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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Reverse Micro-Emulsion Synthesis of Oxygen-Enriched Low-Friction Boron Nitride/Calcium Borate Microspheres

Songdong Yuan A B C , Canxing Yang A B , Xing Zhu A B , Guodong Jiang A B , Renzhong Huang A B , Jian Xiong A B and Qing Ai A B
+ Author Affiliations
- Author Affiliations

A Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan 430068, China.

B The Synergistic Innovation Center of Catalysis Materials of Hubei Province, Wuhan 430068, China.

C Corresponding author. Email: yuansongdong@aliyun.com

Australian Journal of Chemistry 71(12) 983-989 https://doi.org/10.1071/CH18362
Submitted: 26 July 2018  Accepted: 21 October 2018   Published: 21 November 2018

Abstract

Oxygen enriched boron nitride microspheres (BNOs) coated with nano-sized calcium borate (CB) were synthesised by a reverse micro-emulsion method, in which calcium chloride and sodium borate were selected as the calcium and boron source, respectively. The phase identification and chemical bonding of the composite were confirmed by X-ray driffraction (XRD) and FT-IR spectroscopy. The chemical composition and valence state were determined by X-ray photoelectron spectroscopy (XPS). The morphology and microstructure of the samples were characterised by transmission electron microscopy (TEM) along with surface area analysis. The tribological property of the microspheres as a wear resistance additive in base oil was evaluated by a four-ball tester. The results show that the strawberry-like BNO/CB nanocomposites were fabricated successfully and possess a relatively high friction-reducing and antiwear performance. After the addition of BNO/CB nanocomposites, the friction coefficients of the base oil decreased by 13.3 % while the diameter of the grinding spot decreased by 16.4 %.


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