青色無機顔料コバルトブルーの色調におよぼすコバルト原料化合物の影響

Translated title of the contribution: Influence of cobalt source compounds on the color tone of cobalt blue inorganic pigment

Mika Yoneda, Yuya Tatsumi, Yasushi Mino, Koichi Nakaso, Kuniaki Gotoh, Makoto Nakanishi, Tatsuo Fujii, Yasuhiro Konishi, Toshiyuki Nomura

Research output: Contribution to journalArticle

Abstract

The color tone of pigments is affected by various factors such as crystal structure and particle size. These characteristics should be determined by synthesis condition. In this study, the influence of cobalt source on the color tone of cobalt blue pigment was investigated. Cobalt blue (CoAl2O4) was synthesized by solid-state reaction method. Co3O4 and Co(OH)2 with two different particle sizes were used as the cobalt source, and γ-Al2O3 was used as the aluminum source. The products were characterized by spectrophotometry, XRD, SEM, and TG/DTA. It was revealed that the chroma of the synthesized cobalt blue depends on the cobalt source. The cobalt blue synthesized using smaller size Co(OH)2 showed most vivid color. It was suggested that the number of the contact points between the starting materials increased with decreasing the particle size, leading to the progress of the reaction.

Original languageJapanese
Pages (from-to)446-451
Number of pages6
JournalJournal of the Society of Powder Technology, Japan
Volume56
Issue number8
DOIs
Publication statusPublished - Jan 1 2019

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ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes
  • Filtration and Separation

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