以正丙醇锆、乙酸、硼酸和木糖醇为原料,采用溶胶-凝胶法,通过碳热还原反应制备了纳米ZrB2粉末.在反应体系中,木糖醇既提供反应所需的碳,又与硼酸形成了配位化合物.通过对凝胶前驱体粉末进行傅里叶红外光谱以及热重分析,探讨了溶胶-凝胶反应过程对碳热还原反应温度以及凝胶陈化时间的影响.结果表明,引入木糖醇促进了反应过程的进行,湿凝胶无需陈化处理,并且降低了碳热还原温度.当木糖醇与正丙醇锆的摩尔配比为1.4时,使用未经陈化的凝胶前驱体,经1450℃碳热还原即可获得平均直径约50 nm的等轴状ZrB2纳米颗粒,粉体氧含量为1.36wt%.
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