Infra-red phosphors

Details Infra-red phosphors Infra-red phosphors

1988-05-19

1989-02-21

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014R, 2523016R, 313638, 428690, C09K 1164

Patent

active

048068250

ABSTRACT:
A phosphor comprises a chromium activated alkaline earth aluminate having a hexagonal crystal structure and incorporates divalent europium as a sensitizer. The phosphor may also incorporate one or more of divalent manganese and/or zinc and/or magnesium. Such a phosphor emits in the infra-red.

REFERENCES:
patent: 3294699 (1966-12-01), Lange
patent: 3595803 (1971-07-01), Dugger
patent: 4071465 (1978-01-01), Vodoklys
patent: 4161457 (1979-07-01), Takahashi et al.
patent: 4441049 (1984-04-01), Verstegen et al.
patent: 4524300 (1985-06-01), Rutten et al.
patent: 4719387 (1988-01-01), Catherall
Blasse et al., "Physics Letters", vol. 25A, No. 1, 7/67, pp. 29-30.
Barthem et al., "J. of Lumin." 27, 8/82, pp. 231-235.

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