低温热导率,Low temperature thermal conductivity
1)Low temperature thermal conductivity低温热导率
1.Measurement of low temperature thermal conductivity of pure Cu with helium refrigerator用氦制冷机测量纯铜低温热导率
英文短句/例句
1.Thermal conductivity measuring equipment of adiabatic material at low temperature非金属绝热材料低温热导率测试装置
2.PTC Thermistors with Low Resistivity at Room Temperature低室温电阻率正温度系数热敏电阻器
3.The greatest dependence upon temperature is shown by rocks with high conductivities at room temperature e. g. salt.在室温度下，高热导率岩类（如盐类）的热导率对温度的反应最大。
4.Analysis of residual strain for Nb_3Sn superconducting strand in low temperatureNb_3Sn超导线低温下残余热应力分析
5.The susceptibility, which is small, falls as the temperature is lowered.导磁率很小，随着温度的降低将变得更
6.Study on the Low-temperature Sintering of High-permeability NiZn Ferrites;高磁导率NiZn铁氧体的低温烧结研究
7.Its density, water adsorption, coefficient of heat conducting and the coefficient of steam pervasion are all lower than those of other board heat preservasion materials.其密度、吸水率、导热系数及蒸汽透系数等方面均低于其它类型的板状保温材料。
8.Thermal wind sensor fabricated on low thermal conduction substrate低热导率衬底的热风速风向传感器研究
9.Research of Semiconductor Thermoelectric Generator in Low-grade Heat Energy and Small Temperature Difference;低品位热源半导体小温差发电器性能研究
10.Continuous Dependence on Spatial Geometry for Low Temperature Heat Conduction;低温热传导方程组解对区域扰动的连续依赖性
11.Development of a Double-guarded Hot Plate Thermal Conductivity Coefficient Measuring Instrument in Low Temperature;低温双平板保护法导热系数测定仪的开发
12.Experiment Study on Thermal Conductivity of Nanofluids for Cryogenic Cool Storage;低温相变蓄冷纳米复合流体导热系数实验研究
13.R&D of Low Temperature Superconducting Wire for ITER国际热核聚变(ITER)用低温超导线研究进展
14.Development of the Instrument of Fast Temperature Difference Measurement Applied in Testing Thermal Conductivity;用于热导率测试的快速温差测量仪的研制
15.Investigation of lower hybrid current drive efficiency based on hot conductivity theory利用热电导理论研究低杂波电流驱动效率
16.Thermal Conductivity of PE-LLD/CF Composite线形低密度聚乙烯/碳纤维复合材料的热导率
17.The thermal insulation material with ultra-low thermal conductivity made by using fiber felt to compound with SiO_2 aerogels and ambient pressure drying纤维毡复合SiO_2气凝胶常压干燥法制备超低导热系数保温隔热材料
18.The anisotropy of the thermal conductivity is essentially independent of the temperature not up to 200-300 C.如果温度不超过200-300℃，则热导率的各向异性现象基本上与温度无关。
相关短句/例句
effective thermal conductivity at low temperature有效低温热导率
1.The measuring method ofeffective thermal conductivity at low temperature of spacer material for multi-layer thermal insulation,such as fiberglass cloth and thermal insulation paper,have been given.叙述了多层绝热的间隔材料玻璃纤维布、隔热纸的有效低温热导率测试方法,为薄层材料的有效低温热导率测试提供了一种方法,并对测试结果和影响因素,如叠层密度和层密度等进行了讨论分析。
3)low transmit heat of the rate低导热率
4)Low thermal conductivity低热导率
5)cryogenic conduction vibration damper低温导热减震器
6)high intensity and low heat conductivity高强度低导热率
延伸阅读
焦炭热导率焦炭热导率thermal conductivity of cokejiaotall redaofU焦炭热导率(thermal eonduetivity of coke):热量从焦炭的高温部位向低温部位传递时，单位距离上温差为1K的传热速率。焦炭热导率、一黑，w/(m·K)，式中J为高温点与低温点间的距离，m;dt为高温点与低温点间的温度差，K;dQ为传热速率，J/s。与此有关的热扩散率a，可根据热导率几和比热容。(kJ/(k:.K))确定，即。一而奈二，mZ/S，式中。 一IUUU户c为密度，kg/m，。测量方法散状固体可燃矿物的热导率和热扩散率，可在实验室装置中同时测量。通常是将定量试样放在中心装有电阻加热丝的圆筒形容器内，以一定的速度升温。试样中沿圆筒半径方向装有两根温差热电偶，用来测出加热过程中这两个测温点的温度差，再据测温点离中心的距离计算出被测试样的热导率和热扩散率: 几一““n会〔2互(、、‘一“，，〕一 b/。。__。_尹，、“一志(沪，一尹‘一”R褪”才)式中q。为内部加热器传给被测试样的热流，J/(m·s);:，和，:为两个测温点离容器中心的距离，m;曳为内部加热器关闭时，;和::处两点的温度差，K;望为内部加热器接通时相应的温度差;b为加热速度，K/s;R为圆筒容器的内半径，m口焦炭的热导率和热扩散率苏联阿格罗斯金(A.A.Ar矽C阴。)曾用上述方法测出工业粉焦试样的热导率和热扩散率与温度(犷，K)的如下关系式:久二0.2+0.325X10一3(T一273)+l.42X10一”少3，w/(m·K)t簇550℃时，a二27.15xio一吕，mZ/st>550℃时，a二27.15X10一“+4.85又10一’3(，一 823)2，mZ/s焦块由于存在复杂的裂纹和气孔，其热导率与粉焦不同，不仅与焦炭材料的导热能力有关，而且与裂纹和孔隙中气体的对流和辐射传热以及热流方向有关。室温下焦块的热导率大致为0.58一。.slw八m·K)，并随温度的升高呈近似直线地增加。焦炭的热导率和热扩散率随视密度和灰分的增加、气孔率的降低以及裂纹的减少而增大。原料煤的煤化度提高时，因含碳量增加，所制得焦炭的热导率和热扩散率也增高。煤结焦过程中的热导率和热扩散率煤结焦过程中测得的热导率和热扩散率受热解的热效应、气孔和裂纹中气体的辐射，以及胶质体状态下的对流等综合因素的影响。因此，所测得的热导率和热扩散率称作有效热导率和有效热扩散率。干燥无灰基挥发分Fdaf为25一相%的煤，结焦过程中热导率和热扩散率随温度升高而改变的特征如图1所示。
