硼砂与氯化铵合成hBN反应机理的研究

赵红梅; 徐晓伟; 李玉萍; 王碧燕

doi:10.11858/gywlxb.2002.04.011

硼砂与氯化铵合成hBN反应机理的研究

doi: 10.11858/gywlxb.2002.04.011

1.
北京科技大学材料科学与工程学院，北京 100083；
2.
北京科技大学应用科学学院，北京 100083

详细信息

通讯作者:
赵红梅

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出版历程
- 收稿日期: 2001-12-12
- 修回日期: 2002-03-02
- 发布日期: 2002-12-05

Reaction Mechanism of Na2B4O7 with NH4Cl in hBN Synthesis

1.
Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
2.
Applied Science School, University of Science and Technology Beijing, Beijing 100083, China

More Information

Corresponding author: ZHAO Hong-Mei

摘要

摘要: 研究了以硼砂、氯化铵为原料在氨气气氛下合成hBN 的反应机理。指出氯化铵在反应中的主要作用是与硼砂反应形成可阻止硼砂颗粒团聚的高熔点膜层；而氨气的主要作用就是提供大量参与反应的NH3分子，增加了反应几率；新生成的hBN则进一步隔离高度熔融的硼砂团粒，防止玻璃相的生成。
- 硼砂 /
- 氯化铵 /
- 六方氮化硼 /
- 合成
Abstract: The reaction mechanism in synthesis of hBN using Na2B4O7 and NH4Cl as the raw materials in the gas of NH3 under high-temperature and pressure was studied. The main function of NH4Cl in the reaction is to form a layer of membrane of high melting-point which can prevent Na2B4O7 particles from assembling. Meanwhile the NH3 gas provides much active molecules at high temperature to increase reaction ratio in the synthesis of hBN, and the newly formed hBN exists as separator stopping the appearance of glass phase.
- Na2B4O7 /
- NH4Cl /
- hBN /
- synthesis

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参考文献(9)

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