Número de publicación KR101824871 (B1)
Fecha de publicación: 2 de febrero de 2018
Solicitante: KOREA INSTITUTE OF CERAMIC ENGINEERING AND TECH
(Traducción automática del Koreano) The present invention relates to a method for producing a Co-FeOOH powder, comprising the steps of: adding hydrochloric chloride hydrate and cobalt chloride hydrate to a solvent and performing a substitution reaction at a temperature lower than the boiling point of the solvent; and selectively separating the precipitate after the substitution reaction to obtain a yellow- And a step of heat-treating the β-Co / FeOOH powder to obtain a black-colored CoFeO powder. According to the present invention, a rod-shaped yellow (or yellow) powder is prepared through a substitution reaction between iron (Fe) and cobalt (Co), and a tendency to become stable FeO while exhibiting red color during heat treatment is suppressed, And thus a CoFeO powder having a spinel structure can be finally synthesized, thereby making it possible to easily produce a black pigment which is not red.
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