公开(公告)号：EP1871711A4

公开(公告)日：2013-05-01

申请号：EP06715760

申请日：2006-01-26

申请人： KOREA RES INST CHEM TECH ,  CQV CO LTD

发明人： KANG KWANG CHOONG ,  JO SUNG YUN ,  LIM KWANG SU ,  LEE JUNG-MIN ,  SUH JEONG KWON ,  PARK BYUNG-KI ,  CHANG KIL WAN

IPC分类号： C01F7/34 ,  C01F7/02 ,  C01G9/00 ,  C09C1/40

CPC分类号： C01G9/00 ,  C01F7/02 ,  C01F7/021 ,  C01F7/34 ,  C01P2002/54 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/20 ,  C01P2004/54 ,  C01P2004/61 ,  Y10T428/2982

摘要： 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.

公开(公告)号：EP2980162A4

公开(公告)日：2016-04-13

申请号：EP14776308

申请日：2014-02-14

申请人： CQV CO LTD

发明人： JUNG MYUNG-HO ,  HAN KYUNG-JUN ,  JEONG JAE-IL ,  KANG KWANG-CHOONG ,  CHOI BYUNG-KI ,  LIM KWANG-SOO ,  CHANG KIL-WAN ,  CHOI JAE-SOO ,  LEE BEOM-JAE ,  LEE JUNG-MIN

IPC分类号： C09C1/40 ,  B05D5/00 ,  B05D7/00 ,  C09C1/00 ,  C09C3/06 ,  C09C3/10

CPC分类号： C09C1/0015 ,  B05D5/00 ,  B05D7/5483 ,  C01P2004/20 ,  C01P2004/61 ,  C01P2006/60 ,  C09C1/40 ,  C09C2200/1004 ,  C09C2200/301 ,  C09C2220/10

摘要： Disclosed is a method for manufacturing plate ±-alumina pearlescent pigments and nano-metal coating pearlescent pigments with a large aspect ratio, having excellent reflectivity and capable of expressing various colors