| 沉淀法控制制备亚微米与纳米CaF2 |
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| 引用本文： | 吕燕飞,吴希俊,吴大雄,赵士超,霍德璇.沉淀法控制制备亚微米与纳米CaF2[J].材料科学与工程学报,2010,28(4). |
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| 作者姓名： | 吕燕飞 吴希俊 吴大雄 赵士超 霍德璇 |
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| 作者单位： | 杭州电子科技大学理学院,浙江,杭州,310018;浙江大学材料科学与工程系,浙江,杭州,310027;浙江大学材料科学与工程系,浙江,杭州,310027;青岛科技大学材料科学与工程学院,山东,青岛,266042;浙江大学材料科学与工程系,浙江,杭州,310027;杭州电子科技大学理学院,浙江,杭州,310018 |
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| 基金项目： | 浙江省教育厅基金资助项目(20070262) |
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| 摘 要： | 本文在纯水溶剂和乙醇/水混合溶剂中沉淀制备亚微米和纳米CaF2粉体,对沉淀产物的粒径控制进行了研究。用TEM和XRD对CaF2沉淀的粒径和形貌进行表征。在纯水溶剂中,通过改变反应物浓度和反应物混合速度以控制形核和晶粒长大比例,成功制备了粒径分别为242nm,79nm和51nm的CaF2粉体。在混合溶剂中,通过改变水/乙醇的体积比改变混合溶剂的介电常数从而改变CaF2的溶解度的方法,在1∶1,1∶4和纯乙醇中分别获得粒径为31nm,23nm和12nm的CaF2粉体,沉淀粒径的倒数和混合溶剂介电常数的倒数间呈线性关系。结果表明,在水溶液中通过控制形核和晶粒长大比例适宜制备粒径较大的沉淀粉末,混合溶剂中改变CaF2的溶解度适合制备纳米级沉淀粉体,两种手段综合运用,可以在大范围内调节沉淀粉末粒径。
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| 关 键 词： | CaF2 沉淀 粒径控制 混合溶剂 形核和晶粒长大 |
Synthesis and Size Control for Calcium Fluoride Powders by Precipitation Method |
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| LV Yan-fei,WU Xi-jun,WU Da-xiong,ZHAO Shi-chao,HUO De-xuan.Synthesis and Size Control for Calcium Fluoride Powders by Precipitation Method[J].Journal of Materials Science and Engineering,2010,28(4). |
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| Authors: | LV Yan-fei WU Xi-jun WU Da-xiong ZHAO Shi-chao HUO De-xuan |
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| Affiliation: | LV Yan-fei~1,2,WU Xi-jun~2,WU Da-xiong~3,ZHAO Shi-chao~1,HUO De-xuan~1(1.School of Science,Hangzhou Dianzi University,Hangzhou 310018,China,2.Department of Materials Science , Engineering,Zhejiang University,Hangzhou 310027,3.College of Materials Science , Engineering,Qingdao University of Science , Technologhy,Qingdao 266042,China) |
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| Abstract: | Synthesis and size control of the CaF_2 powders in the sub-micron and nano-meter ranges were investigated by precipitation method in the pure water solvent and ethanol/water mixed solvents.The particle size and morphology of CaF_2 powders were characterized by transmission electron microscopy(TEM) and X-ray diffractometry(XRD).The results indicate that in the aqueous solvent,CaF_2 powders with the average particle sizes of 242nm,79nm and 51nm were obtained through controlling the ratio of nucleation to grai... |
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| Keywords: | CaF_2 precipitation size control mixed solvent nucleation and grain growth |
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