高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (2): 239.

• 研究论文 • 上一篇    下一篇

镁热还原法制备圆片状氮化硼多晶微粉

王吉林, 潘新叶, 谷云乐   

  1. 武汉工程大学材料科学与工程学院, 纳米材料与新型陶瓷材料研究中心, 武汉 430073
  • 收稿日期:2009-04-17 出版日期:2010-02-10 发布日期:2010-02-10
  • 通讯作者: 谷云乐, 男, 博士, 教授, 主要从事纳米材料与新型陶瓷研究. E-mail: ncm@mail.wit.edu.cn
  • 基金资助:

    湖北省教育厅科学研究计划基金(批准号: Z20081502)资助.

Magnesiothermic Reduction Preparation of Polycrystalline Hexagonal Boron Nitride with Round-flake Morphology

WANG Ji-Lin, PAN Xin-Ye, GU Yun-Le*   

  1. School of Materials Science and Engineering, Nano and Ceramic Materials Research Center, Wuhan Institute of Technology, Wuhan 430073, China
  • Received:2009-04-17 Online:2010-02-10 Published:2010-02-10
  • Contact: GU Yun-Le. E-mail: ncm@mail.wit.edu.cn
  • Supported by:

    湖北省教育厅科学研究计划基金(批准号: Z20081502)资助.

摘要:

采用三氧化二硼(B2O3)、氯化铵(NH4Cl)和镁粉为反应物, 以三氧化二铁(Fe2O3)为催化剂, 利用镁热还原法在700~850 ℃下反应, 制备了氮化硼多晶微粉. X射线衍射(XRD)分析表明, 产物为六方相, 晶格常数a=0.2499 nm, c=0.6682 nm. 产物的红外光谱中在790和1380 cm-1处出现了六方氮化硼的特征吸收峰. 利用扫描电子显微镜(SEM)观察到产物为圆片状颗粒, 平均直径约为0.9 μm, 平均厚度约为100 nm. 讨论了Fe2O3的存在对产物形成的影响.

关键词: 六方氮化硼; 镁热还原; 多晶微粉

Abstract:

Polycrystalline boron nitride(BN) powders were prepared by magnesiothermic reduction of boron oxide(B2O3) and ammonium chloride(NH4Cl) catalyzed with ferric oxide(Fe2O3) at temperatures ranging from 700 to 850 ℃ under ambient pressure. X-ray diffraction(XRD) result shows a hexagonal phase with lattice parameters a=0.2499 nm and c=0.6682 nm. Fourier transform infrared(FTIR) spectroscopy indicates characteristic absorption peaks of hexagonal BN at 790 and 1380 cm-1. Scanning electron microscopy(SEM) reveals that the submicro-polycrystallites have approximately uniform round-flake morphology with an average diameter of about 0.9 μm and an average thickness of about 100 nm. Catalytic formation mechanism of the product was also discussed.

Key words: Hexagonal boron nitride; Magnesiothermic reduction; Polycrystalline powder

TrendMD: