机构地区: 华南理工大学轻工与食品学院轻化工研究所
出 处: 《河北师范大学学报(自然科学版)》 1998年第2期223-225,共3页
摘 要: 研究了FeSO4浓度及pH值(4~8)对γFeOOH在(99±1)℃下相转化为αFe2O3的影响.结果表明,Fe(Ⅱ)/Fe(Ⅲ)为3%~5%及pH值为近中性时相转化时间最短.指出Fe(Ⅱ)离子对γFeOOH的促进作用为FeOH+吸附在γFeOOH表面使其溶解造成的. Phase transformation of γFeOOH particles in the presence of FeSO4 was studied in the range of pH from 4.0~8.0 at (99±1)℃.Results showed that the catalytic activity of Fe(Ⅱ)ions for γFeOOH phase transformation at pH near neutralily,effect of Fe(Ⅱ)ions concentration on γFeOOH phase transformation was discussed.
领 域: [化学工程]