Back to results
US 5,395,554 AGranted
Flux for phosphor particle size control
AssigneeE. I. Du Pont de Nemours and Company
InventorsDavid B. Hedden, William J. Zegarski
Life of this patent
Estimating the term…
Abstract
An improved flux for use in preparing X-ray phosphors comprises an alkali metal sulfate, an alkali metal metaborate and, a strontium halide. By varying the concentration of the metaborate and strontium halide in the flux composition, the size and dry bulk density of the phosphor particles and the speed of the phosphor, respectively, can be controlled. Also disclosed is a process of making phosphors using the above flux, and X-ray intensifying screens containing such phosphors.
Claims4
A flux composition for use in the manufacture of phosphor particles, comprising:
- a) 1-98% by weight of at least one alkali metal sulfate;
- b) 1-98% by weight of at least one alkali metal metaborate;
- and
- c) 1-50% by weight of at least one strontium halide, the % by weight of a, b and c being based on the total weight alkali metal sulfate, alkali metal metaborate and strontium halide in the flux composition.
1 more element
Dependencies are inferred from the claim text.