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用(C2H5)2O·BF3和Li3N苯热合成cBN机理探讨

DOI: 10.11858/gywlxb.2006.01.007, PP. 29-33

Keywords: 苯热法,氮化硼,硼氮化锂,三氟化硼乙醚,氮化锂

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Abstract:

以(C2H5)2O·BF3和Li3N为原料,于苯热条件下合成氮化硼并研究其相变机理。X射线粉末衍射和傅立叶变换红外吸收光谱分析证明,产物中不仅有hBN和cBN物相存在,而且还发现了正交氮化硼(oBN)和锂硼氮的常压相Li3BN2(O)及高压相Li3BN2(T)存在。分析了Li3BN2在高温高压条件下和在苯热条件下对合成cBN催化机制的差异,探讨了Li3BN2在以Li3N和(C2H5)2O·BF3为原料合成BN的催化机制,提出常压相Li3BN2(O)和高压相Li3BN2(T)分别对生成cBN和oBN起催化作用的观点。

References

[1]  Olszyna A, Hrabowska J K, Lisicki M. Molecular Structure of E-BN [J]. Diamond and Related Materials, 1997, 6: 617-620.
[2]  Georg W, Peter G P. A Scientific Approach to Hardness: The Hardness of Diamond and Cubic Boron Nitride [J]. Materials Letters, 1999, 40: 1-4.
[3]  Chen X, Rowe W B, Cai R. Precision Grinding Using CBN Wheels [J]. Int J Machine Tools & Manufacture, 2002, 42: 585-593.
[4]  Cai R, Rowe W B. Assessment of Vitrified CBN Wheels for Precision Grinding [J]. Int J Machine Tools & Manufacture, 2004, 44: 1391-1402.
[5]  Fedotova J A, Fedotov A K, Shishonok N A, et al. Charge States and Distribution of Iron Ions in Polycrystalline Cubic Boron Nitride [J]. Optical Materials, 2003, 23: 71-77.
[6]  Nistor S V, Stefan M, Goovaerts E, et al. Point Defects in Cubic Boron Nitride Crystals [J]. Diamond and Related Materials, 2001, 10: 1408-1411.
[7]  Wang G Z, Zhang X F, Zhang K. Application of CBN and Technical Progress of Mechanical Machining [J]. Industrial Diamond, 2002, 3: 33-36.
[8]  Singhal S K, Park J K. Synthesis of Cubic Boron Nitride from Amorphous Boron Nitride Containing Oxide Impurity Using Mg-Al Alloy Catalyst Solvent [J]. J Crystal Growth, 2004, 260: 217-222.
[9]  He D W, Akaishi M, Tanaka T. High Pressure Synthesis of Cubic Boron Nitride from Si-hBN System [J]. Diamond and Related Materials, 2001, 10: 1465-1469.
[10]  Wang X C, Jia X P, Zhang T C, et al. CBN Synthesis in the System of hBN-Mg and Bonded Water [J]. Diamond and Related Materials, 2003, 12: 57-60.
[11]  Solozhenko V L. New Concept of BN Phase Diagram: An Applied Aspect [J]. Diamond and Related Materials, 1994, 4: 1-4.
[12]  Shi L, Gu Y L, Qian Y T, et al. Synthesis and Morphology Control of Nanocrystalline Boron Nitride [J]. J Solid State Chemistry, 2004, 177: 721-724.
[13]  Hao X P, Cui D L, Shi G X, et al. Low Temperature Benzene Thermal Synthesis and Characterization of Boron Nitride Nanocrystals [J]. Materials Letters, 2001, 51: 509-513.
[14]  Yu M Y, Li K, Lai Z F, et al. Phase-Selective Synthesis of Cubic Boron Nitride in Hydrothermal Solutions [J]. J Crystal Growth, 2004, 269: 570-574.
[15]  Chrenko P M. Ultraviolet and Infrared Spectra of Cubic Boron Nitride [J]. Solid State Communications, 1974, 14(6): 511-515.
[16]  Liu Zh F, Xu X W, Li Y P. Current Status of Research on Synthesizing Cubic Boron Nitride at Lower Pressure [J]. Materials Review, 2000, 14(6): 28-29. (in Chinese)
[17]  刘志甫, 徐晓伟, 李玉萍. 立方氮化硼低压合成研究现状 [J]. 材料导报, 2000, 14(6): 28-29.
[18]  Dong S Y, Hao X P, Jiang M H, et al. The Effect of Reactants on the Benzene Thermal Synthesis of BN [J]. Materials Letters, 2004: 2791-2794.
[19]  Vladimir L S, Vladimir Z T. Kinetics of CBN Crystallization in the Li3N-BN System at 66 GPa [J]. Diamond and Related Materials, 1998(7): 43-46.
[20]  Devries R C, Fleischer J F. The System Li3BN2 at High Pressures and Temperatures [J]. Mat Res Bull, 1969, 4: 433-442.
[21]  Batsanov S S, Kopaneva L J, Lazareva E V. On the Nature of Boron Nitride e-Phase [J]. Propellants, Explosives, Pyrotechnics, 1993, 18: 352-355.

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