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Article

Thermophysical Properties of Materials
2004. V. 42. № 5. P. 698–703
Chekhovskoi V.Ya., Tarasov V.D., Grigor'eva N.V.
The kinetics of oxidation of zirconium iodide in an air-argon mixture at high temperatures
Annotation
The thermogravimetric method is used to investigate the kinetics of oxidation of zirconium iodide in an air-argon mixture in the temperature range from 1380 to 1968 K. The high-frequency induction heating is used to attain high temperatures. The temperature is measured by a precision optical monochromatic pyrometer using a black-body model located in the sample being investigated. The increment of sample mass is measured continuously using a spring balance. One sample is investigated, whose temperature is successively increased in jumps with stops on isotherms. The transition of tetragonal modification of oxide film to a mixture of tetragonal and cubic modifications is registered at 1745 K. The obtained results are used to calculate the Arrhenius equation for tetragonal modification of oxide film in the range from 1380 to 1730 K. The activation energy is 180.7 kJ/mol. The obtained results are compared to available literature data.
Article reference:
Chekhovskoi V.Ya., Tarasov V.D., Grigor'eva N.V. The kinetics of oxidation of zirconium iodide in an air-argon mixture at high temperatures, High Temp., 2004. V. 42. № 5. P. 698