| 摘要 |
<p>The present invention relates to a doped calcium fluoride and in particular to a calcium fluoride precipitate doped with Eu and to a method for producing such a phosphor. Conventionally techniques such as disclosed in, 'Ion-beam induced white luminescence of calcium fluoride implanted with both Eu and Tb ions', Aono et al, Jpn. J. Appl. Phys. Vol.32 (1993) pp 3851-3853, Part 1, No. 9A, September 1993 (Aono) produce Eu and Tb implanted calcium fluoride (CaF2). However, there are significant disadvantages associated with using the Aono technique such as the duration of manufacture and the quality of the resulting product. Therefore, an embodiment of the present invention provides a calcium fluoride precipitate doped with ions. Preferably, the calcium fluoride precipitate is doped with at least one of a plurality of lanthanide ions, preferably Eu?+2, Eu+3¿, ions of Tb or Dy, or at least one group IIIb ion, preferably, ions of T1. Accordingly, an embodiment of the present invention provides a method for manufacturing a calcium fluoride precipitate, the method comprising the steps of producing a dopant solution using a salt of at least a first dopant and a solvent for that salt; producing a solution of CaCl¿2?; mixing the dopant solution and CaCl2 solution with hydrogen fluoride to produce a calcium fluoride precipitate doped with ions of the first dopant.</p> |
