发表机构
Kyung Hee University（庆熙大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过拉曼映射等方法，确定了流动N$_2$下Fe-B源生长BN中rBN相关拉曼响应的温度-组分窗口，并揭示生长历史是影响响应的关键动力学变量。
AI 中文摘要
在流动N$_2$下，对Fe-B源上形成的BN产物主要在1250--1400~$^\circ$C、名义B含量1--10~wt\\%范围内进行了研究，以确定rBN相关拉曼特征如何依赖于生长条件和历史。对44种生长条件进行的空间分辨拉曼映射识别出一个受限的温度-组分区域，在该区域内，750--835~cm$^{-1}$范围内的积分rBN相关低频响应$A_{750-835}$与主~1367~cm$^{-1}$ BN带的积分总响应$A_{1367}^{\rm{total}}$同时强烈发展。此外，通过减去对称拟合核心并积分远高波数残差$T_{\rm{high}}^{\rm{far}}$，对~1367~cm$^{-1}$带的不对称高波数延伸进行了量化。独立定义的$A_{750-835}$和$T_{\rm{high}}^{\rm{far}}$响应在整个数据集中表现出强烈的对应关系，支持它们作为互补的rBN相关拉曼观测量的使用。相比之下，$A_{750-835}/A_{1367}^{\rm{total}}$在不同生长条件间系统性变化，表明低频响应的相对突出程度随温度和组分变化，而非通过固定比例追踪整体BN响应。在1350~$^\circ$C下进行的生长持续时间实验进一步表明，该比率也依赖于高温N$_2$停留时间，确立了生长历史作为额外的动力学变量。对选定产物的粉末X射线衍射独立确认了rBN相关堆垛的存在，而二次谐波产生提供了互补的对称性敏感证据。这些结果定义了一个有利于强rBN相关拉曼响应的加工窗口，并引入了一个定量框架，用于追踪与rBN相关BN结构相关的低频和带不对称特征。
英文摘要
BN products formed on Fe--B sources under flowing N$_2$ were investigated primarily at 1250--1400~$^\circ$C over nominal B contents of 1--10~wt\% to determine how rBN-related Raman character depends on growth condition and history. Spatially resolved Raman mapping across 44 growth conditions identified a restricted temperature--composition region in which the integrated rBN-related low-frequency response over 750--835~cm$^{-1}$, $A_{750-835}$, is strongly developed together with the integrated total response of the main $\sim$1367~cm$^{-1}$ BN band, $A_{1367}^{\rm{total}}$. In addition, the asymmetric high-wavenumber extension of the $\sim$1367~cm$^{-1}$ band was quantified by subtracting a symmetric fitted core and integrating the far high-wavenumber residual, $T_{\rm{high}}^{\rm{far}}$. The independently defined $A_{750-835}$ and $T_{\rm{high}}^{\rm{far}}$ responses exhibit a strong correspondence across the full dataset, supporting their use as complementary rBN-related Raman observables. In contrast, $A_{750-835}/A_{1367}^{\rm{total}}$ varies systematically among growth conditions, indicating that the relative prominence of the low-frequency response changes with temperature and composition rather than tracking the overall BN response through a fixed proportionality. Growth-duration experiments at 1350~$^\circ$C further show that this ratio also depends on high-temperature N$_2$ dwell time, establishing growth history as an additional kinetic variable. Powder X-ray diffraction on selected products independently confirms the presence of rBN-related stacking, while second-harmonic generation provides complementary symmetry-sensitive evidence. These results define a processing window favorable for strong rBN-related Raman response and introduce a quantitative framework for tracking both the low-frequency and band-asymmetry signatures associated with rBN-related BN structure.
