Synthesis of Ultra-Fine Zirconium Diboride Powders by Polymer Template Method Following by Microwave Sintering

Abstract:

Zirconium diboride (ZrB₂) nanoparticles were synthesized by polymer template method using zirconyl (ZrOCl₂∙8H₂O), boric acid (H₃BO₃), Chitosan and Mannitol (C₆H₁₄O₆) with microwave sintering method. SEM and other analytic methods were used to study the phase composition and the microstructure of the nanoparticles.The influence of the ratio of zirconium to boron and carbon on the purity of ZrB₂ powders, as well as the synthesis temperature and the holding time were studied. Pure ZrB₂ at the molar ratio of C/Zr/B=10/5.2/1 can be obtained. The optimum parameter for microwave sintering is 1320 °C for 1h, which is about 300°C lower than conventional carbonization reduction to obtain ZrB₂ powders. The synthesized powders have small particle sizes (50nm) with nearly spherical morphology.

• Periodical: Key Engineering Materials (Volume 697)
• Pages: 49-53
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.697.49
• Online since: July 2016
• Authors: Qi Huang Deng, Zhi Hui Ding, Xiang Feng Shen, Shi Yu Du, Qing Huang*
• Keywords: Microwave Sintering, Polymer Template Method, Ultra-Fine ZrB₂ Powders

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