guangdong University New Materials Engineering Technology Development Center;Institute of Physical Chemistry, School of Chemical Science and Technology, Lingnan Normal University, Guangdong University New Materials Engineering Technology Development Center;Institute of Physical Chemistry, School of Chemical Science and Technology, Lingnan Normal University, Guangdong University New Materials Engineering Technology Development Center;Institute of Physical Chemistry, School of Chemical Science and Technology, Lingnan Normal University, Guangdong University New Materials Engineering Technology Development Center
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Publisher: Editorial Office of Rare Metals and Cemented Carbides
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Abstract AITranslate

Thermal decomposition of ammonium paramolybdate in 30~600℃air was analyzed by TG-DSC.The results show that there are three stages during weight loss of ammonium paramolybdate at 30~600℃,and weight loss tends to finish when the temperature is higher than 340℃.XRD pattern shows that the end product of thermal decomposition is pure orthorhombic molybdenum trioxide.The mechanism of thermal decomposition of ammonium paramolybdate in the air was proposed and theoretical verification was carried out.It is considered that ammonium paramolybdate only loses four crystal water molecules in the first stage of its thermal decomposition,while NH3 and H2O are lost by the molar ratio of 2∶1in the other three stages.Otherwise,through enthalpy change values of decomposition reaction in the various stages,approximate molar formation enthalpy was estimated of ammonium paramolybdate and the related decomposition products under the experimental conditions.

KeyWords AITranslate

ammonium paramolybdate thermal decomposition thermogravimetric analysis differential scanning calorimetry

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Basic Information:

DOI：

Chinese Library Classification Number:TQ136.12[化学工程—无机化工]

Citation Information:

Thermal decomposition of ammonium paramolybdate in 30~600℃air was analyzed by TG-DSC.The results show that there are three stages during weight loss of ammonium paramolybdate at 30~600℃,and weight loss tends to finish when the temperature is higher than 340℃.XRD pattern shows that the end product of thermal decomposition is pure orthorhombic molybdenum trioxide.The mechanism of thermal decomposition of ammonium paramolybdate in the air was proposed and theoretical verification was carried out.It is considered that ammonium paramolybdate only loses four crystal water molecules in the first stage of its thermal decomposition,while NH3 and H2O are lost by the molar ratio of 2∶1in the other three stages.Otherwise,through enthalpy change values of decomposition reaction in the various stages,approximate molar formation enthalpy was estimated of ammonium paramolybdate and the related decomposition products under the experimental conditions.

quote

GB/T 7714-2015 [1] ZHOU Xiao-ping, MA Lin, XU Xu-yao, et al. Thermal Decomposition of Ammonium Paramolybdate and its Thermodynamic Analysis[J]. Rare Metals and Cemented Carbides, 2015(3): 25-28.
MLA [1] ZHOU Xiao-ping, et al., "Thermal Decomposition of Ammonium Paramolybdate and its Thermodynamic Analysis." Rare Metals and Cemented Carbides, no. 3, 2015, pp. 25-28.
APA [1] ZHOU Xiao-ping, MA Lin, XU Xu-yao, & FENG Zong-cai. (2015). Thermal Decomposition of Ammonium Paramolybdate and its Thermodynamic Analysis. Rare Metals and Cemented Carbides(3), 25-28.
IEEE [1] ZHOU Xiao-ping, MA Lin, XU Xu-yao, and FENG Zong-cai, "Thermal Decomposition of Ammonium Paramolybdate and its Thermodynamic Analysis," Rare Metals and Cemented Carbides, no. 3, pp. 25-28, 2015. keywords: {ammonium paramolybdate;thermal decomposition;thermogravimetric analysis;differential scanning calorimetry}