Kinetics of thermal decomposition of Co3O4 powder and single crystals

Małecki, Andrzej; Tareen, J. A. K.; Doumerc, Jean‐Pierre; Rabardel, L.; Launay, J.C.

doi:10.1016/0022-4596(85)90251-8

Cited by 17 publications

(10 citation statements)

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“…This eould indicate that the ratelimiting step is a chemical reaction. However, such a conclusion does not explain the changes in activation energy with the decomposition rate noted in many papers [1,[6][7][8]. Furthermore, our attempts to apply a simple reaction model to Co304 thermal decomposition were unsuccessful.…”

Section: Resultsmentioning

confidence: 51%

“…The detailed description of the experiment is given in ref. [1] and [2]. Equation (1) used to explain the experimental a vs. t curves in the scope of the extended Ginstling-Brounstein model [2,3].…”

Section: Resultsmentioning

confidence: 99%

“…This layer is very compact and well attached to the surface of the unreacted grain, as shown in our previous work [1].…”

mentioning

confidence: 79%

“…In reference [1] we have shown that the kinetics of Co304 thermal decomposition under an oxygen partial pressure of 0.67 Pa can be described with very high accuracy by the following equation:…”

mentioning

confidence: 99%

“…1-2a/3-(1 -a)2/3 = kt n (1) where a is the degree of decomposition and k and n are constants. as a kinetic one, since it allows determination of an activation energy which actually depends on the degree of decomposition.…”

mentioning

confidence: 99%

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Kinetics of thermal decomposition of Co3O4 powder and single crystals

Małecki

Doumerc

1990

Journal of Thermal Analysis

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The kinetics of the thermal decomposition of Co304 is described using a mixed-control model in which the reaction rate is controlled simultaneously by both a diffusional process and a chemical reaction. The observed dependence of the activation energy on the degree of decomposition, and the activation energies of the diffusion and of the chemical reaction are given.The thermal decomposition of Co304" Co304 ~ 3CoO + 1/202 leads to the formation of a layer of CoO. This layer is very compact and well attached to the surface of the unreacted grain, as shown in our previous work [1].In reference [1] we have shown that the kinetics of Co304 thermal decomposition under an oxygen partial pressure of 0.67 Pa can be described with very high accuracy by the following equation:where a is the degree of decomposition and k and n are constants. The above equation has been derived directly from a kinetic analysis of the experimental a vs.t curves. We have shown that Eq. (1) can be regarded

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Section: Resultsmentioning

confidence: 51%

Section: Resultsmentioning

confidence: 99%

“…This layer is very compact and well attached to the surface of the unreacted grain, as shown in our previous work [1].…”

mentioning

confidence: 79%

mentioning

confidence: 99%

mentioning

confidence: 99%