Luminescent material
AssigneeInternational Business Machines Corporation
InventorJames M. Brownlow
Life of this patent
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Abstract
Luminescent material may be fabricated of silicon dioxide containing as activators approximately up to 1% monovalent copper together with up to approximately 15% aluminum. The material may be in powder form, it may be in glass form or it may be produced by electrolytic ingredient transfer. The material is luminescent in the blue range from 380-580 nanometers.
Claims3
A Cu.sup.+ and Al.sup.+3 activated luminescent material exhibiting emission in the wavelength range of 380 to 570 nanometers with a peak in the blue color range when excited by 245 nanometer mercury light consisting of the fired product of the three following ingredients:
- silicon dioxide in the range of 84.6 to 99.76 mol %
- cuprous oxide in the range of 0.08 to 0.85 mol % and
- Al.sub.2 O.sub.3 in the range of 0.12 to 15 mol %.
A Cu.sup.+ and Al.sup.+3 activated luminescent material exhibiting emission in the wavelengthh range of 380 to 570 nanometers with a peak in the blue color range when excited by 245 nanometer mercury light consisting of the fired product of the four following ingredients:
- silicon dioxide in the range of 80.34 to 94.1 mol %
- cuprous oxide in the range of 0.2 to 0.85 mol %
- Al.sub.2 O.sub.3 in the range of 3.0 to 15.0 mol % and
- B.sub.2 O.sub.3 in the range of 2.0 to 12.0 mol %.
A Cu.sup.+ and Al.sup.+3 activated luminescent glass exhibiting emission in the wavelength range of 380 to 570 nanometers with a peak at 520 nanometers when excited by 245 nanometer mercury light consisting of the fused product of the following five ingredients:
- silicon dioxide in the range of 53.2 to 75.2 mol %
- cuprous oxide in the range of 0.3 to 0.8 mol %
- Al.sub.2 O.sub.3 in the range of 4.2 to 5.1 mol %
- B.sub.2 O.sub.3 in the range of 6.7 to 19 mol % and
- a viscosity adjuster selected from the group of lithium oxide, sodium oxide and potassium oxide in the range of 11.0 to 22.0 mol %.
Dependencies are inferred from the claim text.