| 油酸修饰纳米氟化钙的萃取法制备及其摩擦学性能 |
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| 引用本文： | 王李波,王晓波,张明.油酸修饰纳米氟化钙的萃取法制备及其摩擦学性能[J].摩擦学学报,2009,29(4):299-305. |
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| 作者姓名： | 王李波 王晓波 张明 |
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| 作者单位： | 河南理工大学材料科学与工程学院;中国科学院兰州化学物理研究所固体润滑国家重点实验室; |
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| 基金项目： | 国家创新研究群体科学基金资助项目(50721062);;国家973计划资助项目(2007CB607606) |
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| 摘 要： | 采用萃取法制备了油酸修饰的纳米CaF2,用X射线衍射(XRD)对纳米CaF2粉体样品进行物相分析,同时用透射电子显微镜(TEM)及傅立叶变换红外光谱仪(FT-IR)进行表面形貌和成分分析,并在四球摩擦磨损试验机上评价了CaF2在润滑脂中的摩擦学性能.结果表明,制备的纳米CaF2粒径在23 nm左右,油酸以化学吸附的方式吸附在CaF2纳米核表面;作为添加剂油酸修饰纳米CaF2在润滑脂中具有良好的抗磨性能和极压性能,在高载荷时具有良好的减摩性能.SEM,EDS和XPS分析表明在摩擦过程中形成了由CaF2、CaO、氧化铁和有机添加剂所组成的边界润滑膜,从而使OA-CaF2具有良好的摩擦学性能.
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| 关 键 词： | 纳米CaF2 萃取 表面修饰 添加剂 摩擦学性能 |
Preparation and Tribological Properties of CaF2 Nanocluster Capped with oleic Acid as Lithium Grease Additive |
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| WANG Li -bo,WANG xiao -bo and ZHANG Ming.Preparation and Tribological Properties of CaF2 Nanocluster Capped with oleic Acid as Lithium Grease Additive[J].Tribology,2009,29(4):299-305. |
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| Authors: | WANG Li -bo WANG xiao -bo and ZHANG Ming |
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| Abstract: | An oleic acid surface-modified calcium fluoride(CaF2) nanoparticle(OA-CaF2) with average diameter of 23 nm was chemically synthesized using an extraction method.The morphologies and crystalline structures of the powder have been characterized by transmission electron microscopy(TEM) and X-ray diffraction(XRD),while the chemical composition and further information on the structure of the nanoparticles have been characterized by FT-IR.The results showed that surface of CaF2 nanoparticles had been modified by ... |
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| Keywords: | CaF2 nanoparticals extraction surface-modified grease additive tribological properties |
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