New Route to Synthesize Ultra‐Fine Zirconium Diboride Powders Using Inorganic–Organic Hybrid Precursors
New Route to Synthesize Ultra‐Fine Zirconium Diboride Powders Using Inorganic–Organic Hybrid Precursors
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DOI：
10.1111/j.1551-2916.2006.01269.x
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发表时间：
2006-11
影响因子：
3.9
通讯作者：
Y. Yan;Zhengren Huang;S. Dong;D. Jiang
中科院分区：
文献类型：
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作者：
Y. Yan;Zhengren Huang;S. Dong;D. Jiang
以氧氯化锆（ZrOCl 2. 8H 2 O）、硼酸和酚醛树脂为前驱体，分别作为氧化锆、氧化硼和碳源，合成了二硼化锆（ZrB 2）超细粉体。反应在相对低的温度（约1500°C）下基本上完成。合成的粉体具有较小的平均晶粒尺寸（<200 nm）、较大的比表面积（约32 m2/g）和较低的氧含量（<1.0 wt%），这些性能均上级一些市售的ZrB 2粉体。采用热重分析和差热分析研究了ZrO 2-B2 O3-C体系的热力学变化。用透射电镜和扫描电镜对合成粉体的晶粒尺寸和形貌进行了表征。
Ultra-fine zirconium diboride (ZrB2) powders have been synthesized using inorganic–organic hybrid precursors of zirconium oxychloride (ZrOCl2·8H2O), boric acid, and phenolic resin as sources of zirconia, boron oxide, and carbon, respectively. The reactions were substantially completed at a relatively low temperature (∼1500°C). The synthesized powders had a smaller average crystallite size (<200 nm), a larger specific surface area (∼32 m2/g), and a lower oxygen content (<1.0 wt%), which were superior to some commercially available ZrB2 powders. The thermodynamic change in the ZrO2–B2O3–C system was mainly studied by thermogravimetric and differential thermal analysis. The crystallite size and morphology of the synthesized powders were characterized by transmission electron microscopy and scanning electron microscopy.