3200 ANGSTROM PHOSPHOR.
Quarterly rept. no. 5, 1 Jul-30 Sep 69,
WESTINGHOUSE ELECTRIC CORP BALTIMORE MD AEROSPACE DIV
Pagination or Media Count:
Alterations and improvements in the instrumentation and techniques for phosphor efficiency and life measurements were completed. The efficiency of Zn2SiO4TiO2, settled without ball-milling, was measured and found to be as high as 7. Several methods for breaking up clusters were explored. Of these, dry rolling proved successful producing fine particle size, without impairing the original efficiency even when carried out for as long as 72 hours. By comparison P-16 screens gave initial efficiencies of 3.9 and 3.0. The Ba,Zn2Si4O10Pb system was investigated in detail, and a BaZn ratio of 1.30.7 was found to give an efficient phosphor with a highly satisfactory match to the desired emission spectrum. The Sr,Ca,Zn3Si2O7Pb system was studied extensively and the effects of variations in the mole fractions of the three cations were determined. It was found that Sr-rich compositions with Zn mole fractions near one-third give the shortest peak wavelengths 3300-3350A and the most efficient phosphors. Samples of CaSiO3Tl and SrSiO3Tl were prepared these proved to be very inefficient phosphors. Author
- Electrooptical and Optoelectronic Devices
- Miscellaneous Materials
- Solid State Physics