Highly-dispersible boron nitride nanoparticles by spray drying and pyrolysis. Issue 13 (September 2017)

• Record Type: Journal Article
• Authors: Han, Weifang; Ma, Zhiyan; Liu, Shicai; Ge, Chunhua; Wang, Lixia; Zhang, Xiangdong
• Is Part Of: Ceramics international. Volume 43:Issue 13(2017)
• Page Start: 10192
• Page End: 10200
• Publication Date: 2017-09
• Subjects: Spray drying -- Pyrolysis -- High dispersivity -- Boron nitride -- Antifriction; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.05.045
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A spray drying and pyrolysis synthesis route was developed and it successfully prepared boron nitride (BN) nanoparticles with high dispersivity. During the experiment, the extremely rapid drying of the boric acid/urea solution during the spray-drying process resulted in the formation of homogeneous precursors, which was the key for the final pyrolysis synthesis of BN nanoparticles with high dispersibility and uniform diameters (~20 nm). Compared with boron nitride synthesized without using spray drying, the as-prepared BN nanoparticles possess higher specific surface area (145.01 m 2 g −1 ) and larger pore volume (0.41 cm 3 g −1 ). Especially, we used the BN nanoparticles as lubricant and incorporated it into the liquid paraffin (LP). The experiment results show that the LP presents outstanding antifriction properties for a BN content of 1.5 wt%. These results suggest that the h-BN nanoparticles have significant potential applications in the field of tribology.