Add time:08/17/2019         Source:sciencedirect.com

Measurements carried out on bulk samples of apiezon N grease in nylon tubes indicate that the grease behaves as a thermal insulator between 4.2 and 1.4 K, and therefore applications utilizing thick grease coatings to provide thermal contact should be avoided. In addition it was observed that the thermal cycling of glass tubes packed with the grease between 300 and 77 K, under varying conditions of vacuum, can lead to grease column separations which reduce the conductivity further. It is noted that these results may have a bearing on the thermal contact between a heat sink and a small thermometer which has been positioned in a grease hole within the heat sink.

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