| 球磨纳米碳粉的表征和光声光谱 |
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| 引用本文： | 巨新,胡天斗,宫竹芳,苏庆德,熊曹水. 球磨纳米碳粉的表征和光声光谱[J]. 应用基础与工程科学学报, 1996, 0(1) |
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| 作者姓名： | 巨新 胡天斗 宫竹芳 苏庆德 熊曹水 |
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| 作者单位： | 中国科学院高能物理研究所同步辐射室，中国科学院高能物理研究所同步辐射室，中国科学技术大学，中国科学技术大学，中国科学技术大学 北京 100039，北京 100039，合肥 230026，合肥 230026，合肥 230026 |
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| 摘 要： | 用球磨法制备纳米碳粉并进行表征测量,光声光谱的研究指出:随着颗粒尺寸的减小,样品的光声响应减弱,其原因是热扩散过程中的量子尺寸效应,即平均自由程的减小,系统自由度和热振动能的增加。纳米材料高密度晶界的存在也可能对热波产生大的散射,导致热阻增加,使光声信号减弱。
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| 关 键 词： | 光声光谱 XRD 纳米材料 |
Characteristic and Photoacoustic Spectroscopy of Nano-sized Graphite |
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| JU Xin Hu Tiandou. Characteristic and Photoacoustic Spectroscopy of Nano-sized Graphite[J]. Journal of Basic Science and Engineering, 1996, 0(1) |
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| Authors: | JU Xin Hu Tiandou |
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| Abstract: | The characteristic measurement of nanosized carbon powder prepared by milling in Ar gas was carried out. It was observed from photoacoustic (PA) spec-troscopy that the response of PA signal decreased as the particle size of sample decreased because of the quantum size effect in heat diffusion i. e. the shorter average free path, the bigger dimension and vibrational energy of the system. The hea't wave function was affected by the higher boundary density of nano-sized materials. |
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| Keywords: | Photoacoustics spectroscopy. XRD nano-sized material |
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