Vaporization of cadmium oxide by Knudsen effusion

Journal Article · Sun Jun 01 04:00:00 EDT 1975 · High Temp. Sci., v. 7, no. 2, pp. 126-130

OSTI ID:4124570

Miller, A R

The vaporization of CdO in alumina by Knudsen effusion cells was investigated over the temperature range 1014-1188$sup 0$K. The equilibrium constant for the reaction CdO(s) = Cd(g) + $sup 1$$/$$sub 2$$O$$sub 2$(g) was found to be log K = 10.68 - 19,084/T, and the second-law $delta$$H$$sup 0$$sub 2$$sub 9$$sub 8$ for this reaction calculated by the sigma method was found to be 89.2 +- 3.0 kcal, closely agreeing with the mean third-law $delta$$H$$sup 0$$sub 2$$sub 9$$sub 8$ of 88.9 + 1.0 kcal. It was determined that the vaporization of CdO is congruent with a sublimation coefficient close to unity. (auth)

• Research Organization: New Mexico Inst. of Mining and Tech., Socorro
• NSA Number: NSA-33-009743
• OSTI ID: 4124570
• Journal Information: High Temp. Sci., v. 7, no. 2, pp. 126-130, Journal Name: High Temp. Sci., v. 7, no. 2, pp. 126-130; ISSN HITSA
• Country of Publication: United States
• Language: English

Related Subjects

*CADMIUM OXIDES-- EVAPORATION
360202* --Materials--Ceramics
Cermets & Refractories-- Structure & Phase Studies
EQUILIBRIUM
KNUDSEN FLOW
N50130* --Metals
Ceramics
& Other Materials--Ceramics & Cermets--Properties
Structure & Phase Studies
TEMPERATURE DEPENDENCE
VERY HIGH TEMPERATURE