Process for producing coated europium activated strontium borate

Details Process for producing coated europium activated strontium borate Process for producing coated europium activated strontium borate

1986-08-04

1987-08-04

Morgenstern, Norman

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427157, 427215, 427343, 4273722, 427399, 4274191, 4274192, B05D 506

Patent

active

046845399

ABSTRACT:
A process is disclosed for producing a europium activated strontium borate phosphor having a strontium containing coating. The process involves washing a europium activated strontium borate phosphor with a solution of strontium hydroxide to produce a first washed phosphor followed by removing the first washed phosphor from the resulting wash solution. The first washed phosphor is washed with a wash solution selected from the group consisting of ammonium fluoride in alcohol, ammonium bifluoride in alcohol, and a strontium salt in ammonium hydroxide, followed by removing the resulting second washed phosphor from the resulting wash solution. The second washed phosphor is then heated to produce the coated phosphor.

REFERENCES:
patent: 3314871 (1967-04-01), Heck et al.
patent: 3619265 (1971-11-01), Hammond et al.
patent: 4565948 (1986-01-01), Kimura et al.

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