| 摘要 |
<p>A non-stoichiometric polycrystalline phosphor consists of Ya(Vo4)b: Euc or Gda(Vo4)b: Euc, where a + b = 1.00, b is from 0.70-0.96, and c is from 0.04-0.10. The phosphors may be prepared by heating in air at 1200-1500 DEG C. (Gd) or 900-1200 DEG C. (Y), and may be used as the red phosphor in a flourescent lamp or colour television tube. A number of specific examples is given. The corresponding stoichiometric vanadates of Y, Gd or Lu, with Eu or Dy are stated to be known phosphors.</p> |
