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用工业废弃磷石膏为原料制备碳酸钙晶须的研究
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【钢铁材料论文】论文关键词 磷石膏 碳酸钙 晶须 制备论文摘要 以工业废弃磷石膏为原料制备碳酸钙晶须,利用显微镜和扫描电镜观察晶体形貌,晶须样品的晶型用X衍射和红外光谱进行了表征。在未添加任何添加剂的情况下,成功制得长径比约30~60、表面光滑、大小分布均匀的文石型晶须及形貌独特的树枝状晶体,并对晶须的形成机制进行了分析。用磷石膏为原料制备碳酸钙晶须的最佳工艺条件为反应温度60~80 ℃,碳酸钠溶液滴加速度小于16 mL/min,搅拌转速为300~450 r/min。 Keywords:phosphogypsum;calcium carbonate;whiskers;preparation Abstract:Calcium carbonate whiskers were synthesized by using industrial waste phosphogypsum as raw materials.Calcium carbonate crystal form was characterized by microscope and electron-scanning microscope,XRD and FTIR analysis was employed to investigate the morphology of calcium carbonate whiskers. The smooth and uniform calcium carbonate whiskers with aspect ratio 30-60 were produced without any additive, and the special branch-like calcium carbonate crystal was also prepared surprisingly. Furthermore, the mechanism for the calcium carbonate whiskers gr
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