| Presentation | 2022-10-28 Microstructure and piezoelectricity of multi-elements doped K0.45Na0.55NbO3 ceramics Kandai Nagata, Noriko Bamba, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Potassium sodium niobate (KNN) is one of the most widely studied lead-free piezoelectric materials. In this study, multi-elements doped 0.95(K0.45Na0.55)0.98Li0.02NbO3-0.02BaZrO3-0.03Bi0.5K0.5HfO3 ceramics were fabricated by a two-step sintering method, and the effects of holding times at 1st step and 2nd step (t1 and t2) on the microstructures, The Curie temperature TC and piezoelectric constants d33 were investigated. Densification and grain growth progressed when the holding time t1 at 1150oC was longer than 10 min. The highest density of about 95% was obtained at t1=50 min and t2=15 h. The TC decreased with increasing holding times t1 and t2, presumably due to volatilization of alkali metal elements. The d33 varied from 86 pC/N to 232 pC/N, depending on the compositional change due to the volatilization and the grain size. The grain size dependence of d33 suggested an optimum grain size of 3.0 ~ 3.5 ?m for this KNN solid solution. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Potassium sodium niobate / multi-elements doping / two-step sintering / piezoelectric constant / grain size |
| Paper # | MRIS2022-16,CPM2022-47 |
| Date of Issue | 2022-10-20 (MRIS, CPM) |
| Conference Information | |
| Committee | MRIS / CPM / ITE-MMS |
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| Conference Date | 2022/10/27(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Shinshu Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Spintronics, Solid State Memory, Functional material, Thin film process, Material, Devices, etc. |
| Chair | Ikuya Tagawa(Tohoku Inst. of Tech.) / Yuichi Nakamura(Toyohashi Univ. of Tech.) |
| Vice Chair | / Hideki Nakazawa(Hirosaki Univ.) |
| Secretary | (Ehime Univ.) / Hideki Nakazawa(Samsung) / (Ehime Univ.) |
| Assistant | Nobuaki Kikuchi(Tohoku Univ.) / Toshiki Yamaji(AIST) / Yasuo Kimura(Tokyo Univ. of Tech.) / Fumihiko Hirose(Yamagata Univ.) / Noriko Bamba(Shinshu Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Magnetic Recording & Information Storage / Technical Committee on Component Parts and Materials / Technical Group on Multi-media Storage |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Microstructure and piezoelectricity of multi-elements doped K0.45Na0.55NbO3 ceramics |
| Sub Title (in English) | |
| Keyword(1) | Potassium sodium niobate |
| Keyword(2) | multi-elements doping |
| Keyword(3) | two-step sintering |
| Keyword(4) | piezoelectric constant |
| Keyword(5) | grain size |
| 1st Author's Name | Kandai Nagata |
| 1st Author's Affiliation | Shinshu University(Shinshu Univ.) |
| 2nd Author's Name | Noriko Bamba |
| 2nd Author's Affiliation | Shinshu University(Shinshu Univ.) |
| Date | 2022-10-28 |
| Paper # | MRIS2022-16,CPM2022-47 |
| Volume (vol) | vol.122 |
| Number (no) | MRIS-230,CPM-231 |
| Page | pp.pp.43-47(MRIS), pp.43-47(CPM), |
| #Pages | 5 |
| Date of Issue | 2022-10-20 (MRIS, CPM) |