| 杂质对石膏晶须制备的影响 |
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| 引用本文： | 王 微,刘代俊,陈建钧.杂质对石膏晶须制备的影响[J].无机盐工业,2016,48(4):31. |
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| 作者姓名： | 王 微 刘代俊 陈建钧 |
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| 作者单位： | 四川大学化学工程学院，四川成都 610025 |
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| 摘 要： | 探讨了Mg2+、Al3+和Fe3+杂质对硫酸与氯化钙反应生成的硫酸钙晶须的影响。研究表明，当温度由80 ℃升温到102 ℃时，产品由二水硫酸钙晶须转变为半水硫酸钙晶须；搅拌速度、反应物浓度、反应时间对晶须的形成影响不显著。Mg2+、Al3+和Fe3+对硫酸钙晶须的生长均有抑制作用，相同浓度下，抑制能力为Fe3+>Al3+>Mg2+；低浓度的Fe3+或高浓度的Al3+能使得晶须的形貌发生明显的变化；在全离子的作用下，晶须形貌由针状变为雪花状，并在其表面有絮状附着物。
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| 关 键 词： | 硫酸钙 晶须 反应结晶 形态学 |
Influence of impurities on preparation of gypsum whiskers |
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| WANG Wei,LIU Dai-Jun,CHEN Jian-Jun.Influence of impurities on preparation of gypsum whiskers[J].Inorganic Chemicals Industry,2016,48(4):31. |
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| Authors: | WANG Wei LIU Dai-Jun CHEN Jian-Jun |
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| Affiliation: | School of Chemical Engineering，Sichuan University，Chengdu 610065，China |
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| Abstract: | The effects of Mg2+，Al3+，and Fe3+ on the calcium sulfate whisker produced by the reactive crystallization between sulfuric acid and calcium chloride were investigated.Results showed that the whisker was slightly influenced by stirring speed，reactant concentration，and reaction time.The calcium sulfate whisker transformed from dihydrate to hemihydrate when the temperature increased from 80 ℃ to 102 ℃.And the crystallization of gypsum was controlled by Mg2+，Al3+，and Fe3+.The inhibition ability was Fe3+>Al3+>Mg2+ at the same concentration.The morphology of whisker was obviously changed at low Fe3+ concentration or high Al3+ concentration.The morphology of whisker transformed from needle-like to flake-like shape and the appearance of flocculent attachments at the surface when all the above metal ions existed in the solution. |
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| Keywords: | calcium sulfate whisker reactive crystallization morphology |
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