Temperature dependence of steady-state Bragg diffraction in a Ce:Fe:LiNbO3 photorefractive crystal

1995 ◽  
Vol 34 (8) ◽  
pp. 2243 ◽  
Author(s):  
Zhongkong Wu
Keyword(s):  
Steady State ◽  
Temperature Dependence ◽  
Photorefractive Crystal ◽  
Bragg Diffraction

Thermotransport of Noble Metal Impurities in Lead

1972 ◽  
Vol 27 (1) ◽  
pp. 138-140 ◽  
Author(s):  
George A. Sullivan ◽  
Sune Larsson ◽  
Per T. Thernquist
Keyword(s):  
Steady State ◽  
Temperature Dependence ◽  
Noble Metal ◽  
Temperature Gradients ◽  
Electronic Contribution ◽  
Kcal Mole ◽  
Cold Side ◽  
Heat Of Transport ◽  
Metal Impurities ◽  
Significant Temperature

Abstract Steady-state distributions of Au, Ag and Cu tracers in Pb wafers subjected to temperature gradients have been determined. The effective heats of transport were + 5.8 ± 1.1 for Ag, - 0.5 ± 0.3 for Au, and of the order of + 35 for Cu (all in kcal/mole, positive values denoting the impurity migrating to the cold side of the Pb wafer). No significant temperature dependence of the heats of transport could be detected. The results are difficult to reconcile with existing theories of the intrinsic and electronic contribution to the heat of transport.

Non-steady-state measurements of the thermal conductivities of liquid polyphenyls

1963 ◽  
Vol 273 (1353) ◽  
pp. 259-274 ◽  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Expansion ◽  
Steady State ◽  
Temperature Dependence ◽  
Line Source ◽  
Coefficient Of Thermal Expansion ◽  
Liquid Benzene ◽  
Extended Range ◽  
Benzene Toluene ◽  
Effect Of Structure

A line source technique has been developed for non-steady-state measurements of the therm al conductivities of liquids over an extended range of temperature. The accuracy of the method, which is an absolute one, has been critically exam ined. T hermal conductivities of liquid benzene, toluene, diphenyl, o-,m - and^p-terphenyl, estimated to be accurate to + 0*25 % , have been obtained. These results are discussed in terms of the effect of structure on the transport properties of liquids and the relation between the coefficient of thermal expansion and the temperature dependence of thermal conductivity.

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