Title:
球状のオルトケイ酸亜鉛系緑色発光蛍光体の製造方法
Document Type and Number:
Japanese Patent JP3875027
Kind Code:
B2
Abstract:
This invention relates to a process for preparing a spherical green-emitting phosphor based on zinc orthosilicate and more particularly, to the process for a zinc orthosilicate-based green-emitting phosphor demonstrating an emission spectrum at visible regions, when excited by electron beam, via a new application of 'the homogeneous precipitation method' comprising the following steps such as i) a solution of tetraethylorthosilicate (TEOS) diluted in ethanol is hydrolyzed to obtain a hydrated silica, ii) said hydrated silica is dispersed together with the solution containing zinc and manganese components, iii) a precipitant selected from oxalic acid and oxalates is added to said dispersed solution together with a basic solution, while precipitating zinc and manganese components, iv) said admixture precipitate, so filtered off and dried, is calcined in the air and reheated under the reducing atmosphere to generate a phosphor powder; hence, the above-described phosphor particle is quite effective in a variety of display fields of industry including PDP, since it has a spherical shape with less agglomeration and homogeneous distribution of manganese, an activator, thus proving superior to the conventional phosphor prepared by the solid state reaction method in terms of brightness.
Inventors:
Jun Ha-Kyung
Somboo Young
Park Hidden
Somboo Young
Park Hidden
Application Number:
JP2000620018A
Publication Date:
January 31, 2007
Filing Date:
May 19, 2000
Export Citation:
Assignee:
KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
International Classes:
C01B33/20; C09K11/08; C09K11/54; C09K11/59; C09K11/64
Domestic Patent References:
| JP59184281A | ||||
| JP6235798A |
Foreign References:
| US3541019 |
Attorney, Agent or Firm:
Kosaku Sugimura
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