PDP fluorescent powder slurry relieving or preventing color PDP fluorescent powder from thermal degradation when baking screen

Abstract

The invention relates to PDP fluorescent powder slurry which lightens or avoids colorful PDP fluorescent powder from being deteriorated by the heat of screen baking. The PDP fluorescent powder slurry includes a functional phase, a bonding phase and a carrier phase; the functional phase is the monochromatic body of tricolor PDP fluorescent powder; the bonding phase is an organic resin and the carrier phase is an organic solvent and an accessory ingredient which can completely dissolve the organic resin; the weight contents of Na, K, Fe, Cl, Pb and S in the functional phase, the bonding phase and the carrier phase are less than 100ppm; the thermal decomposition temperature of the organic resin used as the functional phase is less than 350 DEG C and the residual ash after the organic resin is incandesced under the temperature of 420 DEG C is less than 0.1 percent; the residual ash of the organic solvent incandesced under the temperature of 420 DEG C is less than 0.1 percent; the accessory ingredient is added in the carrier phase as well; the thermal decomposition temperature of the carrier phase is less than 350 DEG C and the residual ash of the carrier phaseincandesced under the temperature of 420 DEG C is less than 0.1 percent; thus effectively solving the deterioration problem of the fluorescent powder caused by baking the screen at a high temperature by PDP. The PDP fluorescent powder slurry has excellent bonding performance, lower decomposition temperature as well as residual ash, thereby effectively lightening the deterioration problem of the fluorescent powder caused by baking the screen at a high temperature by PDP.

Description

technical field [0001] The invention belongs to the field of rare earth materials and display technology, and in particular relates to a PDP phosphor slurry for reducing or avoiding thermal deterioration of a color PDP phosphor baking screen. Background technique [0002] As the main carrier of phosphor powder, PDP phosphor paste has an important influence on the coating performance of phosphor paste, coating quality of powder layer, secondary performance of phosphor powder, luminous efficiency of phosphor layer, etc., and directly It is related to the brightness, chromaticity, luminous efficiency, life and other properties of the color PDP, thus affecting the performance of the whole PDP. At present, the production process of color PDP fluorescent screen is as follows: PDP phosphor is first mixed with organic solvent, organic resin or polymer to make phosphor slurry, and then the slurry is coated between the barriers of the rear substrate (that is, screen coating ), red ph...

AI Technical Summary

Problems solved by technology

The existing slurry is directly heated to the calcination temperature when baking the screen, and then kept for a period of time for burning. The rapid temperature rise causes a large amount of heat accumulated inside the PDP phosphor slurry to be unable to be conducted in a short period of time, causing the slurry to occur in the barrier groove. Splash, the phosphor layer is damaged