Carbothermal Reduction Synthesis of Zirconium Diboride Powders Assisted by Microwave
Carbothermal Reduction Synthesis of Zirconium Diboride Powders Assisted by Microwave
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DOI：
10.4028/www.scientific.net/amr.105-106.203
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发表时间：
2010-04
期刊：
影响因子：
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通讯作者：
Hai Long Wang;Shi Xun Zhang;Deliang Chen;Q. Han;Hongxia Lu;Hongliang Xu;Chang-An Wang;Rui Zhang
中科院分区：
文献类型：
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作者：
Hai Long Wang;Shi Xun Zhang;Deliang Chen;Q. Han;Hongxia Lu;Hongliang Xu;Chang-An Wang;Rui Zhang
采用微波辅助加热的方法，对ZrO 2/B2C/C混合物进行碳热还原硼化，制备了ZrB 2粉末。采用X射线衍射（XRD）、X射线荧光光谱（XRF）、氮气吸附（BET模型）和扫描电镜（SEM）对粉体进行表征。实验表明，过量的B_4C是必要的，碳热反应在较高温度下反应剧烈，在1600 ℃时反应完全。根据计算的表面积，微晶尺寸范围为50-100 nm。在1600 ℃下合成的ZrB_2粉末的最高纯度为99.67wt%。在1600 ℃下合成的ZrB 2粉末的比表面积为18.33 m2/g。温度的波动会影响ZrB_2的纯度，因为它起着副反应的作用。
ZrB2 powder has been prepared through carbothermal reduction boronization of zirconia/boron carbide/carbon mixtures heating assisted by microwave. The powder characteristics were investigated by X-ray diffraction (XRD), X-ray fluorescence (XRF), nitrogen absorption (BET model) and scanning electron microscope (SEM). The experiments indicated that excessive B4C is necessary and the carbothermic reaction reacts severely at a higher temperature and complete at 1600oC. The crystallite size has ranged from 50-100 nm, according to the calculated surface area. Highest purity of ZrB2 powder, which was synthesized at 1600oC, is 99.67 wt%. The surface area of ZrB2 powder synthesis at 1600oC is 18.33 m2/g. Vibration of temperature should affect the purity of ZrB2, as the sub reaction acted.