Fluorescent material used for PDP and preparation method thereof

Abstract

The invention relates to a fluorescent material used for a PDP and a preparation method thereof and is characterized in that: the general chemical formula of the fluorescent material is M1-xAlyOz:xRe, wherein M represents one or the combination of a plurality of elements of Ba, Mg and Sr, and at least contains Ba; M derives from carbonate or nitrate containing element M; Re represents one of Eu and Mn, wherein the element Eu derives from the nitrate thereof and the element Mn derives from chloride thereof; and x is more than 0.02 and less than 0.5, y is more than 2 and less than 12, and 3y plus 2 is equal to 2z. The invention adopts an internal control coprecipitation method to prepare a precursor of the fluorescent material used for the PDP and then sinter the precursor to obtain the M1-xAlyOz:xRe with good dispersibility, approximate spherical shape and particle size distribution concentrated between 2 Mum and 5 Mum. The method is easy for implementation and suitable for large-scale industrial production, and the obtained product can effectively improve the resolution of PDP display devices to realize high-definition display.

Description

technical field [0001] The invention relates to a fluorescent material for preparing plasma display PDP and a preparation method thereof, in particular to a rare earth-doped aluminate fluorescent material for PDP with good dispersion and particle size distribution concentrated between 2-5um and its preparation method. Background technique [0002] Color PDP has broad market prospects. The color TV production giants NEC, Panasonic, Samsung, and Hitachi are all involved in the research and development and production of this field. Century Shuanghong, a subsidiary of Changhong in China, has also developed PDP panels and put them into production. The color PDP used The three-primary-color fluorescent material excited by vacuum ultraviolet radiation (VUV) is the key to realizing color PDP, so it is of great significance to the research and production of three-primary-color fluorescent material for color PDP. At the same time, color PDP fluorescent materials will become another h...

AI Technical Summary

Problems solved by technology

At present, wet chemical methods are mostly used to synthesize PDP fluorescent materials. Compared with traditional solid-phase synthesis methods, this method of liquid-phase synthesis of precursors is easy to obtain crystals with smaller particle sizes, but the problem is that this is an externally controlled method. Precipitation method, that is, the reaction solution relies on an externally added precipitant to achieve the precipitation of effective reactants

In this way, no matter whether the precipitant is added dropwise or sprayed into the reaction solution or the reaction solution is added dropwise or sprayed into the precipitant, there is an instantaneous contact interface between the precipitant and the reaction solution, resulting in the precipitation between the precipitant and the reaction solution. If the concentration of the solution at the contact surface is too high, it is easy to form a large precipitated crystal nucleus, resulting in insufficient concentration of the particle size distribution of the obtained precursor, which in turn affects the morphology of the PDP fluorescent material and the concentration of the particle size distribution.

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