ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 16, Number 3
JKCSEZ 16(3)
June 20, 1972 

Thermal decomposition of ammonium metavanadate has been investigated by using the quartz spring balance and differential thermal analysis. It showed that the decomposition of ammonium metavanadate is proceeded at two stages which correspond to 180℃-220℃ and 310℃-330℃ decomposition temperatures, respectively. Evolved ammonia gas in thermal decomposition has been analyzed quantitatively by titration. And the constituents of gases evolved have been evaluated by gas chromatography and omegatron spectrometer. From these results, it was concluded that the gases evolved in the first step decomposition were NH3 and H2O with 2:1 ratio and the second step decomposition corresponded to the formation of NH3, H2O and N2 which was produced in oxidation of NH3 by V2O5. The decomposition products were identified by means of X-ray diffraction method. The decomposition product in air was V2O5 and the product in vacuum V3O7. The kinetics of the thermal decomposition was studied, giving the values of the activation energy of 41.4 kcal/mole and 64.4 (kcal/mole) respectively.