发明名称 |
METHOD FOR PREPARING POLYCRYSTALLINE ALUMINUM OXYNITRIDE HAVING ENHANCED TRANSPARENCY |
摘要 |
The present invention relates to a method for preparing polycrystalline aluminum oxynitride having enhanced transparency, and more particularly, to a method for preparing polycrystalline aluminum oxynitride by sintering a powder mixture of Al2O3 and AlN under atmospheric pressure, wherein the content of AlN is set to 17 to 26 mol %, a first sintering is performed at 1,575°C to 1,675°C so as to enable raw-material powders to have a relative density of 95% or higher, and a second sintering is performed so as to enable the raw-material powders to have a higher relative density. According to the present invention, all internal micropores are removed, and thus cubic polycrystalline aluminum oxynitride ceramic having a visible-light transmittance of 70% or higher can be obtained in a short amount of time at a relatively low sintering temperature. |
申请公布号 |
WO2012118315(A3) |
申请公布日期 |
2012.12.20 |
申请号 |
WO2012KR01483 |
申请日期 |
2012.02.28 |
申请人 |
INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YEUNGNAM UNIVERSITY;LEE, JAE-HYUUNG;KIM, JI-HYE;HAN, BO-HOON;JUNG, IN-CHUL |
发明人 |
LEE, JAE-HYUUNG;KIM, JI-HYE;HAN, BO-HOON;JUNG, IN-CHUL |
分类号 |
C04B35/58;C04B35/50;C04B35/645 |
主分类号 |
C04B35/58 |
代理机构 |
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