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摘要: 用R1000激光共聚焦Raman光谱仪研究了高温高压合成棒中的立方氮化硼（cBN）晶体、原材料六方氮化硼（hBN）和催化剂。Raman光谱测量结果表明：伴随cBN晶体生长的散射峰，出现了两条全新的Raman散射峰（约1.088 cm-1和约1.368 cm-1）。该散射峰所对应的物质可能是在高温高压条件下hBN向cBN转变时生成的不完全产物BN的一种新相。这一结果将有助于进一步讨论cBN的生长机理。
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关键词:
- 立方氮化硼（cBN） /
- 六方氮化硼（hBN） /
- Raman光谱
Abstract: cBN crystals, hBN and catalyst were used as raw material, to synthesize cBN crystal block, and the synthesized cBN crystal block was characterized using confocal Raman spectroscopy. Raman spectra show that Raman peak positions, 1.088 cm-1 and 1.368 cm-1, might be induced by a new phase of BN which is an intermediate phase between hBN and cBN. This phase may be an incomplete production of the phase transition from hBN to cBN under high pressure and high temperature (HPHT). These results may be helpful to understand the mechanism of cBN formation under HPHT.-
Key words:
- cBN /
- hBN /
- Raman spectrum
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Taniguchi T, Yamaoka S. Spontaneous Nucleation of Cubic Boron Nitride Single Crystal by Temperature Gradient Method under High Pressure [J]. J Crystal Growth, 2001, 222: 549-557. Nemanich R J, Solin S A, Martin R M. Light Scattering Study of Boron Nitride Microcrystals [J]. Phys Rew B, 1981, 23: 6348-6356. Werninghaus T, Hahn J, Richter F, et al. Raman Spectroscopy Investigation of Size Effects in Cubic Boron Nitride [J]. Appl Phys Lett, 1997, 70: 958-960. Leung K M, Li H, Zou Y S, et al. Structural Analysis of Cubic Boron Nitride Films by Ultraviolet Raman Spectroscopy [J]. Appl Phys Lett, 2006, 88: 241922-241924. Reich S, Ferrari A C, Arenal R, et al. Resonant Raman Scattering in Cubic and Hexagonal Boron Nitride [J]. Phys Rev B, 2005, 71: 205201. Arutyunyan N R, Obraztsova E D, Silly M, et al. Thermal Effects in Raman Spectra of Hexagonal Boron Nitride and Nanotube-Containing Boron Nitride Soot [J]. Phys Stat Sol B, 2006, 2243: 3316-3319. -
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