公开(公告)号：US10144868B2

公开(公告)日：2018-12-04

申请号：US14551602

申请日：2014-11-24

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： So Hye Cho ,  Seung Yong Lee ,  Khan Sovann ,  Jong Ku Park ,  Sun Jin Kim ,  Ho Seong Jang

IPC: C09K11/77 ,  C09K11/08 ,  H01L33/50 ,  C09K11/55 ,  C09K11/60 ,  C01F17/00 ,  H01L31/055

Abstract: The present invention relates to a novel method for preparing a water-insoluble metal hydroxide, and a use thereof. The water-insoluble metal hydroxide of the present invention is conveniently and efficiently prepared s through the high-temperature heat treatment step two times and the washing step, and thus contains a small amount of an alkali metal and has a high crystallinity and a phase purity. The water-insoluble metal hydroxide of the present invention or metal oxide therefrom exhibits an absorption wavelength at a low wavelength range (for example, 490 nm or less) and a light emitting wavelength at a high wavelength range (for example, from 500 nm or more to less than 1,100 nm). Accordingly, the water-insoluble metal hydroxide of the present invention may be efficiently used in various applications such as a fire retardant, an antacid, an adsorbent and so forth, and may also be doped with another metal ion to be utilized as a raw material for fabricating a catalyst, a fluorescent material, an electrode material, a secondary battery material and the like.