考虑环境热损失,建立了单根碳纤维沿轴向的导热方程,得到了碳纤维热参数与交流加热信号的频域特性之间的关系.建立了适用于微细导电线或丝的3ω测试系统.利用3ω方法同时测量了单根碳纤维沿轴向的导热系数和热容.在室温下测量了Pt丝的导热系数和热容,验证了建立的实验系统的合理性,利用该方法测量的直径为7 μm单根碳纤维沿轴向的导热系数和热容分别为84.35 W·m-1·K-1和1.19 MJ·m-3·K-1.给出了实验测量的不确定度分析.建立的实验系统可用于单根碳纳米管或导电纳米线热参数的表征.
参考文献
[1] | Fitzer E;Manocha L M.Carbon Reinforcements and Carbon/Carbon Composites[M].Berlin:Springer-Verlag,1998 |
[2] | L. M. Manocha;A. Warrier;S. Manocha .Thermophysical properties of densified pitch based carbon/carbon materials--I. Unidirectional composites[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(3):480-487. |
[3] | L. M. Manocha;A. Warrier;S. Manocha .Thermophysical properties of densified pitch based carbon/carbon materials--II. Bidirectional composites[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(3):488-495. |
[4] | Gallego NC.;Nysten B.;Issi JP.;Treleaven JW.;Deshpande GV.;Edie DD. .The thermal conductivity of ribbon-shaped carbon fibers[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(7):1003-1010. |
[5] | Cahill D G;Pohl R O .Thermal Conductivity of Amorphous Solids Above the Plateau[J].Physical Review B,35(08):4067-4073. |
[6] | Lu L.;Zhang DL.;Yi W. .3 omega method for specific heat and thermal conductivity measurements[J].Review of Scientific Instruments,2001(7):2996-3003. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%