%0 Journal Article
%A LIU Jian-ping
%A XU Bing-bing
%A XU Zhi-fang
%T Rheological and Tribological Properties of Lithium Grease Containing Nano Silica
%D 2016
%R 10.13190/j.jbupt.2016.04.014
%J Journal of Beijing University of Posts and Telecommunications
%P 71-76
%V 39
%N 4
%X In the article, Lithium greases with different particle sizes and mass concentrations of SiO<sub>2</sub> nanoparticles was fabricated via SG65 three-roll grinder. The tribological properties and rheological properties of different particle sizes and mass concentrations SiO<sub>2</sub> nanoparticales as additives in lithium base greases was investigated via MRS-1J four-ball friction tester and Anton Paar MCR301 rheometer. It is shown that the friction coefficient of grease is lowest and anti-wear performance is best when SiO<sub>2</sub> nanoparticles size is 30 nm and the mass concentration is 4%. Under low and moderate shear rate, the rheological experimental data was fitted and a new grease rheological model was proposed, containing nanoparticals mass concentrations parameter. SiO<sub>2</sub> nanoparticles as additives can improve the thixotropic properties of lithium grease, enhance the anti-shear ability and thermostability of greases.
%U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2016.04.014