| 低温反应制备高纯度纳米BN包覆Al2O3和ZrO2粉体 |
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| 引用本文： | 李永利,乔冠军,金志浩.低温反应制备高纯度纳米BN包覆Al2O3和ZrO2粉体[J].高等学校化学学报,2003,24(7):1154-1157. |
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| 作者姓名： | 李永利 乔冠军 金志浩 |
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| 作者单位： | 西安交通大学材料强度国家重点实验室,西安,710049 |
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| 基金项目： | 国家自然科学基金 (批准号 :5 0 0 72 0 17)资助 |
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| 摘 要： | 硼酸和尿素在氮气中于650℃反应,生成t-BN-Al2O3和t-BN-ZrO2纳米包覆粉.IR分析表明,反应产物中含CH2和CN基团的杂质属尿素缩聚的复杂产物,经450℃煅烧即可除去.硼酸和尿素完全反应,得到纯净的纳米复合粉体.BN产率大于99%,在复合粉中的含量与计算值吻合.
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| 关 键 词： | 化学反应 纳米包覆 氧化铝 氧化锆 氮化硼 |
| 文章编号： | 0251-0790(2003)07-1154-04 |
| 收稿时间： | 2002-09-17 |
Preparation of Highly Pure Nano-sized t-BN Coating Al2O3 and ZrO2 Composite Powders by a Low-temperature Chemical Reaction |
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| LI Yong-Li ,QIAO Guan-Jun,JIN Zhi-Hao.Preparation of Highly Pure Nano-sized t-BN Coating Al2O3 and ZrO2 Composite Powders by a Low-temperature Chemical Reaction[J].Chemical Research In Chinese Universities,2003,24(7):1154-1157. |
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| Authors: | LI Yong-Li QIAO Guan-Jun JIN Zhi-Hao |
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| Institution: | LI Yong-Li *,QIAO Guan-Jun,JIN Zhi-Hao |
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| Abstract: | Al2O3 and m-ZrO2 powders with nanometers turbostratic-BN(t-BN) coating were prepared through chemical reaction in nitrogen with boric acid and urea as B source and N source, respectively. t-BN was obtained at 650 ℃ and turned into h-BN by heating the nanocomposite powder at 1 600 ℃ in argon. After being calcined in air at 450 ℃ for 5 h, the semi-finished compounds containing CH2 and CN groups in the reaction products decomposed and the powders were purified. The yield of BN in the composite powders is more than 99%. |
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| Keywords: | Chemical reaction Nano-coating Alumina Zirconia Boron nitride |
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