东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (1): 93-96.DOI: -

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t-BN的制备和结晶转化行为

袁磊;于景坤;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-01-15 发布日期:2013-06-22
  • 通讯作者: Yuan, L.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金与上海宝钢集团联合资助项目(50274021)

Preparation and crystalline transition behavior of turbostratic boron nitride

Yuan, Lei (1); Yu, Jing-Kun (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-01-15 Published:2013-06-22
  • Contact: Yuan, L.
  • About author:-
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摘要： 以硼酸和尿素为原料,采用两步法于900℃氮气气氛下制备了t-BN(turbostratic boron nitride)粉末.利用XRD分析研究了在不同温度和添加剂含量处理下由t-BN粉末向h-BN粉末的转化行为,利用SEM对粉末颗粒形貌进行了分析,并测定了不同处理条件下粉末的比表面积.研究结果表明:随着温度的升高和添加剂含量的增大,t-BN向h-BN的转化越来越完善,比表面积随着粉末转化的完善而逐渐减小.在1 300℃下得到了良好结晶的h-BN.

关键词: 硼酸, 尿素, t-BN, 制备, 结晶, 转化

Abstract: Turbostratic boron nitride powder was prepared with boric acid and urea used as raw materials in nitrogen (N2) gas flow at 900°C by two-step method. The transition behavior of t-BN to h-BN at different temperature with different additives was investigated by XRD, and SEM was used to analyze the morphologies of t-BN/h-BN powder particles. Specific surface area of the powder was also measured under different conditions. The results showed that the transition of t-BN to h-BN gets better increasingly with temperature rising and more additive contents, but the specific surface area and activity decrease. The well crystallized h-BN was thus obtained at 1300°C.

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