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High temperature thermal conductivity of ceramic fibers

机译：陶瓷纤维的高温导热系数

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摘要

The ceramic fibers VK-60, ABK, and VK-80 produced by steam blowing and nozzle dissemination methods have been investigated for the effect of nonfibrous material content, pressure, and temperature on the thermal conductivity at ambient and higher temperatures. It was noticed that with an increase in the aluminum content of the ceramic fibers the thermal conductivity of the material decreased while the insulation properties improved. The VK-80 fibers have the lowest and the VK-60 fibers the highest value of thermal conductivity at ambient temperature. At ambient temperature, the value of thermal conductivity increased with an increase in pressure for all analyzed fibers. ABK fibers showed the least increase and VK-80 registered an increase of about 10% in the values of thermal conductivity for pressures ranging from 0.6 to 6.6 kN/m{sup2}. However, beyond a pressure of 6.6 kN/m{sup}2, the thermal conductivity of all samples increased. To assess the insulation properties of investigated fibers, the thermal conductivity was measured at different temperatures up to 800 ℃. From the obtained results, it was concluded that all three types of fibers have a good potential for future applications, showing good performance in the investigated temperature range.
机译：已经研究了通过蒸汽吹送和喷嘴扩散方法生产的陶瓷纤维VK-60，ABK和VK-80，以了解非纤维材料含量，压力和温度对环境温度和更高温度下的热导率的影响。注意到随着陶瓷纤维中铝含量的增加，材料的热导率降低而绝缘性能提高。在环境温度下，VK-80纤维的导热系数最低，而VK-60纤维的导热系数最高。在环境温度下，所有分析纤维的热导率值都随压力的增加而增加。在压力范围为0.6至6.6 kN / m {sup2}的情况下，ABK纤维的热导率值增加最少，而VK-80的增加率约为10％。然而，超过6.6kN / m {sup} 2的压力，所有样品的热导率均增加。为了评估所研究纤维的绝缘性能，在高达800℃的不同温度下测量了热导率。从获得的结果可以得出结论，所有三种类型的纤维在未来的应用中都具有良好的潜力，在所研究的温度范围内表现出良好的性能。

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