Title:
TRIPLE-DOPED POLYCRYSTALLINE TRANSPARENT UPCONVERTING α-SIALON CERAMICS AND METHOD FOR PREPARING SAME
Document Type and Number:
WIPO Patent Application WO/2018/097350
Kind Code:
A1
Abstract:
The present invention relates to transparent α-SiAlON ceramics tri-doped with erbium, thulium, and holmium and a method for preparing the same. The ceramics are characterized in that upconversion occurs at at least one wavelength of 657 nm, 679 nm, and 805 nm when the ceramics are irradiated with light of 980 nm at room temperature. The observed hardness and fracture toughness of sintered α-SiAlON ceramics are higher than those of other commercial optically active polycrystalline transparent ceramics including YAG and Y2O3.
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Inventors:
LEE SOO WOHN (KR)
KSHETRI YUWARAJ (KR)
JEONG SANG HOON (KR)
KIM SEUNG HO (KR)
KSHETRI YUWARAJ (KR)
JEONG SANG HOON (KR)
KIM SEUNG HO (KR)
Application Number:
PCT/KR2016/013581
Publication Date:
May 31, 2018
Filing Date:
November 24, 2016
Export Citation:
Assignee:
IUCF SUNMOON UNIV (KR)
International Classes:
C04B41/50; C04B35/645
Foreign References:
| US4701928A | 1987-10-20 | |||
| KR20120117577A | 2012-10-24 | |||
| US7075707B1 | 2006-07-11 | |||
| US5200374A | 1993-04-06 |
Other References:
LI, BIN: "Upconversion luminescence properties of Er3+/Yb3+ in transparent a-sialon ceramics", OPTICAL MATERIAL, 2015, pages 239, XP055599758, DOI: doi:10.1016/j.optmat.2014.11.034
Attorney, Agent or Firm:
ENVISION PATENT & LAW FIRM (KR)
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