Metal Powder Additives in Evacuated-Powder Insulation
The purpose of this paper is to discuss the results of some recent experiments using evacuated powders as insulation for very low temperatures. Particular emphasis is given to the mechanics of radiant heat transfer through evacuated powders to which metal particles of various sizes were added as opacifier s. A powder with an apparent mean thermal conductivity of l,7μw/cm-°K between 300 and 20°K is reported.
KeywordsMetal Powder Radiant Heat Transfer Silica Aerogel Aluminum Powder Radiation Shield
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