导热系数

And research shows that high thermal conductivity composite can decrease the temperature difference of underfill between chip and substrate, so that it can improve the temperature distribution of the flip chip, decrease the thermal stress of underfill and increase packaging reliability.

表明高导热系数的底充胶可明显降低在芯片和基板之间的温度差，降低底充胶的热应力，进而提高电子封装的可靠性。

The calculated thermal conductivities of frost are compared with the experimental da...

据此计算的霜层综合导热系数与实验数据符合较好。

Thermal probe ; adsorption refrigeration ; zeolite ; compound adsorbent ; thermal conductivity

热探针；吸附制冷；沸石分子筛；复合吸附剂；导热系数

It possesses properties of low thermal conductivity, low density, high flexility, environment friendly, waterproof, sound insulation and shock absorption, etc., so it can replace traditional unwholesome flexible insulation material s with low insulation property, such as PU, asbestos insulation felt, silicate fiber s , and so on.

具有导热系数低、密度小、柔韧性高、绿色环保、防水等优越性能，同时兼具优越的隔声减震性能，可取代聚氨酯泡沫、石棉保温毡、硅酸盐纤维等不环保、保温性能差的传统柔性保温材料。

Improved in the traditional process foundation has eliminated the dregs and the drying craft, its acteristic to not have the asbestos, the textile fiber distribution to be even, the luster pure white, did not have the lamination, the slag globule few (four offcenter to eliminate dregs), the bulk specific gravity basis use nimble adjustment, the intensity big (including enhancement textile fiber), the elasticity good, mechanical workable.

材质 耐火纤维产地山东东营产品类别阻燃纸产品种类保温网格布导热系数 0.075 等级 1 品牌祥雨使用温度 900-1000 形态纤维状应用范围隔热绝缘耐火产品描述：由精选硅酸铝陶瓷纤维棉为主要原料采用湿法成型工艺制成。

Electrical insulators having high thermal conductivity must be used, but, since most electrical insulators don't conduct heat well, special insulators such as hard anodized aluminum, beryllium oxide, specially filled epoxy resins, sapphire, or diamond must be used to couple junctions to the heat sink.

必须使用高导热系数的绝缘体，因为大多数绝缘体都不能很好地传导热量，所以必须使用硬质阳极化铝、氧化铍、特别填充的环氧树脂、蓝宝石或者金刚石等类的特殊绝缘材料来实现与散热器的接触。

The dissertation designs a new type treble hole concrete block. Through adding the block holes number, its thermal resistance increases, but the coefficient of heat conductivity depresses.

本文研究设计了新的三排孔砌块块型，增加砌块的孔洞数，使之热阻增加，导热系数降低，并对其进行了试验研究。

In order to optimize the design of hot blast stove, a model of heat transfer in chamber of hot blast stove was developed and the software based on the model was established. The effect of the checker thermal characteristics such as thermal conductivity, heat capacity, density etc on the temperature of blast and checkers,the heat accumulation and heat release of checkers was determined.

为优化热风炉设计，建立了热风炉蓄热室内传热过程的数学模型，制作了应用程序软件，探讨了不同的格子砖物性参数，如导热系数、比热容和密度等对格子砖温度场分布、气体温度分布以及格子砖蓄热量和放热量的影响。

A transient thermal coupling model of certain internal combustion engine exhaust valve train was built, transient thermal-field distribution of the valve was simulated, and the effect of the thermal conductivity to the thermal-field was discussed.

通过建立某发动机排气门组瞬态热分析藕合模型，对排气门进行瞬态温度场有限元模拟，并探讨导热系数对气门温度场的影响。

The calculation results show that the temperature of the valve cone changes periodically, leading to thermal stress changes periodically, which is the main reason of the valve cone pit corrosion; the operating temperature of the valve can be reduced by using the higher thermal conductivity materials; at the Same time, 3-D FEM provides a good theoretical basis in the process of the design and improvement for the parts of ICE.

计算结果表明：气门锥面处周期性的温度变化，会导致周期性变化的热应力，是导致气门锥面疲劳点蚀的主要原因；采用较高导热系数的材料可降低气门的工作温度；同时，三维有限元法能为内燃机零部件的进一步设计改进提供很好的理论依据。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。