Preparation and Characterization of Ultra-Fine ZrB₂ by Sol-Gel Method

Abstract:

Ultra-fine ZrB₂ powders were synthesized by sol-gel carbothermal processing using zirconium oxychloride (ZrOCl₂.8H₂O), boric acid (H₃BO₃) and sucrose (C₁₂H₂₂O₁₁) as raw materials. Additionally, mannitol was used as cosolvent to obtain a stable high-concentration ZrB₂ sol. Since C₁₂H₂₂O₁₁ can be completely decomposed to carbon, carbon might be accounted precisely for the carbothermal reduction reaction. In the case of C/Zr(mol.)=6.0 and B/Zr(mol.)=3.0, a single phase ZrB₂ without residual ZrO₂ or ZrC was obtained. The photomicrograph revealed a spheres shape morphology with an uniform size distribution.

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 122-125
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.122
• Online since: March 2014
• Authors: Lei Jing, Lei E*, En Yuan Wang, Xin Yue Mi
• Keywords: Carbothermal Reduction, Mannitol, Sol-Gel, Zirconium Diboride

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