Synthesis of Ultra-Fine ZrB2 Powder by Borothermal Reaction under High Heating Rate
2009 ◽
Vol 66
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pp. 77-80
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Keyword(s):
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%.
1976 ◽
Vol 14
(1-2)
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pp. 169-181
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Keyword(s):
2012 ◽
Vol 43
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pp. 23-31
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Keyword(s):
Keyword(s):
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2010 ◽
Vol 36
(2)
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pp. 555-559
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