Synthesis of Ultra-Fine ZrB2 Powder by Borothermal Reaction under High Heating Rate

Ge Sun; Hao Wang; Wei Min Wang; Yu Cheng Wang; Zheng Yi Fu

doi:10.4028/www.scientific.net/AMR.66.77

Paper Titles

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Synthesis, Characterization and Electromagnetic Wave Absorption Properties of Z-Type Hexaferrites Prepared by Molten Salt Method
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Carbothermal Reduction and Nitridation Synthesis of γ-AlON Powder under High Heating Rate
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Synthesis of Ultra-Fine ZrB₂ Powder by Borothermal Reaction under High Heating Rate
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Effect of Sintering Temperature on the Properties of Porous Silicon Nitride Ceramics
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Effects of Coated Nano-BN Particles on Microstructure and Properties of BN-AlN Composite
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Erosion Resistance of Al₂TiO₅/Al₂O₃ Composites to Molten Aluminum
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 66Synthesis of Ultra-Fine ZrB2 Powder by Borothermal...

Synthesis of Ultra-Fine ZrB₂ Powder by Borothermal Reaction under High Heating Rate

Abstract:

Ultra-fine zirconium diboride (ZrB2) powders have been synthesized by borothermal reduction reaction, using zirconium oxychloride (ZrOCl2•8H2O) as the precursors of zirconia. The thermodynamic variation in the amorphous ZrO2-B system was studied by thermogravimetric and differential thermal analysis (TG-DTA). The precursors containing amorphous ZrO2 and B were heat-treated under a high heating rate. It is shown that the borothermal reaction can be completed at a relatively low temperature (~950 °C) and short duration (~5 min) under a heating rate of 200 °C/min. The synthesized powders have an average crystalline size of 300 nm with oxygen content less than 2.62 wt%.