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A platform for research: civil engineering, architecture and urbanism
MANUFACTURING METHOD OF POLYCRYSTALLINE ALUMINUM OXYNITRIDE WITH IMPROVED TRANSPARENCY
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 Al_2O_3 and AIN under atmospheric pressure, wherein the content of AIN is set from 17 to 26 mol%, a first sintering is performed at 1,575°C to 1,675°C such that a relative density of raw-material powders is equal to or higher than 95%, and a second sintering is performed at 1,900°C such that the relative density of the raw-material powders is increased. According to the present invention, all internal micropores are removed, and thus cubic polycrystalline aluminum oxynitride ceramic having a visible-light transmittance equal to or higher than 70% may be obtained in a short time at a relatively low sintering temperature.
MANUFACTURING METHOD OF POLYCRYSTALLINE ALUMINUM OXYNITRIDE WITH IMPROVED TRANSPARENCY
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 Al_2O_3 and AIN under atmospheric pressure, wherein the content of AIN is set from 17 to 26 mol%, a first sintering is performed at 1,575°C to 1,675°C such that a relative density of raw-material powders is equal to or higher than 95%, and a second sintering is performed at 1,900°C such that the relative density of the raw-material powders is increased. According to the present invention, all internal micropores are removed, and thus cubic polycrystalline aluminum oxynitride ceramic having a visible-light transmittance equal to or higher than 70% may be obtained in a short time at a relatively low sintering temperature.
MANUFACTURING METHOD OF POLYCRYSTALLINE ALUMINUM OXYNITRIDE WITH IMPROVED TRANSPARENCY
LEE JAE HYUNG (author) / KIM JI HYE (author) / HAN BO HOON (author) / JUNG IN CHUL (author)
2015-08-19
Patent
Electronic Resource
Korean
IPC:
C04B
Kalk
,
LIME
Manufacturing Method of Polycrystalline Aluminum Oxynitride with Improved Transparency
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