Study on the Adhesive Force of Powder Coating Layer (II):Effect of Particle Size and Baking Condition on Adhesive Force

概要

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The influence of particle size and baking condition on the adhesive force of phosphor powder layers, applied to glass substrates, was investigated by a centrifugal method. The powder layers were made from mixing two kinds of phosphor powder, with different particle size. The adhesive force increased when the amount of finer powder in the mixture increased ; also it increased linearly with baking time. The dependency of adhesive force on mixing ratio was larger than that predicted by a theoretical equation. To explain this discrepancy, an assumption was made that micro sintering occurred during the baking process. To suppress the sintering effect, the adhesive force obtained from extrapolating to time=0, for several temperatures were evaluated. The adhesive force thus obtained was in good accordance with the theoretical model, making clear that the micro sintering occurred during the baking process : The apparent activation energy of micro sintering being 35 kcal/mole.
Japan Society of Colour Materialの論文