| 内耗频谱仪的应用及内耗频率峰机理的探讨 |
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| 引用本文： | 张进修,熊小敏.内耗频谱仪的应用及内耗频率峰机理的探讨[J].金属学报,2003,39(11):1127-1132. |
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| 作者姓名： | 张进修 熊小敏 |
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| 作者单位： | 中山大学光电技术与材料国家重点实验室,广州,510275;中山大学物理系,广州,510275 |
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| 基金项目： | 国家自然科学基金19974077,10027001和10004017项目，教育部99055,99055806课题，广东省科技厅99M011007G和2KM01101G课题，广东省基金001246项目，广东省教育厅专项基金，广州市2000-k-004-01课题联合资助 |
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| 摘 要： | 给出了自行研制的内耗频率谱仪的设计思想、工作原理、谱仪所达到的技术指标以及所测得的固体、颗粒物质．悬浮液等的内耗频率谱．从实验结果出发，讨论了内耗频率峰的机理．由颗粒物质或悬浮液加入倒摆的盛液筒后，扭摆系统共振频率升高(可由10^1--10^2Hz量级升至10^3Hz)和内耗频率峰的位置变化，可测得颗粒物质的熵力和组态熵能级的变化．从BaTiO3陶瓷在类二级相变温度时内耗的不稳定性和点阵失稳的相关性等，提出了固体中的内耗频率峰起源于切变振动诱发的晶格失稳和点阵熵的变化的观点．
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| 关 键 词： | 内耗频谱仪 频率内耗峰 组态熵 熵力 点阵失稳 点阵熵 |
| 文章编号： | 0412-1961(2003)11-1127-06 |
| 修稿时间： | 2003年7月8日 |
APPLICATIONS OF APPARATUS OF INTERNAL FRICTION FREQUENCY SPECTROSCOPY AND INVESTIGATION OF MECHANISM OF FREQUENCY INTERNAL FRICTION PEAK |
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| ZHANG Jinxiu,XIONG Xiaomin
State Key Laboratory of Optoelectronic Materials and Technologies,Zhongshan University,Guangzhou.APPLICATIONS OF APPARATUS OF INTERNAL FRICTION FREQUENCY SPECTROSCOPY AND INVESTIGATION OF MECHANISM OF FREQUENCY INTERNAL FRICTION PEAK[J].Acta Metallurgica Sinica,2003,39(11):1127-1132. |
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| Authors: | ZHANG Jinxiu XIONG Xiaomin
State Key Laboratory of Optoelectronic Materials and Technologies Zhongshan University Guangzhou |
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| Affiliation: | ZHANG Jinxiu,XIONG Xiaomin
State Key Laboratory of Optoelectronic Materials and Technologies,Zhongshan University,Guangzhou 510275
Department of Physics,Zhongshan University,Guangzhou 510275 |
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| Abstract: | The scheme and measurement principle of the apparatus of internal friction spec-troscopy are presented. A series and stable frequency peaks of internal friction in granular materials, BaTiO3, VO2 ceramics and Cu, Al metals are observed. However, at the phase transition temperature, BaTiO3 ceramics display instability of internal friction. Mechanism of entropy force, variation of configuration entropy and the instability of lattice induced by shear vibration are proposed to explain the experimental results. |
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| Keywords: | apparatus of internal friction spectroscopy internal friction frequency peak lattice entropy entropy force configuration entropy instability of lattice |
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