Influence of Mn on the Color of Ferric Oxide Powders
The authors revealed that the inpurity Mn in the ferric oxide is the main factor of the color difference between the ferric oxide powder from the sulfate type process and from chloride type. The mechanism of the influence of the Mn atom, which is substituted for the Fe atom, is investigated by the DV-Xa calculation method. As a result, ferric oxide powders from the sulfate type process and from chloride type show different color trends. Color of ferric oxide powders vary from bright red to subdued red as Mn content increases. Change of the electronic density of states (DOS), which is caused by Mns 3d electronic orbital, is observed by substituting Mn atom for Fe atom. It is considered that change of DOS is engaged in absorption of light with a specific wavelength, therefore the color of ferric oxide powders vary with Mn content.
ferric oxide powders pigment ferrite Mn color DV-Xct electronic density of states DOS
T.Kikuchi S.Kijima S.Gotoh H.Minemura H.Asaoka J.Takada
Chemical Research Laboratory,JFE Chemical Corporation Kawasaki-cho I,Chuo-ku,Chiba,260-0835,Japan Chemical Research Laboratory,JFE Chemical Corporation Kawasaki-dori I,Mizushima,KurashikL 712-8511,J Technology & Administration Sec.,West Japan Works,JFE Chemical Corporation Kawasaki-dori I,Mizushima Okayama University Graduate School of Natural Science and Technology Tsusima-naka 3-1-1,Okayama,700-
国际会议
The 10th International Conference on Ferrites(2008中国国际铁氧体研讨会)
成都
英文
244-247
2008-10-10（万方平台首次上网日期，不代表论文的发表时间）