Accession Number : AD0657589

Title :   RESEARCH AND DEVELOPMENT OF CATHODOLUMINESCENT PHOSPHOR WITH HIGH-INTENSITY ULTRAVIOLET EMISSION.

Descriptive Note : Final rept. 1 Aug 64-31 Jan 66,

Corporate Author : NATIONAL CASH REGISTER CO DAYTON OHIO RESEARCH DIV

Personal Author(s) : Gilliland,J. W. ; Ullman,F. G.

Report Date : JUN 1967

Pagination or Media Count : 143

Abstract : The objective of the program was to synthesize a cathodoluminescent phosphor with greatly increased ultraviolet emission efficiency in the spectral region between 350 and 400 nanometers for the purpose of writing on photochromic or Kalvar media. Twenty-nine phosphor compositions were studied in at least a preliminary manner and several of these more extensively. Relative to P-16 powder, sprayed films of calcium magnesium silicate: cerium showed an average writing efficiency on Kalvar nearly ten times greater in a demountable system. Another sprayed film phosphor, BaZn1.9Mg0.1Si2O7:Pb with spectral peak at about 300 nm was shown to be about ten times more efficient than P-16 powder in writing on a spiropyran photochromic film in a demountable system. Demonstration cathode ray tubes were fabricated with the sprayed phosphor films, BaSi2O5:Pb, calcium magnesium silicate: cerium, and Zn2SiO4:Ti, and settled powder P-16 screens incorporated. Phosphors in cathode ray tubes generally were no better than presently available P-16 except for solution sprayed barium silicate: lead activated. This phosphor exhibited a relative writing efficiency four times greater than P-16 phosphor on photochromic film.

Descriptors :   (*CATHODE RAY TUBE SCREENS, PHOSPHORESCENT MATERIALS), (*PHOSPHORESCENT MATERIALS, *ULTRAVIOLET RADIATION), ELECTROLUMINESCENCE, EMISSIVITY, SELECTION, DOPING, CERIUM, LEAD(METAL), FILMS, SILICATES, EXCITATION, SPRAYS, SUBSTRATES, BIBLIOGRAPHIES

Subject Categories : Radiation and Nuclear Chemistry
      Electrooptical and Optoelectronic Devices
      Miscellaneous Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE