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六方氮化硼的结晶度对合成立方氮化硼的影响

DOI: 10.11858/gywlxb.2011.02.004, PP. 118-122

Keywords: h-BN,结晶度,c-BN,合成

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Abstract:

将3种不同初始结晶度的六方氮化硼(h-BN)分别与Li3N按一定比例混合,在低于立方氮化硼(c-BN)的合成温度和压力条件下,采用高温、高压预处理方式,使3种h-BN的结晶度发生改变。对不同预处理条件下得到的h-BN进行X射线衍射分析,确定了结晶度的变化程度。用不同结晶度的h-BN作为初始原料合成c-BN,观察并分析了h-BN向c-BN转化时微观结构的变化以及h-BN的结晶度对合成c-BN的影响。实验结果表明,结晶度低的h-BN更容易合成c-BN。

References

[1]  Wentorf R H. Synthesis of the Cubic Form of Boron Nitride [J]. J Chem Phys, 1961, 34(3): 809-812.
[2]  Taniguchi T, Watanabe K. Synthesis of High-Purity Boron Nitride Single Crystals under High Pressure by Using Ba-BN Solvent [J]. J Cryst Growth, 2007, 303(2): 525-529.
[3]  Zhou Y P, Yan X W, Du S L, et al. Conversion Behavior of Various Hexagonal Boron Nitrides to Cubic Boron Nitride [J]. Chinese Journal of High Pressure Physics, 1995, 9(1): 5-12. (in Chinese)
[4]  周艳平, 阎学伟, 杜森林, 等. 不同六方氮化硼向立方氮化硼的转化行为 [J]. 高压物理学报, 1995, 9(1): 5-12.
[5]  Xu X W, Zhao H M, Fan H L, et al. Synthesis of cBN from hBN [J]. Journal of University of Science and Technology Beijing, 2001, 23(4): 337-339. (in Chinese)
[6]  徐晓伟, 赵红梅, 范慧俐, 等. 用hBN合成cBN [J]. 北京科技大学学报, 2001, 23(4): 337-339.
[7]  Qiu S Z, Li B X, Zhang X D. Vibrational Spectra Studies on Hexagonal BN Crystal and the Synthesis of Cubic BN [J]. Chinese Journal of High Pressure Physics, 1990, 4(1): 29-35. (in Chinese)
[8]  邱淑蓁, 李伯勋, 张兴栋. 六方氮化硼的振动光谱与立方氮化硼的合成 [J]. 高压物理学报, 1990, 4(1): 29-35.
[9]  Singh B P, Solozhenko V L, Will G. On the Low-Pressure Synthesis of Cubic Boron Nitride [J]. Diamond Relat Mater, 1995, 4: 1193-1195.
[10]  Lorenz H, Orgzall I. Influence of the Initial Crystallinity on the High Pressure-High Temperature Phase Transition in Boron Nitride [J]. Acta Mater, 2004, 52(7): 1909-1916.
[11]  Singh B P, Nover G, Will G. High Pressure Phase Transformations of Cubic Boron Nitride from Amorphous Boron Nitride Using Magnesium Boron Nitride as the Catalyst [J]. J Cryst Growth, 1995, 152(3): 143-149.
[12]  Lorenz H, Orgzall I. In Situ Observation of the Crystallization of Amorphous Boron Nitride at High Pressures and Temperatures [J]. Scr Mater, 2005, 52(6): 537-540.
[13]  Nistor L, Teodorescu V, Ghica C, et al. The Influence of the h-BN Morphology and Structure on the c-BN Growth [J]. Diamond Relat Mater, 2001, 10(3-7): 1352-1356.
[14]  Solozhenko V L, Turkevich V Z. High Pressure Phase Equilibria in the Li3N-BN System: in Situ Studies [J]. Mater Lett, 1997, 32(2-3): 179-184.
[15]  Balint M G, Petrescu M I. An Attempt to Identify the Presence of Polytype Stacking Faults in hBN Powders by Means of X-Ray Diffraction [J]. Diamond Relat Mater, 2009, 18: 1157-1162.
[16]  Thomas J, Weston N E, O'Conner T E. Turbostratic Boron Nitride, Thermal Transformation to Ordered-Layer-Lattice Boron Nitride [J]. J Am Chem Soc, 1963, 84(24): 4619-4622.
[17]  Sachdev H, Strauβ M. Investigation of the Chemical Reactivity and Stability of c-BNP [J]. Diamond Relat Mater, 1999, 8(2-5): 319-324.

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