| 研究課題/領域番号 |
19F19065
|
|---|
| 研究種目 |
特別研究員奨励費
|
| 配分区分 | 補助金 |
|---|
| 応募区分 | 外国 |
|---|
| 審査区分 |
小区分26020:無機材料および物性関連
|
|---|
| 研究機関 | 山梨大学 |
|---|
研究代表者 |
和田 智志 山梨大学, 大学院総合研究部, 教授 (60240545)
|
|---|
| 研究分担者 |
KIM SANGWOOK 山梨大学, 大学院総合研究部, 外国人特別研究員
|
|---|
| 研究期間 (年度) |
2019-04-25 – 2020-03-31
|
| 研究課題ステータス |
中途終了 (2019年度)
|
| 配分額 *注記 |
2,300千円 (直接経費: 2,300千円)
2019年度: 1,200千円 (直接経費: 1,200千円)
|
|---|
| キーワード | MPB behaviors / structural engineering |
|---|
| 研究開始時の研究の概要 |
I founded that Bi ion off-centering was only associated in the material softening in the BF-BT ceramics. On base on this idea, if Ba ions are doped in the MPB composition of PZT ceramics, the piezoelectric constant enhanced with low dielectric constant by Pb ion off-centering can be obtained in the Ba doped PZT (PZT-Ba) ceramics by structural engineering (MPB + Pb ion off-centering). The material softening behaviors will be investigated by electrical properties. The Pb ion off-centering at 950 K and 300 K will be identified using structure refinement/MEM method.
|
| 研究実績の概要 |
The purpose of research project is to enhance piezoelectric property by the structural engineering on the basis of mechanism of material softening with ion off-centering and morpotropic phase boundary (MPB).
This research project was conducted by Prof. Satoshi Wada and Dr. Sangwook Kim in cooperation with each other in their specialized fields. This year, the research was conducted to enhance of the kp in PZT ceramics through structural engineering, and confirming its crystal structure to achieve the research objectives. The existence of MPB in the Ba and La co-doped PZT ceramics was confirmed by synchrotron radiation X-ray diffraction, which was measured in the SPring-8. Besides, it was confirmed that structure engineering (MPB + ion’s off-centering) is effective in improving the electrical properties by showing a significantly higher kp value of structure engineered ceramics.
|
| 現在までの達成度 (段落) |
令和元年度が最終年度であるため、記入しない。
|
| 今後の研究の推進方策 |
令和元年度が最終年度であるため、記入しない。
|
