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| Presentation | 2021-10-27 16:00 Characteristics of K0.45Na0.55NbO3 ceramics fabricated from a mixed powder of K0.4Na0.6NbO3 and K0.5Na0.5NbO3 Tomoki Saikyo, Ryo Kobayashi, Noriko Bamba (Shinshu Univ.)  CPM2021-33 Link to ES Tech. Rep. Archives: CPM2021-33 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In order to improve the piezoelectric constant, d33, of K0.45Na0.55NbO3 ceramics, which is a typical base material composition of potassium sodium niobate solid solution, the grain size dependence of d33 was investigated in this study. Two kinds of powders were used for two-step sintering to produce ceramics of varying average grain size: a mixed powder of K0.4Na0.6NbO3 and K0.5Na0.5NbO3 and a single-phase K0.45Na0.55NbO3 powder. As a result, ceramics with average grain size of about 2m to 5.5m were obtained. It was confirmed that the single-phase powder and the mixed powder had different sinterability, and that the mixed powder promoted diffusion more than the single-phase powder. When the single-phase powder and the mixed powder were sintered under the same conditions, there was no significant difference in the Curie temperature, TC. However, the TC decreased in both powders with increasing heating time at high temperatures. The grain size dependence of d33 was obtained, and the optimum average grain size of K0.45Na0.55NbO3 ceramic was estimated within about 2 to 3 m. The maximum d33 value in this study was 126 pC/N for ceramics with an average grain size of approximately 2.4 m fabricated from the mixed powder. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Potassium sodium niobate ceramics / K0.45Na0.55NbO3 / Mixed powder / Piezoelectric constant d33 / Grain size / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 220, CPM2021-33, pp. 51-56, Oct. 2021. | |
| Paper # | CPM2021-33 | |
| Date of Issue | 2021-10-20 (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 | CPM2021-33 Link to ES Tech. Rep. Archives: CPM2021-33 |
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| Conference Information | |
| Committee | CPM |
| Conference Date | 2021-10-27 - 2021-10-27 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Functional materials (semiconductors, magnetic materials, dielectrics, transparent conductors / semiconductors, etc.) thin film processes / materials / devices, etc. |
| Paper Information | |
| Registration To | CPM |
| Conference Code | 2021-10-CPM |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Characteristics of K0.45Na0.55NbO3 ceramics fabricated from a mixed powder of K0.4Na0.6NbO3 and K0.5Na0.5NbO3 |
| Sub Title (in English) | |
| Keyword(1) | Potassium sodium niobate ceramics |
| Keyword(2) | K0.45Na0.55NbO3 |
| Keyword(3) | Mixed powder |
| Keyword(4) | Piezoelectric constant d33 |
| Keyword(5) | Grain size |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Tomoki Saikyo |
| 1st Author's Affiliation | Shinshu University (Shinshu Univ.) |
| 2nd Author's Name | Ryo Kobayashi |
| 2nd Author's Affiliation | Shinshu University (Shinshu Univ.) |
| 3rd Author's Name | Noriko Bamba |
| 3rd Author's Affiliation | Shinshu University (Shinshu Univ.) |
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| Speaker | Author-3 |
| Date Time | 2021-10-27 16:00:00 |
| Presentation Time | 20 minutes |
| Registration for | CPM |
| Paper # | CPM2021-33 |
| Volume (vol) | vol.121 |
| Number (no) | no.220 |
| Page | pp.51-56 |
| #Pages | 6 |
| Date of Issue | 2021-10-20 (CPM) |
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