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:
Jun. 14, 2011
Filed:
Jan. 26, 2006
Jung Min Lee, Daejeon, KR;
Byung Ki Park, Daejeon, KR;
Jeong Kwon Suh, Daejeon, KR;
Kil Wan Chang, Cheongju-si, KR;
Kwang Su Lim, Cheongju-si, KR;
Sung Yun JO, Cheongju-si, KR;
Kwang Choong Kang, Cheongju-si, KR;
Jung Min Lee, Daejeon, KR;
Byung Ki Park, Daejeon, KR;
Jeong Kwon Suh, Daejeon, KR;
Kil Wan Chang, Cheongju-si, KR;
Kwang Su Lim, Cheongju-si, KR;
Sung Yun Jo, Cheongju-si, KR;
Kwang Choong Kang, Cheongju-si, KR;
Korea Research Institute of Chemical Technology, Daejeong, KR;
CQV Co., Ltd., Chungcheongbuk-Do, KR;
Abstract
The present invention relates to a flaky α-alumina crystal and a preparation method thereof. More particularly, the present invention relates to a flaky α-alumina crystal comprising aluminum oxide and zinc oxide, which is prepared by hydrolyzing an aluminum precursor solution containing a water-soluble flux and a zinc precursor solution to obtain a gel mixture and aging, drying, calcining and crystallizing it under a specific reaction condition, and a preparation method thereof. Since the flaky α-alumina crystal of the present invention has a thickness of less than 0.5 μm, an average particle diameter of at least 15 μm and an aspect ratio of at least 50, it is useful as high-quality pearlescent pigment material and filler for ceramic materials.