SYNTHESIS OF THE PHOSPHORESCENT PHOSPHOR OF STRONTIUM BARIUM ALUMINATES

摘要

It relates to a manufacturing process of synthesizing a phosphor of - (referred to as barium aluminate or less ^{strontium), Eu 2 +, Dy 3} + system: _- The invention Sr ₁ represents the yellow-green and cyan light emitting characteristic _x Ba _x Al ₂ O ₄ adding a starting raw material, _{SrCO 3, BaCO 3, Dy 2} O 3, and B ₂ O ₃ as a flux as the activator in the Al ₂ O ₃ as Eu ₂ O _3, to study lubricant to synthesize a fluorescent material by solid-phase reaction. Sintering step of synthesizing a fluorescent substance was heat-treated for 3 hours with 1100~1400 ℃ temperature at 95% Ar + 5% H ₂ in a reducing atmosphere. Ba addition amount is sikyeotgo change in the range of 0.0-1.0 mol, when the amount of Ba was added, the emission wavelength is 0.0-0.4mol yellow-green region, it turns when the light emission wavelength region an area close to the cyan, exceeds 0.5mol. In addition, the more the amount of Ba is increased field intensity of the luminescence and afterglow property represents the most excellent characteristics when the Ba was 0.1 mol was added. As a result of measuring the excitation and emission characteristics of the powder, the excitation spectrum is taking place here in a wide wavelength range of 250 ~ 450 nm, the emission spectrum shows a maximum peak at 480 ~ 520 nm.