The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 2016
Filed:
Feb. 28, 2012
Applicants:
Jae Hyung Lee, Busan, KR;
Ji Hye Kim, Daegu, KR;
BO Hoon Han, Daegu, KR;
IN Chul Jung, Busan, KR;
Inventors:
Assignee:
INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YEUNGNAM UNIVERSITY, Gyeongsangbuk-Do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/10 (2006.01); C04B 35/581 (2006.01); C04B 35/626 (2006.01);
U.S. Cl.
CPC ...
C04B 35/10 (2013.01); C04B 35/581 (2013.01); C04B 35/6261 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/3227 (2013.01); C04B 2235/3865 (2013.01); C04B 2235/656 (2013.01); C04B 2235/6562 (2013.01); C04B 2235/6565 (2013.01); C04B 2235/6567 (2013.01); C04B 2235/661 (2013.01); C04B 2235/762 (2013.01); C04B 2235/77 (2013.01); C04B 2235/78 (2013.01); C04B 2235/80 (2013.01); C04B 2235/81 (2013.01); C04B 2235/85 (2013.01); C04B 2235/96 (2013.01); C04B 2235/9653 (2013.01);
Abstract
Disclosed is a method for preparing polycrystalline aluminum oxynitride having enhanced transparency, and preparing polycrystalline aluminum oxynitride by sintering a powder mixture of AlOand 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.