Transference Numbers of Solid Potassium Chloride with Strontium Chloride, Potassium Oxide, and Sodium Sulfide as Additives

1950 ◽  
Vol 18 (1) ◽  
pp. 74-76 ◽  
Author(s):  
Grete Ronge ◽  
Carl Wagner
1976 ◽  
Vol 38 (1) ◽  
pp. 293-298 ◽  
Author(s):  
Ah Mee Hor ◽  
P. W. M. Jacobs ◽  
K. S. Moodie

The thermoelectric power of single crystals of pure potassium chloride and of potassium chloride containing 107 x 10 -5 mole fraction of strontium chloride has been measured in the temperature range 561 to 693 °C, platinum electrodes being used. The results for pure potassium chloride differ substantially from the value reported by Nikitinskaya & Murin (1955) and show much less experimental scatter. A large potential produced by the crystals in the absence of a temperature gradient in the temperature range 470 to 570 °C is briefly described. From the theory of thermoelectric power proposed by Allnatt & Jacobs (1961) the heat of transport of the cation is found to be 0*99 eV and that of the anion 2 J eV in the temperature range 560 to 690 °C. Reasons are discussed for the failure of the relation proposed by Holtan, Mazur & de Groot (1953), which implies that the sum of the heats of transport should be zero for pure potassium chloride.


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