To provide a zinc oxide solid solution for a blue phosphor comprising a large amount of magnesium forming a solid solution in zinc oxide, to provide a method for producing the solid solution, to provide a blue phosphor stable to ultraviolet light, an electric field and electron beams and having excellent blue light emission characteristics and to provide a method for producing the blue phosphor.
The zinc oxide solid solution comprises Zn, Mg and O and is represented by the general formula: Zn1-xMgxO (wherein, x satisfies 0.05≤x≤0.25). In the blue phosphor, the zinc oxide solid solution is deficient in oxygen and the blue phosphor has the light emission peak in 450-490 nm wavelength region. The method for producing the zinc oxide solid solution comprises a co-precipitation step of mixing a mixed aqueous solution containing the Zn and Mg in a dissolved state at (0.95/0.05) to (0.75/0.25) molar ratio (Zn/Mg) thereof with an organic acid component (e.g. ammonium oxalate) and co-precipitating an organic acid complex salt and a thermal decomposition step of thermally decomposing the resultant organic acid complex salt at 450-1,000°C.
SHOYAMA MASASHI
MURAYAMA MASAKI
TORII YASUYOSHI
| JPH0559359A | 1993-03-09 | |||
| JPS5394283A | 1978-08-18 | |||
| JPS5684367A | 1981-07-09 | |||
| JP2001107041A | 2001-04-17 | |||
| JP2004083652A | 2004-03-18 | |||
| JP2003500515A | 2003-01-07 |