Accession Number : AD0672835

Title :   THE CONDENSATION COEFFICIENT OF NIO.

Descriptive Note : Rept. for 1 Feb 67-31 Jan 68,

Corporate Author : CINCINNATI UNIV OHIO

Personal Author(s) : Hoch,M. ; Ramakrishnan,D.

Report Date : MAR 1968

Pagination or Media Count : 47

Abstract : The condensation coefficient of oxygen in NiO was studied using the isotope exchange technique applied earlier for aluminum nitride and boron nitride. Experiments were carried out in a platinum Knudsen cell and in an aluminum oxide Knudsen cell. Using the aluminum oxide Knudsen cell, the condensation coefficient beta for NiO was found to be 0.11 in the temperature range 1700-1750K. Using the platinum Knudsen cell, the exchange coefficient reached an equilibrium value of 0.5 because oxygen exchange also took place on the hot platinum surface. It was found also that NiO exchanges with oxygen in the air very slowly at room temperature. (Author)

Descriptors :   (*NICKEL COMPOUNDS, CONDENSATION), OXIDES, OXYGEN, STABLE ISOTOPES, MASS SPECTROSCOPY, VAPORIZATION, INTERFACES, DISSOCIATION, EXCHANGE REACTIONS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE