Method of producing green fluorescent powder

Abstract

The invention provides a method for preparing green emitting phosphor. In the method, burnt green emitting phosphor is cleaned; after the burnt green emitting phosphor is dispersed, the surface of the green emitting phosphor is treated; silicon dioxide is added to the surface treated phosphor powder; the mixture of the phosphor powder and the silicon dioxide is coated; the processed phosphor powder is dehydrated and dried; the dried phosphor powder is screened. The cathode-ray tube used green emitting phosphor can increase the residue of the phosphor powder at the skirt, which is effective for controlling cathode-ray tube aluminium backing bubbles or turned-up edges.

Description

A kind of preparation method of green fluorescent powder Technical field: The invention relates to a method for preparing fluorescent powder for color picture tubes and displays, in particular to a method for preparing green fluorescent powder for cathode ray tubes. Background technique The green phosphor powder used in cathode ray tubes is now commonly used in the production process including washing, dispersing, surface treatment, dehydration, drying, and powder screening for the fired phosphor powder. Some phosphor powders are produced after surface treatment, and now The dehydration in the production of phosphor powder is generally carried out by a dehydrator using the principle of centrifugal force. These production processes can produce phosphor powder suitable for cathode ray tubes, but the existing production technology has certain shortcomings, because the fluorescence The dispersant used for powder dispersion is general-purpose polycarboxylate sodium salt. At the...

AI Technical Summary

Problems solved by technology

The present invention mainly aims at the problem of aluminum film bubbles or flanging of aluminum film due to the small residual skirt of green fluorescent powder used in the prior art, and provides a preparation method of green fluorescent powder. The green fluorescent powder obtained according to the preparation method of the present invention Phosphor powder can increase the skirt residue of phosphor powder and solve the problem of aluminum film bubbles or aluminum film flanging