高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (7): 1154.

• 论文 • 上一篇    下一篇

低温反应制备高纯度纳米BN包覆Al2O3和ZrO2粉体

李永利, 乔冠军, 金志浩   

  1. 西安交通大学材料强度国家重点实验室, 西安 710049
  • 收稿日期:2002-09-17 出版日期:2003-07-24 发布日期:2003-07-24
  • 通讯作者: 李永利(1971年出生),男,博士研究生,现从事纳米可加工陶瓷材料的研究.E-mail:lyl-xh@sohu.com E-mail:lyl-xh@sohu.com
  • 基金资助:

    国家自然科学基金(批准号:50072017)资助

Preparation of Highly Pure Nano-sized t-BN Coating Al2O3 and ZrO2 Composite Powders by a Low-temperature Chemical Reaction

LI Yong-Li, QIAO Guan-Jun, JIN Zhi-Hao   

  1. State Key Laboratory for Mechanical Behavior of Materials, Xi′an Jiaotong University, Xi′an 710049, China
  • Received:2002-09-17 Online:2003-07-24 Published:2003-07-24

PDF (PC)

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.

关键词: 化学反应, 纳米包覆, 氧化铝, 氧化锆, 氮化硼

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%.

Key words: Chemical reaction, Nano-coating, Alumina, Zirconia, Boron nitride

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