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Paper Abstract and Keywords
Presentation 2024-10-31 13:00
Effect of mixed powder on piezoelectric properties of Bi0.5(Na0.8K0.2)0.5TiO3 ceramics
Kento Kawaguchi, Noriko Bamba (Shinshu Univ.) MRIS2024-8 CPM2024-37
Abstract (in Japanese) (See Japanese page) 
(in English) Sodium potassium bismuth titanate (Bi0.5(NaxK1-x)0.5TiO3: BNKT100x) is one of well-known lead-free piezoelectric materials expected to replace lead zirconate titanate (PZT). In this study, to improve the properties of Bi0.5(Na0.8K0.2)0.5TiO3 (x=0.80: BNKT80) ceramics, BNKT80 ceramics were prepared using mixtures of Bi0.5(Na0.8+0.01yK0.2-0.01y)0.5TiO3 (BNKT80+y) and Bi0.5(Na0.8-0.01yK0.2+0.01y)0.5TiO3 (BNKT80-y) (y=4, 5, 10, 15) powders, and the effects of the composition of mixtures on sintering and electrical properties were investigated. The ratio of tetragonal (T) and rhombohedral (R) phases was also determined by Rietveld analysis. As a result, it was confirmed that BNKT80±5 ceramic with high piezoelectric constant of d33=164 pC/N has larger average grain size than other ceramics, and the ratio of tetragonal (T) and rhombohedral (R) is close to 1:1. Although the overall composition was the same, the microstructure and crystal structure differed depending on the powder combination. It was shown that the optimal combination of powders leads to improved piezoelectric properties.
Keyword (in Japanese) (See Japanese page) 
(in English) Sodium Potassium Bismuth Titanate Ceramics / Lead-free Piezoelectric Materials / Mixed Powder / Microstructure / Crystal structure / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 228, CPM2024-37, pp. 1-4, Oct. 2024.
Paper # CPM2024-37 
Date of Issue 2024-10-24 (MRIS, CPM) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
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)
Download PDF MRIS2024-8 CPM2024-37

Conference Information
Committee MRIS CPM ITE-MMS  
Conference Date 2024-10-31 - 2024-11-01 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagano Camp. Shinshu Univ. + Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Spintronics, Solid State Memory, Functional material, Thin film process, Material, Devices, etc. 
Paper Information
Registration To CPM 
Conference Code 2024-10-MRIS-CPM-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effect of mixed powder on piezoelectric properties of Bi0.5(Na0.8K0.2)0.5TiO3 ceramics 
Sub Title (in English)  
Keyword(1) Sodium Potassium Bismuth Titanate Ceramics  
Keyword(2) Lead-free Piezoelectric Materials  
Keyword(3) Mixed Powder  
Keyword(4) Microstructure  
Keyword(5) Crystal structure  
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Keyword(8)  
1st Author's Name Kento Kawaguchi  
1st Author's Affiliation Shinshu University (Shinshu Univ.)
2nd Author's Name Noriko Bamba  
2nd Author's Affiliation Shinshu University (Shinshu Univ.)
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Speaker Author-1 
Date Time 2024-10-31 13:00:00 
Presentation Time 20 minutes 
Registration for CPM 
Paper # MRIS2024-8, CPM2024-37 
Volume (vol) vol.124 
Number (no) no.227(MRIS), no.228(CPM) 
Page pp.1-4 
#Pages 4 
Date of Issue 2024-10-24 (MRIS, CPM) 

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