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本文采用气相色谱对不同来源的γ-Fe_2O_3磁粉的表面性能进行了研究.测定了其不可逆吸咐和可逆吸咐的总量.发现γ-Fe_2O_3对有机碱乙二胺的吸咐是一种弱化学吸咐.由γ-FeOOH粒子制备而得到的γ-Fe_2O_3表面的酸性位置的活性优于由α-FeOOH粒子制备而得到的γ-Fe_2O_3.同时从两种不同形态的一水氧化铁的脱水过程其晶格变化不同的角度讨论了引起表面活性差别的原因在于脱水过程中晶格变化的不同历程而影响其酸性位置的几何学和未被占据轨道的取向.
In this paper, the surface properties of γ-Fe 2 O 3 magnetic powders from different sources were investigated by gas chromatography, and the total amount of irreversible adsorption and reversible adsorption was measured. It was found that the adsorption of γ-Fe 2 O 3 to the organic base ethylenediamine was weak Chemical adsorption.Theγ-FeOOH particles prepared by γ-FeOOH surface activity of the acidic position is better than the α-FeOOH particles prepared from the γ-Fe_2O_3 at the same time from two different forms of iron oxide dehydration The reason why the difference in surface activity is caused by the change of crystal lattice in the process is discussed in the geometry of the acidic position and the orientation of the unoccupied orbit due to the different course of lattice change in the dehydration process.