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OALib Journal期刊
ISSN: 2333-9721
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水热处理和尿素改性对三水铝石微观结构的影响
Keywords: 无机非金属材料,？微观结构,水热,三水铝石,？碱式碳酸铝铵
Abstract:
？以尿素为改性剂,用水热处理方法对三水铝石进行了改性处理。结果表明,尿素的加入量和水热处理时间对产物微观结构有显著的影响,当尿素与三水铝石的摩尔比小于6:1时,水热处理24h的产物为片状薄水铝石;当摩尔比超过8:1时,产物为板条组装的球形碱式碳酸铝铵。纯相碱式碳酸铝铵的形成与水热处理的时间有关,随处理时间的延长,氢氧化铝经历了由三水铝石到薄水铝石与碱式碳酸铝铵混相结构再到纯相碱式碳酸铝铵的演变过程,期间发生由块体到片状再到片组装块体的微观形貌变化,最后演变为板条组装球形结构。
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