Quantum-theoretical calculation of activation parameters for mass transfer and mass transport processes on ionic crystals (V)
✍ Scribed by Dr. A. Winzer
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 538 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0232-1300
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
A report is given on the calculation of activation parameters for mass transfer and mass transport processes for ionic crystals on a quantum‐theoretical basis. Einstein's model for calculating the internal energy of ionic crystals and the specific heat was extended and applied to the problems of mass transfer and transport, the frequency of the optical phonons and the characteristic oscillation frequencies of the crystals (Einstein frequency, Debye‐frequency) being employed for the calculation. The experimentally determined activation energies of the mass transfer and transport processes were compared with the values calculated on a quantum theoretical basis which resulted in good agreement.