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水热处理氢氧化镁微晶性质研究 被引量:22

The Characteristic of Mg(OH)_2 Crystallite in Hydrothermal Condition
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摘要 Shape apprearance and crystallite characterization of magnesium hydroxide at different hydrothermal temperatures have been investigated by SEM, XRD and DSC methods. The grain size, cell parameter and lattice distortion rate of powders under each condition were obtained. The results show that the grains had grown up, especially along the (001) surface as the hydrothermal temperature was raised, accompanying the shrinkage of lattice and the descending of distortion rate. These could be relate to the re crystallization of Mg(OH)2, as well as the thermal diffusion of OH-with lower charges, resulting in good dispersion, high thermal decomposition temperature and enthalpy of Mg(OH)2. Moreover, it is helpful for the increase of the retardant behavior of Mg(OH)2. Shape apprearance and crystallite characterization of magnesium hydroxide at different hydrothermal temperatures have been investigated by SEM, XRD and DSC methods. The grain size, cell parameter and lattice distortion rate of powders under each condition were obtained. The results show that the grains had grown up, especially along the (001) surface as the hydrothermal temperature was raised, accompanying the shrinkage of lattice and the descending of distortion rate. These could be relate to the re-crystallization of Mg(OH)(2), as well as the thermal diffusion of OH- with lower charges, resulting in good dispersion, high thermal decomposition temperature and enthalpy of Mg(OH)(2). Moreover, it is helpful for the increase of the retardant behavior of Mg(OH)(2).
机构地区 浙江大学化学系
出处 《无机化学学报》 SCIE CAS CSCD 北大核心 2003年第6期636-640,共5页 Chinese Journal of Inorganic Chemistry
关键词 氢氧化镁 无机填充型阻燃剂 水热反应 微晶性质 Mg(OH)(2) hydrothermal XRD SEM DSC
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