Accession Number : ADA266852


Title :   Preparation and Investigation of Improved Low Voltage Electron Excitable Phosphors


Descriptive Note : Annual technical rept. May 92-May 93,


Corporate Author : ARMY RESEARCH DEVELOPMENT AND STANDARDIZATION GROUP (UNITED KINGDOM) FPO NEW YORK 09510


Personal Author(s) : Chadha, S S ; Smith, D W ; Vecht, A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266852.pdf


Report Date : May 1993


Pagination or Media Count : 53


Abstract : Recent advances in the area of field emitting arrays point to the possibility of fabricating low voltage variants of the CRT. However, these advances also highlight the lack of suitable low voltage excitable phosphors. The aim of this contract is remedy this situation and to provide suitable phosphors emitting RBG. The problem is being tackled by making either intrinsically or extrinsically conducting phosphors, the latter by the addition of suitably conducting fine particle powders. In addition, the evaluation of phosphors has been possible by acquiring a low voltage demountable CRT system. Thus, far, the results from our experiments have been promising. A bright, pure green emitting phosphors (ZnGa2O4:Mn) and a novel red emitting phosphor (CaTiO2:Pr) have been made. In-house prepared bluish-green emitting ZnO:Zn has been show to be as bright as the commercial ZnO:Zn phosphor. Photoluminescent thin film variants of both ZnO:Zn and ZnGa2O4:Mn have been made using aerosol spray pyrolysis techniques. Therefore, we now have three low voltage phosphors instead of only on available at the start of this contract. Our aims are optimize these phosphors further and to attempt other lattices. Small sealed devices will be made to simulate condition in real FED devices and phosphors will be supplied to any US FED manufacturer.


Descriptors :   *EXCITATION , *ELECTRONS , *LOW VOLTAGE , *PHOSPHORS , CALCIUM , AEROSOLS , PHOTOLUMINESCENCE , FIELD EMISSION , OXIDES , GALLIUM , PRASEODYMIUM , UNITED KINGDOM , EUROPIUM , TITANIUM OXIDES , MANGANESE , FINE GRAINED MATERIALS , PYROLYSIS , SPRAYS , TIN , ZINC , PARTICLES , ARRAYS , THIN FILMS , CONDUCTIVITY , POWDERS


Subject Categories : Radiation and Nuclear Chemistry
      Electrical and Electronic Equipment
      Miscellaneous Materials
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE