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在空气环境下，制备了一种二乙基二硫代氨基甲酸与稀土元素镧的配合物（ＥＬａＤＴＣ）．利用四球试验机评价了其在通用锂基润滑脂中的极压和抗磨损性能，并与常用二烷基二硫代磷酸锌（ＺＤＤＰ）进行了对比．结果表明：此类稀土配合物能够显著提高锂基润滑脂的极压性能，且优于ＺＤＤＰ；同时具有良好的抗磨损性能，在添加质量分数为１％时ＥＬａＤＴＣ的抗磨损效果优于ＺＤＤＰ．采用ＸＰＳ对ＥＬａＤＴＣ的极压抗磨机理进行了分析，发现在摩擦过程中，添加于锂基脂中的二乙基二硫代氨基甲酸镧配合物与金属表面发生了摩擦化学反应，形成含有机氮、有机硫、硫酸盐和氧化镧等组分的复杂边界润滑膜，因而呈现出优良的极压抗磨性能．
In the air, a complex of diethyldithiocarbamic acid and lanthanum lanthanum (ELaDTC) was prepared. The four-ball testing machine was used to evaluate its extreme pressure and anti-wear properties in general-purpose lithium grease and compared with the commonly used zinc dialkyldithiophosphate (ZDDP). The results show that the rare earth complexes can significantly improve the extreme pressure performance of lithium-based grease, and is superior to ZDDP; at the same time, it has good anti-wear properties. The anti-wear effect of ELaDTC is better than that of ZDDP when the mass fraction is 1%. The extreme pressure and anti-wear mechanism of ELaDTC was analyzed by XPS. It was found that in the rubbing process, the lanthanum diethyldithiocarbamate complex added to lithium grease had a tribochemical reaction with the metal surface, Nitrogen, organic sulfur, sulfate and lanthanum oxide and other components of the complex boundary lubrication film, thus showing excellent extreme pressure and anti-wear properties.