Title:
AFTERGLOWING ACID SULFIDE FLUORESCENT BODY, AND LUMINESCENT COMPOSITION FOR AUTHENTICATION
Document Type and Number:
WIPO Patent Application WO/2018/211829
Kind Code:
A1
Abstract:
[Problem] To provide a luminescent composition for authentication which contains an afterglowing acid sulfide fluorescent body that is visible for several seconds after excitation, and has afterglow that is difficult to see after several minutes have passed. [Solution] This afterglowing acid sulfide fluorescent body is characterized by being represented by Ln2O2S:Eu,R, where Ln represents at least one element selected from La and Y, and R represents at least one element selected from Tb and Pr. The fluorescent body is visible for several seconds after excitation, and has red afterglow that is difficult to see after several minutes have passed.
More Like This:
Inventors:
HASHIMOTO ATSUNORI (JP)
AOKI YASUSHI (JP)
UEDA JUNPEI (JP)
TANABE SETSUHISA (JP)
AOKI YASUSHI (JP)
UEDA JUNPEI (JP)
TANABE SETSUHISA (JP)
Application Number:
PCT/JP2018/012703
Publication Date:
November 22, 2018
Filing Date:
March 28, 2018
Export Citation:
Assignee:
NEMOTO TOKUSHU KAGAKU KK (JP)
International Classes:
C09K11/84
Foreign References:
| JPH0641528A | 1994-02-15 | |||
| JPS6222888A | 1987-01-31 | |||
| JPH03227395A | 1991-10-08 | |||
| JPS61127670A | 1986-06-14 | |||
| JPS5446183A | 1979-04-11 | |||
| JPS5278783A | 1977-07-02 | |||
| JPH03192787A | 1991-08-22 | |||
| JPH0841454A | 1996-02-13 | |||
| JPS63101480A | 1988-05-06 | |||
| JP2000226577A | 2000-08-15 | |||
| JP2000073053A | 2000-03-07 | |||
| JPH09217061A | 1997-08-19 | |||
| JPH05140554A | 1993-06-08 | |||
| JP2003013059A | 2003-01-15 | |||
| JP2003160786A | 2003-06-06 | |||
| JP2000345154A | 2000-12-12 | |||
| JPS59102981A | 1984-06-14 | |||
| JP2010106213A | 2010-05-13 | |||
| JP2014139260A | 2014-07-31 |
Other References:
DU, S. S. ET AL.: "Effect of calcination temperature on luminescence properties of white long-lasting phosphor Y202S: Tb3+, Eu3+, Mg2+, Ti4+", JOURNAL OF THE CHINESE CERAMIC SOCIETY, vol. 43, no. 4, 2015, pages 471 - 475, ISSN: 0454-5648
ZHAO, C. L. ET AL.: "Study on Y202S: Eu, Mg, Ti, Tb, Red long persistence phosphor", JOURNAL OF THE CHINESE RARE EARTH SOCIETY, vol. 20, no. 6, 2002, pages 593 - 596, XP008173857, ISSN: 1000-4343
ZHAO, C. L. ET AL.: "Study on Y202S: Eu, Mg, Ti, Tb, Red long persistence phosphor", JOURNAL OF THE CHINESE RARE EARTH SOCIETY, vol. 20, no. 6, 2002, pages 593 - 596, XP008173857, ISSN: 1000-4343
Download PDF: