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Silver Powders
Kapitza Resistance
Curves for mixtures correspond to the Kapitza resistance measured between sintered silver powder heat exchangers and mixtures, either indirectly through the performance of heat exchangers (G. Frossati), or directly in cells containing helium mixture (H. Godfrin).
Resistance between 700Å silver powders and pure 3He: A good agreement was obtained between measurements by Ahonen, Lounasmaa and Veuro (1978) and by H. Godfrin (PhD Thesis, 1981), shown in the graph.
Source: H. Godfrin, PhD Thesis, 1981. Note: in the graph, “mél” stands for mixtures (mélange in French).
Articles on Silver Powders
The following articles provide information on sintered silver powders and their application to heat exchangers
Effect of boundary condition on Kapitza resistance between superfluid 3He-B and sintered metal, S. Autti, A. M. Guénault, A. Jennings, R. P. Haley, G. R. Pickett, R. Schanen, V. Tsepelin, J. Vonka, D. E. Zmeev, and A. A. Soldatov, Phys. Rev. B 102, 064508 (2020)
https://doi.org/10.1103/PhysRevB.102.064508, ArXiv:
https://arxiv.org/abs/2005.05838
Thermal boundary resistance between liquid helium and silver sinter at low temperatures, A. Voncken, D. Riese, L. Roobol, R. König, F. Pobell, J. of Low Temp. Phys. 105, pages 93–112 (1996),
https://doi.org/10.1007/BF00754629
A Geometry dependent thermal resistance between a saturated dilute 3He - 4He Solution and sintered silver powder, D.J. Cousins, A.M. Guénault, G.R. Pickett, P. Thibault, R.P. Turner, E.N. Smith, C. Bäuerle, Yu.M. Bunkov, S.N. Fisher, H. Godfrin, J. of Low temp. Phys. 101, 259 (1995),
https://doi.org/10.1007/BF00754586
T−3 Temperature Dependence and a Length Scale for the Thermal Boundary Resistance between a Saturated Dilute He3-He4 Solution and Sintered Silver, Cousins, D. & Fisher, S. & Guénault, Anthony & Pickett, George & Smith, E. & Turner, R. Phys. Rev. Lett. 73, 2583-2586 (1994),
https://doi.org/10.1103/PhysRevLett.73.2583.
Properties of sintered submicron copper and silver powders and their relation to low temperature heat exchangers, R. J. Robertson, F. Guillon, J. P. Harrison, Can. J. of Phys. 61, (1983),
https://doi.org/10.1139/P83-023