hhen ammonium sulfate-iron oxide is treated below 573 K, ammonium sulfate can spontaneously desperse on the surface of iron oxide. Simultaneously ammonium sulfate decomposes to some extent. During or after the dispers...hhen ammonium sulfate-iron oxide is treated below 573 K, ammonium sulfate can spontaneously desperse on the surface of iron oxide. Simultaneously ammonium sulfate decomposes to some extent. During or after the dispersion, sulfate ion can interact with Fe atom on the surface of iron oxide to form a sort of surface sulfato complex of Fe and thus is transformed from the isolated into the bidentately bound form. Above 573 K the sulfato complex of Fe will gradually decompose with a further increase in temperature.展开更多
Nanometer iron red was prepared from raw materials of industry byproduct ferrous sulfate and ammonium bicarbonate by liquid phase method.The effects of many technical factors on the growing and properties of nanometer...Nanometer iron red was prepared from raw materials of industry byproduct ferrous sulfate and ammonium bicarbonate by liquid phase method.The effects of many technical factors on the growing and properties of nanometer iron red particles were discussed in this paper,Which include the oxidation time,oxidation temperature,pH value,and calcination temperature.The technical process has characteistics of short technical flow,simple tecchnical equipment and moderate technical conditions.The result measured by D/MAX-3C full auto X-ray diffraction Instrument shows that the final product prepared is α-Fe2O3,The particle-size of α-Fe2O3.was measured by H-600 tronsmission electron microscope to be 40-80nm.展开更多
文摘hhen ammonium sulfate-iron oxide is treated below 573 K, ammonium sulfate can spontaneously desperse on the surface of iron oxide. Simultaneously ammonium sulfate decomposes to some extent. During or after the dispersion, sulfate ion can interact with Fe atom on the surface of iron oxide to form a sort of surface sulfato complex of Fe and thus is transformed from the isolated into the bidentately bound form. Above 573 K the sulfato complex of Fe will gradually decompose with a further increase in temperature.
文摘Nanometer iron red was prepared from raw materials of industry byproduct ferrous sulfate and ammonium bicarbonate by liquid phase method.The effects of many technical factors on the growing and properties of nanometer iron red particles were discussed in this paper,Which include the oxidation time,oxidation temperature,pH value,and calcination temperature.The technical process has characteistics of short technical flow,simple tecchnical equipment and moderate technical conditions.The result measured by D/MAX-3C full auto X-ray diffraction Instrument shows that the final product prepared is α-Fe2O3,The particle-size of α-Fe2O3.was measured by H-600 tronsmission electron microscope to be 40-80nm.
