THE CONDENSATION COEFFICIENT OF ALN.
Abstract
The condensation coefficient of AlN was measured by following the rate of exchange is isotopic N2 gas (N15) with AlN14(s) and that of N2 gas (N14) with AlN15(s) using a time-of-flight mass spectrometer. The isotopic N2 gas (N15) was generated by decomposing AlN15(s) in the same Knudsen effusion cell in which the exchange measurements were carried out. Thus, the gas and the substrate were at exactly the same temperature. The condensation coefficient beta is defined as that fraction of gas molecules hitting the surface which undergoes an exchange reaction with the solid. In the temperature range 1800-1900 K, beta = 0.005.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1965
- Accession Number
- AD0480799
Entities
People
- D. Ramakrishnan
- M. Hoch
Organizations
- University of Cincinnati