Sound Velocity and Compressibility in the Liquid Alkaline Earth Metals

1974 ◽  
Vol 52 (19) ◽  
pp. 1847-1851 ◽  
Author(s):  
S. P. McAlister ◽  
E. D. Crozier ◽  
J. F. Cochran
Keyword(s):  
Surface Tension ◽  
Simple Model ◽  
Sound Velocity ◽  
Alkaline Earth ◽  
Empirical Relationship ◽  
Alkaline Earth Metals ◽  
Velocity Measurements ◽  
Melting Points ◽  
Model Calculations ◽  
Experimental Values

Ultrasonic velocity measurements have been made on liquid Mg, Ca, Sr, and Ba to temperatures ~300 °C above the melting points. An empirical relationship between the sound velocity and surface tension is tested and found to hold well for the alkaline earth metals. Simple model calculations of the compressibilities at the melting points are found to be in disagreement with the experimental values.

Thermal Energy Storage and Control

1975 ◽  
Vol 97 (3) ◽  
pp. 893-896 ◽  
Author(s):  
J. Schro¨der
Keyword(s):  
Heat Supply ◽  
Alkaline Earth ◽  
Heat Pipes ◽  
Alkaline Earth Metals ◽  
Melting Points ◽  
High Chemical ◽  
Heat Engines ◽  
High Level ◽  
And Control ◽  
High Chemical Stability

Eutectic fluoride mixtures of alkali and alkaline earth metals posses extremely high thermal storage capacities, and are therefore suitable for space heating as well as for powering heat engines. Their melting points ranging from 449 to 832° C are well adapted to any high level heat supply. The compounds are of high chemical stability and show no corrosive action with stainless steel. In order to make efficient use of the stored heat, good thermal insulation and controllable heat transfer are achieved by a multifoil insulation jacket with a controllable hydrogen filling. For powering engines energy transfer is realized by heat pipes.

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