Phosphor for electron beam excitation and color display...

Details Phosphor for electron beam excitation and color display... Phosphor for electron beam excitation and color display...

2006-11-21

2006-11-21

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Screen

C313S468000, C252S30160F

Reexamination Certificate

active

07138756

ABSTRACT:
A phosphor, which has less reduction in emission efficiency and is capable of keeping high luminance even when density of an electron beam for exciting the phosphor increases, is provided. As raw materials, Ca3N2(2N), AlN (3N), Si3N4(3N), and Eu2O3(3N) are prepared, and each of the raw materials is weighed so that a mole ratio of each element is, for example, (Ca+Eu):Al:Si=1:1:1, and mixed, then the mixture is held and fired at 1500° C. under the inert atmosphere for three hours, and thereafter ground to produce a phosphor having a composition formula of Ca0.985SiAlN3:Eu0.015

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