利用碳酸氢钙水热分解制备了具有不同形貌和晶相的碳酸钙.在水热情况下,得到了多种形貌的方解石和霰石碳酸钙,研究了碳酸氢钙浓度、添加剂氯化镁浓度、反应时间和温度等对碳酸钙形貌和晶相的影响.以X射线衍射(XRD)和扫描电镜(SEM)对制备的碳酸钙进行了表征.研究发现,水热条件对碳酸钙形貌和晶相的形成以及演化过程有重要影响.水热条件下发现了稳定的碳酸钙晶相向亚稳定相转化的反常相变,对相关的形成及转化机理进行了相应的阐述.
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