Method of making haloapatite phosphors

Details Method of making haloapatite phosphors Method of making haloapatite phosphors

2007-08-14

2007-08-14

Koslow, C. Melissa (Department: 1755)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C252S30140H

Reexamination Certificate

active

10905325

ABSTRACT:
A method of making a haloapatite phosphor having a general formula represented by (Ca(1−x−y)MnxSby)5(PO4)3(F(1−z−y)ClzOy), where 0<x<0.05, 0.004<y<0.01, and 0<z<0.1. is provided. The method involves (a) formulating a blend of ingredients to make the haloapatite phosphor, the ingredients including CaHPO4as a primary source of calcium and phosphorus, (b) partially substituting an amount of an equimolar combination of an ammonium phosphate compound and calcium carbonate for an equal number of moles of CaHPO4in the formulation, (c) combining the ingredients in their formulated amounts to form the blend, and (d) firing the blend to form the haloapatite phosphor. The partial substitution has been found to increase the 100-hour brightness of the haloapatite phosphors.

REFERENCES:
patent: 4446049 (1984-05-01), Pappalardo et al.
patent: 4647399 (1987-03-01), Peters et al.
Mooney et al.,Alkaline Earth Phosphates, Chemical Reviews, vol. 61, No. 5, (1961) 433-462.

Affiliated with

Also associated with

Rating

Method of making haloapatite phosphors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making haloapatite phosphors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making haloapatite phosphors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3835552