超微细高密度铁磁记录材料的合成研究——(Ⅰ)α-FeOOH和α-Fe_2O_3的合成

SYNTHESIS OF SUPER MICRO AND HIGH DENSITY MAGNETIC RECORDING MATERIALS()SYNTHESIS OF -FeOOH and -Fe2O3.

介绍了α－ＦｅＯＯＨ和α－Ｆｅ２Ｏ３的合成途径。采用ＦｅＳＯ４、ＮａＯＨ作基础原料，通过选择适宜的合成条件，先合成具有针状结构的α－ＦｅＯＯＨ，然后将α－ＦｅＯＯＨ热处理成α－Ｆｅ２Ｏ３，最后将α－Ｆｅ２Ｏ３制成γ－Ｆｅ２Ｏ３。合成的α－Ｆｅ２Ｏ３呈均匀的针状结构，晶体的长轴和短轴之比在８．４∶１～９．５∶１之间，晶体的平均粒子长度在０．１５１～０．１５７μｍ之间。

he ways for synthesis of -FeOOH and -Fe2O3 are introduced.FeSO4,NaOH are used as the original materials.The acicular -FeOOH is synthesized first under the optimum condition,then the -FeOOH is changed into -Fe2O3 by thermal treatment, finally,the -Fe2O3 is transformed into -Fe2O3.The synthesized compound -Fe2O3 is needle shape and the ratio of the major axis to minor one of the crystals is in the range of 8.419.51.The mean length of the particles is in the range of 0.1510.157 m.The reappearance of the method is well.