In improved apparatus, ampoule of material directionally solidified mounted in central hole of annular heat pipe, at suitable axial position between heated and cooled ends. Heated end held in fixed position in single-element furnace; other end left in ambient air or else actively cooled. Gradient of temperature made to move along heat pipe by changing pressure of noncondensable gas. In comparison with prior crystal-growing apparatuses, this one simpler, smaller, and more efficient.
Moving-Temperature-Gradient Heat-Pipe Furnace Element
NASA Tech Briefs ; 17 , 9
1993-09-01
Miscellaneous
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English
Moving-Temperature-Gradient Heat Pipe: Alternative Concept
Online Contents | 1996
Moving-Temperature-Gradient Heat Pipe for Growing Crystals
Online Contents | 1996