著者

高田 利夫

出版者

Japan Society of Powder and Powder Metallurgy

雑誌

粉体および粉末冶金 (ISSN:05328799)

巻号頁・発行日

vol.4, no.4, pp.160-168, 1958-04-05 (Released:2009-05-22)

参考文献数

8

被引用文献数

11 21

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Ferric oxide powders prepared by calcining iron salts exhibit a variety of colours, i. e. pure red, yellowish red, dark red, and black, according to the condition of calcination. Morphological studies revealed that the colour of powders is dependent upon the size and shape of the unit particles and their aggregates. The powders change in colour from yellowish red or dark red to black as the size of unit particles or of their aggregates increases. On the basis of this result explanations were given to the nature of colour of glaze containing iron red and, also, of water containing Fe2O3 in colloidal subdivision.