Method for synthesizing spherical alkali-earth metal oxide homogenous phase mixed powder

Abstract

The invention discloses a method for synthesizing spherical alkali-earth metal oxide homogenous phase mixed powder, belongs to the technical field of inorganic functional materials, and relates to deep mixing technology for high-purity alkali-earth metal oxide powder, in particular to a method for mixing particles for forming a sintering body target for PDP. The method is characterized in that: alkali-earth oxides, hydroxides and carbonates are taken as raw materials; slurry is prepared by controlling the types of the used raw materials, dispersing solvents, surfactants and adhesives and a blending ratio; the properties of the slurry are optimized by adjusting the wet ball milling time, ball milling speed and the ratio of grinding media to materials; and the uniformly mixed spherical-particle powder material is obtained through a spray drying flow. The method has the advantages that: the used raw materials are readily available and no waste is discharged in the whole preparation process, so the method belongs to environmental protection technology; and more importantly, a homogenous phase mixed body is formed by adopting wet mixing and spray drying technology, and has obvious competitive advantages and benefit in the aspects of manufacturing cost, product performance, environmental friendliness and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and relates to the deep mixing technology of alkaline earth metal oxygen-containing compound powder, in particular to an industrial preparation method of spherical alkaline-earth metal oxygen-containing compound homogeneously mixed powder for color plasma TV. Background technique [0002] With the development of flat panel TV industry, the competition between PDP and LCD TV is becoming more and more fierce. In order to meet the requirements of the market, plasma TVs need to improve their competitiveness in two aspects, one is to improve luminous efficiency; the other is to reduce production costs. Around these two basic issues, major companies, research institutes and universities in Japan and South Korea have conducted in-depth research on the working mechanism and structure of the device, the driving circuit and the manufacturing process of the device. But so far, no bre...

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Problems solved by technology

[0003] Therefore, the measures to improve the performance of MgO protective film are mainly concentrated on the mixing technology. At present, the problems are the limitations brought about by expensive equipment, small reaction space, and work cost or technical difficulty. Although some methods have large-scale conditions, But to a certain extent, it still belongs to heterogeneous interparticle mixing, and the efficiency is low; and most of the mixed particles have irregular shapes, which is very unfavorable for the ceramic synthesis of sintered targets for PDP.