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- W2080795002 abstract "(1) The main characteristics of the solid reactions between the oxides, studied in the present investigations, have been summarized. These reactions can be classified into the following two types: (1) the reactions of the systems, MgO–TiO2, CaO–TiO2 and MgO–Al2O3, which have a rapid initial reaction period and a small energy of activation, and (2) those of the systems, MgO–SnO2 and CaO–SnO2, in which no rapid initial reaction and a large energy of activation are observed. (2) The rapid initial reaction is probably due to the existence of a rapid surface diffusion, and when the reaction proceeds chiefly by the inner diffusion, no rapid initial part may be observed. (3) The effect of the particle size of each of the components on these reactions has been discussed. In the reactions without distinct surface diffusion, the effect of the particle size of the component, of which total surface area is smaller, should be great, while that of the diffused component becomes remarkable when the sufrace diffusion takes place rapidly. (4) For the three reactions, MgO-SnO2, MgO-Al2O3 and CaO-TiO2, the above discussions have been proved experimentally by changing the particle size of each of the components. (5) Technical importance of the effect of particle size on solid reactions has been stated. (6) Some further considerations on the diffusion mechanism have been given, and the difference in the energies of activation has been interpreted. (7) Finally, the phenomenon of sintering due to solid reactions has been discussed. It is considered that the sintering occurs by the reactions in which a rapid surface diffusion takes place. In conclusion, the author wishes to express his sincere thanks to Dr. R. Yoshimura for his interest, to Mr. K. Hirota for criticizing and discussing the problem willingly, and also to Dr. R. Negishi and to the other colleagues. He is also indebted to Messrs. S. Takasago and T. Sugawa for their assistances in the experiments." @default.
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- W2080795002 date "1942-05-01" @default.
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- W2080795002 title "Studies on the Reactions between Oxides in Solid State at Higher Temperatures. VI. Discussion of the Reaction Mechanism with a Special Reference to the Effect of Particle Size on the Reactions" @default.
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- W2080795002 doi "https://doi.org/10.1246/bcsj.17.229" @default.
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