Combination of band-type and line-type emission phosphors with e

Details Combination of band-type and line-type emission phosphors with e Combination of band-type and line-type emission phosphors with e

1975-03-03

1976-07-06

Miller, Edward A.

Explosive and thermic compositions or charges

Miscellaneous compositions

149 2, 149 21, 2523014R, 2523016R, C06B 4500

Patent

active

039679900

ABSTRACT:
An inorganic fluorescent phosphor consisting of a spotting phosphor and a coding phosphor is employed for tagging purposes, as for example, tagging explosives to provide post detonation information. The spotting phosphor consists of an inorganic fluorescent material which is excited by UV to produce readily detectable band-type emission, but which produces little or no emission at certain excitation wave lengths. The coding phosphor consists of a different inorganic fluorescent material which emits a line-type emission and which fluoresces efficiently at those excitation wave lengths at which the spotting phosphor produces little or no emission. Exemplary spotting phosphors are zinc silicate and calcium silicate activated by manganese, which show no excitation at a UV radiation of 325 nm. Suitable coding phosphors are yttrium vanadate activated by trivalent rare earth ions, such as europium, thulium, erbium, dysprosium or Samarium. This combination of spotters and coding phosphors in cemented phosphor grains employed for tagging purposes enables the quantity of expensive coding phosphors required to be drastically reduced.

REFERENCES:
patent: 3746652 (1973-07-01), Mathers
patent: 3772099 (1973-11-01), Ryan et al.
patent: 3772200 (1973-11-01), Livesay
patent: 3789014 (1974-01-01), Graff et al.
patent: 3897284 (1975-07-01), Livesay

Affiliated with

Also associated with

Rating

Combination of band-type and line-type emission phosphors with e does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Combination of band-type and line-type emission phosphors with e, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combination of band-type and line-type emission phosphors with e will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1531811