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K. G. Mallikarjun, “Thermal Decomposition Kinetics of Ni(II) Chelates of Substituted Chalcones,” E-Journal of Chemistry, Vol. 1, No. 2, 2004, pp. 105-109. doi:10.1155/2004/385034

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• TITLE: Pyro and Kinetic Studies of Barium Oxalate Crystals Grown in Agar Gel

  AUTHORS: Paresh V. Dalal, Kishor B. Saraf, Navinchandra G. Shimpi, Navneet R. Shah

  KEYWORDS: Barium Oxalate; Thermo-Gravimetric Analysis; Kinetic Studies; Thermodynamic Parameters

  JOURNAL NAME: Journal of Crystallization Process and Technology, Vol.2 No.4, October 17, 2012

  ABSTRACT: Single crystals of barium oxalate have been grown using gel method at ambient temperature. Thermal characteristics and kinetic parameters of barium oxalate crystals were determined by thermo-gravimetric (TG) analysis under non-isothermal heating conditions. The pyrolysis experiments were performed with increasing temperature up-to 600℃ at heating rate of 5℃, 7℃ and 10℃ in nitrogen gas atmosphere. The pyrolysis curve showed that loss of mass took place mainly in the range of 220℃ - 400℃. At higher temperature there was a significant mass loss due to decomposition of oxalates. Ozawa and Coats & Redfern methods were used to determine the apparent activation energies of material degradation. The apparent activation energies for barium oxalate crystals were obtained 187.42 KJ·mol-1 and 185.4 KJ·mol-1 for the respective methods.