| 纳米铝的低温热容及其热力学性质 |
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| 引用本文： | 岳丹婷,吕欣荣,谭志诚,董丽娜,YUE Dan-ting,Lü Xin-rong,TAN Zhi-cheng,DONG Li-na.纳米铝的低温热容及其热力学性质[J].大连海事大学学报(自然科学版),2005,31(4):99-102. |
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| 作者姓名： | 岳丹婷 吕欣荣 谭志诚 董丽娜 YUE Dan-ting Lü Xin-rong TAN Zhi-cheng DONG Li-na |
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| 作者单位： | 中国科学院,大连化学物理研究所,辽宁,大连,116023;大连海事大学,轮机工程学院,辽宁,大连,116026;大连海事大学,轮机工程学院,辽宁,大连,116026;中国科学院,大连化学物理研究所,辽宁,大连,116023 |
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| 摘 要： | 用扫描电子显微镜测定了纳米铝试样的粒径，结果表明Al试样平均粒径为18nm，在温度108～385K，用精密低温绝热量热计测定了Al的等压摩尔热容，拟合出其等压摩尔热容与热力学温度的函数关系式．根据热容与热力学温度的函数关系，计算了以298．15K为基准的纳米Al热力学函数，并与粗晶Al热容进行比较，从能量角度分析了不同粒径Al热容差别产生的原因。
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| 关 键 词： | 纳米铝 低温热容 热力学函数 |
| 文章编号： | 1006-7736（2005）04-0099-04 |
| 收稿时间： | 2005-03-11 |
| 修稿时间： | 2005-03-11 |
Low-temperature heat capacity and thermodynamic functions of nano Al |
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| YUE Dan-ting,TAN Zhi-cheng,DONG Li-na.Low-temperature heat capacity and thermodynamic functions of nano Al[J].Journal of Dalian Maritime University,2005,31(4):99-102. |
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| Authors: | YUE Dan-ting TAN Zhi-cheng DONG Li-na |
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| Institution: | 1. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023,China; 2, Marine Eng, College, Dalian Maritime Univ. , Dalian 116026,China |
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| Abstract: | The size of nano AI powders was determined to be 18 nm averagely in diameter by SEM. The isobaric molar heat capacity Cp of the nano AI was measured with high precision adiabatic low-temperature calorimeter in temperature range from 108K to 385 K. The relationship of Cp with temperature T was established. The thermodynamic functions of the nano Al, relative to the standard temperature of 298.15 K, were derived based on the heat capacity data through thermodynamic relationship. The measured Cp values were compared with those of coarse crystal powders and 18 nm AI powders cited from literature and the difference between the Cp curves was analyzed from the viewpoint of energy. |
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| Keywords: | nano AI low-temperature heat capacity thermodynamic functions |
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