| 均相沉淀法制备AACHH阻燃晶须及其生长机理研究 | |
| Preparation of the AACHH Retardant Whisker by Homogeneous-Precipitation and Its Growth Mechanism | |
| 摘要: 采用均相沉淀法制备了一种新型铝系阻燃晶须AACHH，通过FTIR、TG/DTA、化学分析、XRD、SEM、AFM等手段对AACHH的结构、成分、形貌、结晶过程进行了分析与表征。结果表明：AACHH中阻燃气体释放量为63.8%，其结构分子式为NH4Al(OH)3.24(CO3)0.38·H2O，六方晶系，晶胞参数为a0=1.333 5 nm、c | |
| 关键词: AACHH 阻燃剂 晶须 均相沉淀法 生长机理 | |
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| Abstract: The advanced AACHH aluminum system retardant whisker was prepared by homogeneous -precipitation. TG/DTA, XRD, AFM and SEM were characterized to study its structure, component, crystal morphology and progress. The results show that the release weight of retardant gas is 63.8% in AACHH. Its structure molecular formula is NH4Al(OH)3.24(CO3)0.38·H2O. Its crystal structure is hexagonal system. Its unit-cell parameters are a0=1.333 5 nm, c0=1.194 1 nm. Its crystal morphology is whisker shape. Length /width ratio of the whisker is 10～30. It is considered that the growth mechanism for AACHH whisker is that the amorphous spherical nucleus is formed through homogeneous nucleation at first. When the urea has hydrolyzed at the over-saturation lever of AACHH, the growth units of AACHH is formed on the interface of the amorphous spherical nucleus. Under the mechanics of the VSL interface diffusion, through the bench bending of the vicinal interface, the growth units will grow on the kink by one-dimensional linear. | |
| Keywords: AACHH retardant whisker homogeneous-precipitation growth mechanism | |
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| 黄志良,张联盟,刘羽,汪奇林,何前军,陈伟.均相沉淀法制备AACHH阻燃晶须及其生长机理研究[J].无机化学学报,2006,22(5):795-800. | |
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