Investigations on NH₄VO₃ thermal decomposition in dry air

Abstract

The results of investigations on thermal decomposition of NH₄VO₃ in dry air have been presented. TG–DSC measurements were carried out under non-isothermal conditions at linear change of samples temperature in time and under isothermal conditions. Characterization of the products structure was performed by XRD method. MS method was used to determine evolved gaseous products. The decomposition of NH₄VO₃ was described by the following equation:

$$ 6 {\text{NH}}_{ 4} {\text{VO}}_{ 3} \to \, \left( {{\text{NH}}_{ 4} } \right)_{ 3} {\text{V}}_{ 6} {\text{O}}_{ 1 6} \to \, \left( {{\text{NH}}_{ 4} } \right)_{ 2} {\text{V}}_{ 6} {\text{O}}_{ 1 6} \to {\text{ V}}_{ 2} {\text{O}}_{ 5}.$$