用共混挤出法制备导热尼龙(PA)66复合材料,研究了导热填料种类、含量及与玻璃纤维复配对复合材料导热系数的影响。结果表明,在选用的3种导热填料中以Al填充PA66的效果最好;当复合材料中填料粒子用量达到一定含量时,填料之间形成特殊的导热通路,提高复合材料的导热性能;随着填料含量的增加,复合材料的导热性能上升,当Al含量为45%时,复合材料的导热系数为0.778 W/(m·K);玻璃纤维与导热填料的共同作用使体系导热系数有一定提高。

Thermal conductivity PA66 composites reinforced by metal powder and oxide were prepared by blending extrusion method.The effects of filler variety and content,combination use with glass fiber on the thermal conductivity coefficient of composites were studied.The results showed that the composite filled with Al had best thermal conductivity. When the filler content reached a certain amount,the special conduction path could be formed between the filler,which could improve the thermal conductivity of composite.Increasing filler content could improve the thermal properties of composites,and PA66 composites with the thermal conductivity coefficient of 0.778 W/(m · K) was obtained when Al content was 45%.The combination use of glass fiber and thermal conductive filler could enhance the thermal conductivity.

天然气水合物导热系数的研究对于模拟自然界天然气水合物的成藏和天然气水合物勘探、开采具有重要意义。本文介绍了获取天然气水合物导热系数的实验测试和模拟计算方法,分析了气体水合物导热特性、导热机理以及水合物复合体系导热。总结了水合物导热规律,即外界温压条件和晶穴占有率对水合物的导热产生影响,且水合物的导热具有相似的温度压力依赖关系,并呈玻璃体的导热特性。水合物玻璃体导热特性由水合物笼型结构决定,而客体分子的存在强化了水合物导热的玻璃体属性。指出非稳态下天然气水合物导热性能变化研究对分析天然气水合物在常压下的稳定性、确定甲烷水合物等最佳储存温度、从导热角度探讨自保护效应机理等具有重要意义。

The study on gas hydrate thermal conductivity is significant for the gas hydrate reservoirs, exploration and mining. Experimental and measuring technique and modeling method for the gas hydrate thermal conductivity are presented. Thermal conduction features and mechanisms for gas hydrate, as well as thermal conductivity of complex system are reviewed. The thermal conductivity laws of gas hydrate are summarized. The outside thermobaric condition and cage occupancy effect on the gas hydrate heat performance. The thermal conduction of these gas hydrates, with gassy behavior, has similar temperature dependence. The gassy property of the thermal conduction is determined by framework of cage and reinforced by the guest molecules enclosed in the cages. It is figured out that studies on gas hydrates in unsteady-state with thermal properties that vary as a function of time are important. It is benefit to reveal gas hydrate stability under atmospheric conditions, to identify optimal st

对用于高热流密度分布式点热源的散热的预埋热管铝基导热板进行了传热性能试验研究,结合模拟仿真,通过求解导热反问题的方法求得热管导热板的当量导热系数。研究结果表明,采用的热管导热板具有优良的热传导能力,当量导热系数随传输功率的增大而降低,当量导热系数范围为1 100～7 600 W/(m.K)。

In this paper,thermal behavior of heat pipe embedded Al plates used for cooling of high heat flux distributed spot heat source is investigated by experiment.A method of solving inverse problem of conductivity is presented to investigate the effective conductivity of heat pipe embedded Al plates.The results indicate that heat pipe embedded Al plates have very high thermal conductance.The effective conductivity decreases as the heat load increases,its range is 1 100~7 600 W/（m·K）.

应用瞬态热线法导热系数测量装置，测定了含硼炉渣的导热系数。获得了导热系数与温度的关系，及组成对导热系数的影响。在低温区导热系数随着温度的升高而呈直线形式略有增加；在高温区导热系数随着温度的升高而迅速降低。在所研究的组成中，随着碱度R=CaO/SiO2的增加，含硼炉渣的导热系数减少；在碱度R=CaO/SiO不变时，随着MgO含量的增加，含硼炉渣的导热系数增加；随着B2O3含量的增加，导热系数呈现出不规则的变化。为提高含硼炉渣硼的提取率提供了基础数据和依据。

The transient heat wire method was applied to measure the thermal conductivity of the boron-containing slag, and the relationship of thermal conductivity with temperature and composition was obtained. The thermal conductivity increased slightly with the elevation of temperature in the low temperature zone, the thermal conductivity decreased rapidly with the elevation of temperature in the high temperature zone. The thermal conductivity of the boron-containing slag decreased with the increase of R=CaO/SiO2. The thermal conductivity of the boron-containing slag increased with the increase of MgO content when R=CaO/SiO2 was constant. It provided basic data and reference for increasing rate of extraction of the B2O3 bearing slag.

主要综述了高导热率低膨胀加成型硅橡胶及导热填料的研究进展。首先介绍了常见的导热填料及其基本性能，主要包括金属类、氧化物类、氮化物类、碳化物类等；详细描述了各类填料的性能特点，并指出了填料基本性能对导热系数的影响，主要包括填料的比例、尺寸、尺寸分布、形状及填料的表面性质等。其次详细介绍了提高导热系数的基本途径，主要包括导热机理介绍；基体材料研究；研发新型高性能导热填料；进行导热填料表面改性；对硅橡胶成型工艺进行优化等；然后介绍了降低热膨胀系数的一些基本途径，主要包括无机纳米粒子改性等。最后指出了目前该研究领域存在的一些基本问题及解决思路，并对未来的发展方向进行了展望。

Advances in the high thermal conductivity and low expansion rate silicone rubber and thermally con-ductive filler were summarized.First,the common thermally conductive filler and basic properties of thermally conductive filler were introduced,including metals,oxides,nitrides,carbides,etc..And the performance characteristics of various types of thermally conductive filler was described in detail and pointed out the influ-ence of the basic performance of the thermal conductivity on thermal conductivity,including filler ratio,size, size distribution,shape and surface properties of the filler and so on.Followed by a detailed description of the basic ways to improve thermal conductivity were given,including introduction of thermal conductivity mecha-nism;matrix materials research;development of new high-performance thermally conductive filler;conduct thermally conductive filler surface modification;silicone rubber molding process optimization,etc..Then some basic ways to reduce th