Kinetic analysis of thermal decomposition reactions

Diefallah, El-Hussieny M.; Basahl, S.N.; El-Fass, M.M.; Al-Sabban, E.A.

doi:10.1016/0040-6031(91)80145-9

Cited by 9 publications

(1 citation statement)

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“…Influence of "/-irradiation on the decomposition of calcium and barium oxalates has been reported from this laboratory [19,20]. According to Diefallah et al [21], irradiation facilitates the decomposition of potassium nickel oxalate and decreases the activation energy. Many workers [22,23] have also reported that irradiation facilitates the rate of reaction, the effect being higher at higher doses.…”

Section: Introductionmentioning

confidence: 92%

Isothermal Decomposition of γ-Irradiated Lanthanum Oxalate

Pattnaik

Bhatta

1996

Radiochimica Acta

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Isothermal decomposition of y-irradiated (0.1 -1.0 MGy) lanthanum oxalate has been carried out at different temperatures between 623-663 Κ by gas evolution method. The a-t plots for unirradiated as well as irradiated crystals indicate that decomposition occurs through small initial gas evolution (α, ~ 0.4%) followed by short acceleratory and long decay stages. The data are well fitted to Prout-Tompkins relationship and Avrami Erofeev mechanism suggesting that nucleation occurs in a chain branching manner with two dimensional growth of nuclei. Irradiation facilitates the rate of reaction, the effect being higher at higher doses and decreases the energy of activation which may arise due to increased number of point defects and additional nucleation centres generated in the crystal lattice.

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Section: Introductionmentioning

confidence: 92%