Affiliation:
1. Institut für Physikalische Chemie der RWTH Aachen, Aachen
Abstract
An optical device based on the Debye-Sears effect is developed to determine the ultrasonic absorption and velocity in molten alkali nitrate + silver nitrat mixtures. RbNO3 + AgNO3 and CsNO3 + AgNO3 are investigated in the total composition range between 480 K and 580 K within a frequency interval from 10 MHz to 35 MHz. In the concentration range of high ultrasonic absorption we find dispersion and a frequency dependent step in the absorption curve caused by relaxation. The relaxation time of the structural relaxation in the molten salt mixtures investigated here is in the order of 10-8 s.
The volume viscosity, the adiabatic constant, and the compressibilities are calculated.
Subject
Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics
Cited by
3 articles.
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1. Ultrasonic Velocity and Absorption in(Li,Ag)NO3, (Na,Ag)NO3,(K,Ag)NO3, (Cs,Ag)NO3, (Li,Rb)NO3, and (Na,Rb)NO3 Melts Measured by the Pulse Transmission Method;Zeitschrift für Naturforschung A;1994-03-01
2. Viscosity of Potassium Nitrate + Silver Nitrate Melt Mixtures;Berichte der Bunsengesellschaft für physikalische Chemie;1988-01
3. Physical Chemistry — Overview and Selected Experiments;Fluid Sciences and Materials Science in Space;1987