Abstract
The effect of gamma ray irradiation on the rate and kinetics of thermal decomposition of potassium iodate (KIO3) has been studied by thermogravimetry (TG) under non-isothermal conditions at different heating rates (3, 5, 7, and 10 K min−1). The thermal decomposition data were analyzed using isoconversional methods of Flynn–Wall–Ozawa, Kissinger–Akahira–Sunose, and Friedman. Irradiation with gamma rays increases the rate of the decomposition and is dependent on the irradiation dose. The activation energy decreases on irradiation. The enhancement of the rate of the thermal decomposition of KIO3 upon irradiation is due to the combined effect of the production of displacements and extended lattice defects and chemical damage in KIO3. Non-isothermal model fitting method of analysis showed that the thermal decomposition of irradiated KIO3 is best described by the contracting sphere model equation, with an activation energy value of ~340 kJ mol−1.
Similar content being viewed by others
References
Galwey AK, Brown ME. Thermal decomposition of ionic solids. Amsterdam: Elsevier; 1999.
Stern KH. High temperature properties and thermal decomposition of inorganic salts with oxy anions. Boca Raton: CRC Press LLC; 2001.
Vyazovkin S. Thermal analysis. Anal Chem. 2004;76:3299–312.
Vyazovkin S, Wight CA. Model-free and model-fitting approaches to kinetic analysis of isothermal and nonisothermal data. Thermochim Acta. 1999;340–341:53–68.
Rodante F, Vecchio S, Tomassetti M. Kinetic analysis of thermal decomposition for penicillin sodium salts: model-fitting and model-free methods. J Pharm Biomed Anal. 2002;29:1031–43.
Brown ME. Introduction to thermal analysis: techniques and applications. 2nd ed. Dordrecht: Kluwer Academic Publishers; 2001.
Malek J, Mitsuhashi T, Criado JM. Kinetic analysis of solid-state processes. J Mater Res. 2001;16:1862–71.
Zhou D, Schmitt EA, Zhang GG, Law D, Vyazovkin S, Wight CA, Grant DJW. Crystallization kinetics of amorphous nifedipine studied by model-fitting and model-free approaches. J Pharm Sci. 2003;92:1779–91.
Benderskii VA, Makarov DE, Wight CA. Chemical dynamics at low temperatures. New York: Wiley; 1994. p. 385.
Brown ME, Dollimore D, Galwey AK. Reactions in the solid state, comprehensive chemical kinetics, vol. 22. Amsterdam: Elsevier; 1980. p. 340.
Vyazovkin S, Wight CA. Isothermal and nonisothermal reaction kinetics in solids: in search of ways toward consensus. J Phys Chem. 1997;101A:8279–84.
Brill TB, James KJ. Kinetics and mechanisms of thermal decomposition of nitroaromatic explosives. Chem Rev. 1993;93:2667–92.
Mark HF, Bikales NM, Overberger CG, Menges G, editors. Encyclopedia of polymer science and engineering. NewYork: Wiley; 1989. p. 231, 690.
Vyazovkin S, Wight CA. Isothermal and nonisothermal kinetics of thermally stimulated reactions of solids. Int Rev Phys Chem. 1998;17:407–33.
Dollimore D. Thermal analysis. Chem Rev. 1996;68:63–72.
Galwey AK. Is the science of thermal analysis kinetics based on solid foundations?: a literature appraisal. Thermochim Acta. 2004;413:139–83.
Vyazovkin S. Kinetic concepts of thermally stimulated reactions in solids: a view from a historical perspective. Int Rev Phys Chem. 2000;19:45–60.
Kotler JM, Hinman NW, Richardson CD, Scott JR. Thermal decomposition behavior of potassium and sodium jarosite synthesized in the presence of methylamine and alanine. J Therm Anal Calorim. 2010;102:23–9.
Bertol CD, Cruz AP, Stulzer HK, Murakami FS, Silva MAS. Thermal decomposition behaviour of potassium and sodium jasorite synthesized in the presence of methyl amine and alanine. J Therm Anal Calorim. 2010;102:187–92.
Solymosi F. Structure and stability of salts of halogen oxyacids in the solid phase. London: Wiley; 1977.
Prout EG, Tompkins FC. The thermal decomposition of potassium permanganate. Trans Faraday Soc. 1944;40:488–97.
Muraleedharan K, Kannan MP, Ganga Devi T. Thermal decomposition kinetics of potassium iodate. J Therm Anal Calorim. 2011;103:943–55.
Muraleedharan K. Thermal decomposition kinetics of potassium iodate part I—the effect of particle size on the rate and kinetics of decomposition. J Therm Anal Calorim. 2012;109:237–45.
Billington DS, Crawford HJ. Radiation damage in solids. Princeton: Princeton University Press; 1961.
Harbottle G, Maddock AG. Chemical effects of nuclear transformations in inorganic systems. Amsterdam: Elsevier; 1979. p. 39.
Mohanty SR, Pandey VM. Annealing of chemical radiation damage in inorganic solids. J Sci Ind Res. 1975;34:196–210.
Diefallah EM, Baghlaf AO, Mahfouz RM. Chemical effects of cobalt neutron capture recoils in K3Co(CN)6–K3Fe(CN)6 and K3Co(CN)6–K3Cr(CN)6 mixed crystals. J Radioanal Nucl Chem. 1985;94:109–20.
Nair SMK, Jacob PD. The effect of gamma-irradiation on the thermal decomposition of magnesium bromate. J Radioanal Nucl Chem Lett. 1989;2:113–25.
Hobbs LW, Clinard FW Jr, Zinkle SJ, Ewing RC. Radiation effects in ceramics. J Nucl Mater. 1994;216:291–321.
Flynn JH, Wall LA. A quick direct method for the determination of activation energy from thermogravimetric data. Polym Lett. 1966;4:323–8.
Ozawa T. A new method of analyzing thermogravimetric data. Bull Chem Soc Jpn. 1965;38:1881–6.
Kissinger HE. Reaction kinetics in differential thermal analysis. Anal Chem. 1957;29:1702–6.
Akahira T, Sunose T. Trans joint convention of four electrical institutes, Paper No. 246, 1969, Research Report, Chiba Institute of Technology. 1971;169:22–31.
Friedman HL. Kinetics of thermal degradation of char-forming plastics from thermogravimetry application to a phenol plastic. J Polym Sci C. 1963;6:183–95.
Coats AW, Redfern JP. Kinetic parameters from thermogravimetric data. Nature. 1964;201:68–9.
Doyle CD. Series approximations to the equation of thermogravimetric data. Nature. 1965;207:290–301.
Doyle CD. Kinetic analysis of thermogravimetric data. J Appl Polym Sci. 1961;5:285–92.
Kannan MP, Muraleedharan K, Ganga Devi T. Numerical data for the evaluation of kinetic parameters of solid state decompositions by the non-isothermal method. Thermochim Acta. 1991;186:265–72.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Muraleedharan, K. Thermal decomposition kinetics of potassium iodate. J Therm Anal Calorim 114, 491–496 (2013). https://doi.org/10.1007/s10973-013-3034-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10973-013-3034-2