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Paper Abstract and Keywords
Presentation 2011-01-28 13:30
Study on state of Ce in processes of liquid phase synthesis and burning for preparation of Y3Al5O12:Ce phosphor
Takuro Murakawa (Tottori Univ.), Hiroshi Okura (Tottori Univ./Merck Ltd), Tetsuo Honma (JASRI), Yoshinobu Miyamoto, Koutoku Ohmi (Tottori Univ./TEDREC) EID2010-26 Link to ES Tech. Rep. Archives: EID2010-26
Abstract (in Japanese) (See Japanese page) 
(in English) In a phosphor synthesis of Y3Al5O12:Ce (YAG:Ce) by a liquid phase reaction method, the state of Ce in precursors,intermediate products and completed phosphors are systematically investigated by X-ray Absorption Fine Structure (XAFS) measurement.
It has been found out that Ce is initially trivalent in the precursor. However, most of Ce are oxidized and might be segregated as an amorphous tetravalent cerium oxide from the yttrium compounds by firing in air atmosphere.
By contrast, Eu stably remains at Y sites as trivalent even fired in air atmosphere.
It concludes that the redox activity of luminescent centers dominates the incorporation of them into host lattices.
Keyword (in Japanese) (See Japanese page) 
(in English) liquid phase reaction / XAFS / YAG:Ce / white LED phosphor / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 404, EID2010-26, pp. 17-20, Jan. 2011.
Paper # EID2010-26 
Date of Issue 2011-01-21 (EID) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EID2010-26 Link to ES Tech. Rep. Archives: EID2010-26

Conference Information
Conference Date 2011-01-28 - 2011-01-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Kochi University of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Display technology, etc 
Paper Information
Registration To EID 
Conference Code 2011-01-EID-IDY-EDD-OMD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on state of Ce in processes of liquid phase synthesis and burning for preparation of Y3Al5O12:Ce phosphor 
Sub Title (in English)  
Keyword(1) liquid phase reaction  
Keyword(2) XAFS  
Keyword(3) YAG:Ce  
Keyword(4) white LED phosphor  
1st Author's Name Takuro Murakawa  
1st Author's Affiliation Tottori University (Tottori Univ.)
2nd Author's Name Hiroshi Okura  
2nd Author's Affiliation Tottori University/Merck Ltd (Tottori Univ./Merck Ltd)
3rd Author's Name Tetsuo Honma  
3rd Author's Affiliation JASRI (JASRI)
4th Author's Name Yoshinobu Miyamoto  
4th Author's Affiliation Tottori University/TEDREC (Tottori Univ./TEDREC)
5th Author's Name Koutoku Ohmi  
5th Author's Affiliation Tottori University/TEDREC (Tottori Univ./TEDREC)
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Date Time 2011-01-28 13:30:00 
Presentation Time
Registration for EID 
Paper # IEICE-EID2010-26 
Volume (vol) IEICE-110 
Number (no) no.404 
Page pp.17-20 
#Pages IEICE-4 
Date of Issue IEICE-EID-2011-01-21 

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