Comparison of Experimentally and Theoretically Determined Dipole Concentrations of NaCl:Ca++ Considering Aggregation Phenomena

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Abstract
The equilibrium state of impurity–vacancy dipoles at RT is calculated by means of experimental determined association energies of the different dipole aggregates and of the point charge approximation, respectively. A comparison with experimental results originating in dielectric loss measurements shows a good agreement, especially with the results computed by the experimentally determined energies. It is possible to quench‐in dipole concentrations higher than the equilibrium value by cooling down the samples from 600 °C. But at higher impurity content partially aggregates or precipitates are formed during this cooling process, as a comparison with the Stasiw‐Teltow association theory shows.