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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%.

参考文献

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[2] Wei-Ming Guo;Guo-Jun Zhang.Reaction Processes and Characterization of ZrB_2 Powder Prepared by Boro/Carbothermal Reduction of ZrO_2 in Vacuum[J].Journal of the American Ceramic Society,20091(1):264-267.
[3] Luyang Chen;Yunle Gu;Zeheng Yang;Liang Shi;Jianhua Ma;Yitai Qian.Preparation and some properties of nanocrystalline ZrB_2 powders[J].Scripta materialia,20047(7):959-961.
[4] H. Erdem Camurlu;Filippo Maglia.Preparation of nano-size ZrB_2 powder by self-propagating high-temperature synthesis[J].Journal of the European Ceramic Society,20098(8):1501-1506.
[5] Yanli Xie;Thomas H. Sanders Jr.;Robert F. Speyer.Solution-Based Synthesis of Submicrometer ZrB_2 and ZrB_2-TaB_2[J].Journal of the American Ceramic Society,20085(5):1469-1474.
[6] Yongjie Yan;Zhengren Huang;Shaoming Dong.New Route to Synthesize Ultra-Fine Zirconium Diboride Powders Using Inorganic-Organic Hybrid Precursors[J].Journal of the American Ceramic Society,200611(11):3585-3588.
[7] Zhang, Y.;Li, R.;Jiang, Y.;Zhao, B.;Duan, H.;Li, J.;Feng, Z..Morphology evolution of ZrB_2 nanoparticles synthesized by solgel method[J].Journal of Solid State Chemistry,20118(8):2047-2052.
[8] Biyun Yang;Junping Li;Bin Zhao.Synthesis of hexagonal-prism-like ZrB2 by a sol-gel route[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2014:522-528.
[9] Guangyi Ji;Huiming Ji;Minmin Li.Synthesis of zirconium diboride nano-powders by novel complex sol-gel technology at low temperature[J].Journal of Sol-Gel Science and Technology,20141(1):114-119.
[10] 凝胶陈化对ZrB2粉末制备的影响[J].无机材料学报,2014(07):717-721.
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