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D. Bhatta

Bio: D. Bhatta is an academic researcher from Utkal University. The author has contributed to research in topics: Thermal decomposition & Gas evolution reaction. The author has an hindex of 6, co-authored 21 publications receiving 98 citations.

Papers
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Journal ArticleDOI
H Nayak1, D. Bhatta1
TL;DR: In this paper, a study on the thermal decomposition of mixtures of lanthanum oxalate hydrate and magnesium chromite spinel, MgCr2O4 of different molar ratios has been carried out employing thermogravimetry, differential thermal analysis, chemical analysis, infrared spectroscopy and X-ray diffraction analysis.

19 citations

Journal ArticleDOI
TL;DR: In this paper, the influence of a number of additives (CuO, Cr2O3, TiO2 and Al 2O3) on the solid phase thermal decomposition of barium bromate has been investigated at 563 K. The results show that regardless of the semiconductive properties of the oxides, the initial gas evolution is the same (α $ 0.04) in all cases, and that the additives shorten the duration of the induction period.

13 citations

Journal ArticleDOI
TL;DR: In this article, the effects of SO42− doping and Y-irradiation on the isothermal decomposition of barium bromate have been investigated gasometrically with a vacuum apparatus.
Abstract: The effects of SO42− doping and Y-irradiation on the isothermal (563 K) decomposition of barium bromate have been investigated gasometrically with a vacuum apparatus. Plots of the fraction decomposed avs. timet for pure, doped and irradiated crystals exhibited characteristic stages: initial gas evolution (initial puff), an induction period, linear reaction, an acceleratory period and decay. The data are considered in the light of various kinetic models, e.g. linear rate equation, Prout-Tompkins and Avrami-Erofeev. The plausible mechanism of the reaction and the effects on this of anion vacancies and Y-irradiation are discussed briefly.

8 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of the semiconductive oxides CuO, TiO2 and Cr2O3 on the isothermal decomposition of barium oxalate has been studied gasometrically.

8 citations

Journal ArticleDOI
TL;DR: Barium bromate decomposes in the solid state through various stages: (i) initial gas evolution, (ii) induction period, slow linear reaction, (iv) acceleratory and decay stages as discussed by the authors.
Abstract: Barium bromate decomposes in the solid state through various stages: (i) initial gas evolution, (ii) induction period, (iii) slow linear reaction, (iv) acceleratory and decay stages. Rare earth semiconductors (p-type), Gd2O3 and Dy3O3 facilitate the acceleratory and decay stages without affecting the induction and linear periods. The extent of decomposition is higher in the case of mixture than that of the pure salt. The data are discussed in the light of theories of Prout—Tompkins and Avarami-Erofeev mechanisms exploring that nucleation occurs in a chain branching manner and there is two dimensional growth of nuclei.

6 citations


Cited by
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Journal ArticleDOI
TL;DR: In more than 50 years since its publication, a paper in the Transactions of the Faraday Society by Prout and Tompkins has been extensively cited in the literature The paper dealt with the kinetics of the thermal decomposition of crystals of potassium permanganate, and suggested a rate equation for use in the kinetic analysis of solid-state reactions as mentioned in this paper.

116 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of Nd2O3 on thermal and ballistic properties of ammonium perchlorate (AP) based composite propellant has been studied during this work.

68 citations

BookDOI
01 Jan 2016

65 citations

Journal ArticleDOI
TL;DR: In this article, a hombohedral structure p-type semiconductor Cr2O3 nanowires were generated by sol-gel template technology with the diameters in the range of 100-300nm and the lengths ca. 10μm.
Abstract: Rhombohedral structure p-type semiconductor Cr2O3 nanowires were generated by sol-gel template technology with the diameters in the range of 100–300nm and the lengths ca. 10μm. A sharp ultraviolet photoluminescence band (full width at half maximum=13.8nm) at the wavelength of 385nm (3.22eV in photon energy) was observed, which was attributed to the transition involving 3d3 electron of the Cr3+ ions.

62 citations

Journal ArticleDOI
TL;DR: In this paper, 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 Kmin−1).
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.

31 citations