窯業用粘土質原料の強熱原料による品質評価法の検討

概要

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In order to establish the means of quality evaluation for clay materials for ceramic industry, ignition loss (Ig) was determined with the elutriated fractions from several selected clays, and the values obtained were examined in relation to the specific surface area (S), thickness of the kaolinite crystal evaluated by X-ray peak broadness (t), X-ray peak intensity ratio [Hk/Hq = I (001 reflection of kaolinite)/I (101 reflection of quartz)] , Pfefferkorn's plasticity index (PI) and characteristc value of plasticity (CV). The results obtained are summarized as follows : (1) A linear relation with negative slope between Ig and t and a hyperbolic relation between Ig and Hk/Hq were obtained. (2) Between Ig and S, a hyperbolic relation was obtained, too. (3) PI was proportional to Ig. (4) CV was nealy constant for all the fractions elutriated from the same clay material, regardless of the values of CV. (5) The use of these relations to control the quality of elutriated clays was proposed.
日本粘土学会の論文
1987-09-05