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Paper Abstract and Keywords
Presentation 2014-12-19 14:00
Ionic conductive property of F-doped B-type carbonate apatite
Saki Kobayashi (Tokyo Univ. of Sci.), Yumi Kunugi (Kyushu Inst. of Tech.), Yumi Tanaka (Tokyo Univ. of Sci.) OME2014-69
Abstract (in Japanese) (See Japanese page) 
(in English) B-type carbonated apatite (BCA: [Ca10-xNa2x/3][(PO4)6-x(CO3)x][(H2O)x(OH)2-x/3]) with certain contents of CO32- ions shows relatively high oxide ion conductivity of 10-3 Scm-1 at 800℃ and our recent study revealed that the conductivity is improved by the partial substitution of OH- ions by F- ions. Hence in this study, to evaluate the role of carbonate and fluoride ions in the conductivity, the contents of carbonate and fluoride ion in BCA were tried to be varied and the ionic conductivity of the resulted ceramics was compared in terms of the composition. XRD, FT-IR and F- ion concentration measurements indicated the successful preparation of the two kinds of BCA powders with different carbonate content (x⋍1.9 for BCA(2) and x⋍2.6 for BCA(15)), and their F- doped ceramics with the same fluoride ion content (⋍2 wt%) and the different carbonate content of x⋍0.6 (FCA(2)) and x⋍1.5 (FCA(15)). According to the results of impedance measurements, the conductivity of BCA was proved to be efficiently improved by the F--ion doping whereas the increased carbonate content in BCA had less contributions in conductivity of BCA. Furthermore, the activation energy for the ionic conductivity of FCA(2) was much higher than that of FCA(15), indicating the strong contribution of carbonate content to the activation energy of FCA.
Keyword (in Japanese) (See Japanese page) 
(in English) Carbonated apatite / Doping / Ionic conductivity / Solid electrolyte / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 383, OME2014-69, pp. 23-25, Dec. 2014.
Paper # OME2014-69 
Date of Issue 2014-12-12 (OME) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction		 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. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee OME  
Conference Date 2014-12-19 - 2014-12-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg 
Topics (in Japanese) (See Japanese page) 
Topics (in English) battery, electrochemistry, surface modification, catalyst, in situ obsrvation, capacito 
Paper Information
Registration To OME 
Conference Code 2014-12-OME 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Ionic conductive property of F-doped B-type carbonate apatite 
Sub Title (in English)  
Keyword(1) Carbonated apatite  
Keyword(2) Doping  
Keyword(3) Ionic conductivity  
Keyword(4) Solid electrolyte  
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1st Author's Name Saki Kobayashi  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Sci.)
2nd Author's Name Yumi Kunugi  
2nd Author's Affiliation Kyushu University (Kyushu Inst. of Tech.)
3rd Author's Name Yumi Tanaka  
3rd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Sci.)
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Speaker Author-1 
Date Time 2014-12-19 14:00:00 
Presentation Time 15 minutes 
Registration for OME 
Paper # OME2014-69 
Volume (vol) vol.114 
Number (no) no.383 
Page pp.23-25 
#Pages 3 
Date of Issue 2014-12-12 (OME) 

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