HIGH HEAT-FLUX KAPITZA CONDUCTANCE OF TECHNICAL COPPER WITH SEVERAL DIFFERENT SURFACE PREPARATIONS

被引：22

作者：

KASHANI, A

VANSCIVER, SW

机构：

[1] Univ of Wisconsin-Madison, Applied, Superconductivity Cent, Madison, WI,, USA, Univ of Wisconsin-Madison, Applied Superconductivity Cent, Madison, WI, USA

来源：

CRYOGENICS | 1985年 / 25卷 / 05期

关键词：

COPPER AND ALLOYS - Thermal Conductivity - CRYOSTATS - Applications;

D O I：

10.1016/0011-2275(85)90202-4

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Five different surface preparations were studied: a, polished with 0. 3 mu m alumina powder; b, oxidized at room temperature in air for a period of one month; c, oxidized in air at 200 degree C for 40 min; d, coated with 50-50 PbSn solder; e, coated with a layer of GE7031 varnish. The variation of surface temperature with heat flux as well as the limiting values of Kapitza conductance for small temperature difference are determined. Relative to the polished samples, it is observed that the baked and solder coated samples have higher conductances and that the samples oxidized in the atmosphere show lower conductances. The surface temperature of the varnished samples is controlled mostly by the low thermal conductivity of the varnish.

引用

页码：238 / 242

页数：5

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