HIGH-TEMPERATURE MEASUREMENTS OF THE RATE OF UPTAKE OF TEO2 VAPOR BY SELECTED OXIDES
Abstract
In a program for elucidation of the process of formation of radioactive fallout, the rates at which substrate samples of calcium ferrite and of clay loam took up vaporized TeO2 were measured. The rate measurements were made for uptake in air from 900 to 1500C and over a TeO2 partial-pressure range of about 0.0000005 to 0.0002 atm. It was found that the rate of uptake of TeO2 by the calcium ferrite was two to three orders of magnitude faster than the rate of uptake by the clay loam. The rate-controlling process for the uptake of TeO2 by the calcium ferrite was the diffusion of the TeO2 vapor molecules through the air. No unique rate-controlling process was found for the uptake of TeO2 vapor by the clay loam. In this system, the rate seemed to be controlled both by a slow rate of reaction of the TeO2 at the clay loam surface and by the slow diffusion of the condensed TeO2 into the clay loam.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 10, 1968
- Accession Number
- AD0663267
Entities
People
- Charles E. Adams
- Jack T. Quan
- Willim R. Balkwell
Organizations
- Naval Radiological Defense Laboratory