【摘要】 DG-1 型高温导热系数测定仪是根据傅立叶单向度平壁导热原理研制成的。该仪器主要由供电系统、单方向加热炉和蒸汽量热装置三部分组成。量热装置的底盘放置隔热环,底盘的上表面设有汽泡发生膜,可以保证通过试材中心测试段的热流能单向而迅速地以汽泡形式传给取热桶。该仪器适于测定耐火、绝热与保温材料的高温导热系数、散热强度和热阻,高温面温度可达 1400°C,测定一种试材的λ值只需1.5～3小时,累计误差小于6.5％。性能稳定,操作方便,便于制造。更多还原

【Abstract】 The developmental work of the DG-1 high temperature therraoconductometer is based on the Forier’ s principle on the monoa’irectional heat conduction in a plate. There are three main parts of the DG-1 thermoconductometer, i. e.,the 5kW AC supply system composed of thermal contro lelements, the monodirec-tional heater with a thermogenic mass made from boron-treated Siliconit and the steam heat measuring device. An insulating ring is inlaid into the base plate of the steam heat measuring divice. The base plate is coaled with a film applicable to vaporization. The multilevel vapor-water separator, mounted in the heat absorber, is used to transfer monodirectionally and promptly the heat flow from the central part of the material tested to the heat absorber in the from of vapor bubbles. This measuring device is available to measure the thermal conductivity at high temperature for such materials as fire-proof ings, insulation and laggings. It can also be used to measure heat-sinking intensity and heat resistance. The temperature to be measured on the material surface can be up to 1400℃.The period of measuring A Values of a kind of material is only 1.5-3.0 hr. The result of measuring Japanese lagging brick has shown that the A value measured by the DG-1 is similar to that measured by the EKO type apparatus made in Japan. The cumulative error of measurement in the measuring range of 0.05-1.36 (kcal/m.h· ℃) is less than 6.5%. The DG-1 HT thermoconductometer has the advantages of being easy to manufacture, convenient to use and stable in performance measurement.更多还原