摘要:
The steps of weighing, mixing and filling for phosphor powder are followed by the reducing atmosphere treating step wherein treating in a reducing atmosphere is carried out at least once and, after the reducing atmosphere treating step, pulverization, dispersion, water washing and drying and further the oxygen ion implantation treating step wherein oxygen ion implantation and annealing are performed, so that host crystals are restored with respect to oxygen defects.
摘要:
A method for preparing a phosphor having a host crystal comprising an oxide, which comprise steps of weighing, mixing and filling a powder of the phosphor, and thereafter one or more steps of firing the phosphor powder in a reducing atmosphere and, after the last firing in a reducing atmosphere, the step of firing the resultant phosphor in an oxidizing atmosphere, wherein the temperature for the step of firing in an oxidizing atmosphere is preferably 600 to 1000°C; and a plasma display device using a phosphor prepared by the method. A phosphor prepared by the method is reduced in the oxygen vacancy.
摘要:
Disclosed is a plasma display wherein luminance, life and reliability of the PDP are improved by preventing deterioration of the phosphor layers. Also disclosed is a method for producing a phosphor used in such a plasma display. The plasma display comprises a plasma display panel wherein a plurality of discharge cells and phosphor layers (110R, 110G, 110B) of colors corresponding to the respective discharge cells are arranged and the phosphor layers (110R, 110G, 110B) emit light when excited by ultraviolet light. The green phosphor layer (110G) contains a green phosphor composed of Zn2SiO4:Mn, and the ratio of zinc (Zn) to silicon (Si) near the surface is set at the stoichiometric ratio of 2/1. The green phosphor is positively or zero charged.
摘要:
A plasma display wherein all the charges are positive is disclosed which comprises a green phosphor which hardly adsorbs or reacts with water, carbon monoxide, a carbon dioxide gas or a hydrocarbon. A green phosphor layer is made of a green phosphor composed of at least one material selected among those represented by the general formula M1-a(Ga1-xAlx)2O4:Mna (wherein M is Zn, Mg, Ca or Sr); the general formula (Y1-a-yGda)(Ga1-xAlx)3(BO3)4:Tby; the general formula (Y1-a-yGda)(Ga1-xAlx)3(BO3)4:Cey, Tby; the general formula (Y1-a-yGda)BO3:Tby; or the general formula (Y1-a-yGda)3(Ga1-xAlx)5O12:Tby.
摘要:
A plasma display device being prevented from deterioration in the brightness of phosphor layers, and a production method capable of forming phosphor layers constantly and free from nozzle clogging. A production method capable forming green phosphor layers by coating a discharge cell with a green phosphor ink mainly consisting of a green phosphor via a nozzle, at least one of phosphor layers having a green phosphor layer being zero- or positively-charged and containing a green phosphor having a crystal structure of Zn2SiO4:Mn, wherein the green phosphor ink consists of phosphor powder coated with positively-charged oxides and having a crystal structure of Zn2SiO4:Mn and phosphor powder positively charged by pulverizing phosphor powder negatively charged and having a crystal structure of Zn2SiO4:Mn so as to be fractured at crystal planes.