Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2026-03-02 14:55
Investigation of Hydrothermal Synthesis conditions for K0.5Na0.5NbO3 Powders
Saaya Rokukawa, Noriko Bamba (Shinshu Univ.) CPM2025-74
Abstract (in Japanese) (See Japanese page) 
(in English) Potassium sodium niobate (KxNa1−xNbO3, KNN) is a promising lead-free piezoelectric material as an alternative to lead zirconate titanate (PZT). In this study, hydrothermal synthesis was employed to fabricate fine KNN powders with a K0.5Na0.5NbO3 composition for the development of high-performance KNN ceramics. The effects of solution concentration, KOH/NaOH ratio, and reaction time on phase formation, crystal structure, particle size, and composition were investigated. High-concentration conditions favored single-phase KNN formation but promoted particle growth. In contrast, a low solution concentration of 4.5 mol/L with a prolonged reaction time of 72 h enhanced KNN phase formation and yielded finer powders, indicating a promising condition for further optimization.
Keyword (in Japanese) (See Japanese page) 
(in English) Potassium sodium niobate ceramics / Lead-free piezoelectric materials / Hydrothermal synthesis / Microstructure / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 374, CPM2025-74, pp. 20-23, March 2026.
Paper # CPM2025-74 
Date of Issue 2026-02-23 (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 CPM2025-74

Conference Information
Committee CPM  
Conference Date 2026-03-02 - 2026-03-02 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To CPM 
Conference Code 2026-03-CPM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation of Hydrothermal Synthesis conditions for K0.5Na0.5NbO3 Powders 
Sub Title (in English)  
Keyword(1) Potassium sodium niobate ceramics  
Keyword(2) Lead-free piezoelectric materials  
Keyword(3) Hydrothermal synthesis  
Keyword(4) Microstructure  
Keyword(5)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Saaya Rokukawa  
1st Author's Affiliation Shinshu University (Shinshu Univ.)
2nd Author's Name Noriko Bamba  
2nd Author's Affiliation Shinshu University (Shinshu Univ.)
3rd Author's Name  
3rd Author's Affiliation ()
4th Author's Name  
4th Author's Affiliation ()
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2026-03-02 14:55:00 
Presentation Time 20 minutes 
Registration for CPM 
Paper # CPM2025-74 
Volume (vol) vol.125 
Number (no) no.374 
Page pp.20-23 
#Pages 4 
Date of Issue 2026-02-23 (CPM) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan