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Spark plasma sintering of dielectric BaTaO2N close to the melting point of the BaCN2 additive
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| Title: | Spark plasma sintering of dielectric BaTaO2N close to the melting point of the BaCN2 additive |
| Authors: | Hosono, Akira Browse this author | | Inoguchi, Masashi Browse this author | | Masubuchi, Yuji Browse this author →KAKEN DB | | Murayama, Koji Browse this author | | Iha, Michiaki Browse this author | | Higuchi, Mikio Browse this author →KAKEN DB | | Kikkawa, Shinichi Browse this author |
| Keywords: | Oxynitride | | Perovskite | | Metal carbodiimide | | Spark plasma sintering |
| Issue Date: | Jun-2020 |
| Publisher: | Elsevier |
| Journal Title: | Journal of the European ceramic society |
| Volume: | 40 |
| Issue: | 6 |
| Start Page: | 2317 |
| End Page: | 2322 |
| Publisher DOI: | 10.1016/j.jeurceramsoc.2020.02.008 |
| Abstract: | The perovskite-type oxynitride BaTaO2N is a promising lead-free relaxor ferroelectric material. However, this material releases a part of its nitrogen during its sintering above 1350 degrees C. Subsequent annealing of the resulting sintered BaTaO2N0.85 ceramics under an ammonia flow is necessary to recover an insulating, stoichiometric BaTaO2N ceramics. Very recently, molten BaCN2 was reported to be a useful flux for the preparation of BaTaO2N microcrystals without the loss of nitrogen. In the present work, BaTaO2N powder was sintered with a BaCN2 additive under mechanical pressure, using a spark plasma sintering system. Nitrogen loss from the BaTaO2N ceramic was avoided during liquid phase sintering at approximately 900 degrees C. The stoichiometric BaTaO2N ceramic product with a relative density of 79.8 % was an electrically insulator and it showed its relative dielectric constants, epsilon(r) in the range from 320 to 650 and a loss tans values from 0.04 to 0.19 at room temperature. |
| Rights: | ©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/84431 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 鱒渕 友治
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