Accession Number : AD0709204
Title : STUDY OF ZIRCONIUM DIOXIDE WHITE PIGMENT FOR SPACE ENVIRONMENT.
Descriptive Note : Rept. for Jul 67-Sept 69,
Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
Personal Author(s) : Kan ,H. K. Alan ; Champetier,Robert J. ; Erler,Theodore G.
Report Date : 31 JUL 1970
Pagination or Media Count : 49
Abstract : The properties of zirconium dioxide as a stable white pigment (low alpha/epsilon) for space application are investigated. First, the optical absorption of single crystals is studied, leading to the conclusion that a high degree of purity, except for hafnium, is essential for stable white pigment applications. A subsequent pigment preparation study and irradiation experiments with UV and 3-keV protons are described. The ZrO coatings initially have alpha < 0.11 and epsilon = 0.9. Overall radiation stability (UV and proton) is shown to be binder-dependent, with potassium silicate more stable than silicones. Potassium silicate coatings show Delta alpha = 0.06 after 2400 UV equivalent solar hours, and Delta alpha = 0.01 after irradiation with 3-keV H(+) and H2(+) to a fluence of 10 to the 16th particles/sq cm. (Author)
Descriptors : (*ZIRCONIUM OXIDES, PIGMENTS), (*SPACE ENVIRONMENTS, *PIGMENTS), PROTON BOMBARDMENT, DEGRADATION, COATINGS, BINDERS, SILICATES, SILICONES, ULTRAVIOLET RADIATION
Subject Categories : Coatings, Colorants and Finishes
Distribution Statement : APPROVED FOR PUBLIC RELEASE