The spherical calcium borate which was well-distributed nano-particles used as lubricating oil additives had been preparated by neutralization-precipitation method. The composition and surface morphology of samples were characterized by XRD and SEM. The refined oil was produced from a certain percentage of the sample dispersed in lubricating oil. The dispersion and stability of lubricants were characterized by standing observation. The performance of lubrication oil is examined by heavy-duty vehicles and industrial gear oil test. And the results show nano calcium borate additive had good dispersion, stability and anti-wear friction properties.%采用中和沉淀法合成了球型、粒径分布均匀的纳米硼酸钙润滑油添加剂,利用XRD、SEM对其结构组成和表面形貌进行了表征.将添加剂样品均匀分散在润滑油中得到成品油,静置观察考查了润滑油的分散性和稳定性.利用重负荷车辆与工业齿轮油中试验检验了润滑油的的润滑性能.结果表明,纳米硼酸钙添加剂具有良好的分散性、稳定性和抗磨减摩性能.
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