China Petroleum Processing & Petrochemical Technology ›› 2021, Vol. 23 ›› Issue (4): 83-94.

• Lubrication Research • Previous Articles     Next Articles

Synthesis and Tribological Properties of Sodium-Ion-Exchanged α-Zirconium Phosphate

Tian Chengguang; Zhang Xiaosheng; Xu Hong; Dong Jinxiang   

  1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024
  • Received:2021-04-03 Revised:2021-06-25 Online:2021-12-30 Published:2021-12-30
  • Contact: Dong Jinxiang E-mail:dongjinxiangwork@hotmail.com
  • About author:The first author:Tian Chengguang, Telephone:+86-13700512466; E-mail: 492473545@qq.com Corresponding Author:Professor Dong Jinxiang, Telephone:+86-13700512466; E-mail: dongjinxiangwork@hotmail.com. Professor Xu Hong, Telephone: +86-13620614760; E-mail: xuhongwork@126.com.
  • Supported by:
    the National Natural Science Foundation of China;the National Natural Science Foundation of China;the National Natural Science Foundation of China;the Natural Science Foundation of Shanxi Province

Abstract: Sodium-ion-exchanged α-zirconium phosphate (Na-α-ZrP) was synthesized by using disodium hydrogen phosphate as sodium source, which was an efficient ion exchange way. The tribological properties of Na-α-ZrP as an additive in lithium grease were investigated by a four-ball tester and a SRV tester, respectively. The synergistic effect of Na-α-ZrP with ZDDP also be studied. Results indicate that Na-α-ZrP can effectively improve the antiwear and friction-reducing properties of lithium grease. Combined with ZDDP, grease demonstrated excellent anti-wear performance, especially under high loads. The possible wear mechanism was discussed by observing the worn surface under 3D optical profiler, scanning electron microscope (SEM), energy-dispersive spectrometry (EDS) and X-ray photoelectron spectroscopy (XPS). The simple synthetic method and superior tribological performance make the Na-α-ZrP become a potential choice for lubricant additives.

Key words: sodium-ion-exchanged layered zirconium phosphates, ZDDP, tribological properties