| 학회 |
한국재료학회 |
| 학술대회 |
2018년 봄 (05/16 ~ 05/18, 삼척 쏠비치 호텔&리조트) |
| 권호 |
24권 1호 |
| 발표분야 |
2. 유전체/압전체의 도전과 미래(Challenges and Future for Dielectrics and Piezoelectrics)-오거나이저: 이순일 교수(창원대) |
| 제목 |
Behavior of templates in texturing of piezoelectric ceramics |
| 초록 |
Over the past few decades, lead-based piezoelectric ceramics have been used extensively for sensors, actuators and transducers owing to their excellent piezoelectric properties. But the toxicity from lead and its compounds to human health and the environment gives rise to environmental regulations which restrict the use of lead-based piezoelectric ceramics by replacing them with lead-free piezoelectric ceramics while maintaining comparable piezoelectric properties. Improvement of piezoelectric properties of both the lead-based and lead-free piezoelectric ceramics can be achieved by controlling the grain orientation through texture engineering using anisotropic templates with plate-like shapes. Through the growth of aligned templates, texture engineering can produce samples containing grains aligned along certain crystallographic orientations instead of randomly distributed matrix grains. One of the most important parameters in texture engineering is the role of the template. Plate-like BaTiO3 (BT) particle is the most widely used template for texturing of lead-based piezoelectric ceramics. In contrast, variety of templates, such as Bi4Ti3O12 (BiT), Bi4.5Na0.5Ti4O15 (BNT15), Bi0.5Na0.5TiO3 (BNT), NaNbO3 (NN), and NaNb1-xTaxO3 (NNT) templates can be used as templates for texturing of lead-free piezoelectric ceramics. Plate-like templates are generally synthesized by the molten-salt method followed by the topochemical microcrystal conversion (TMC) process. In this study, we investigated the role and behavior of templates in texture engineering of lead-based and lead-free piezoelectric ceramics. |
| 저자 |
Jae-Ho Jeon1, Hyun Ae Cha2
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| 소속 |
1Functional Powder Research Lab., 2Korea Institute of Materials Science |
| 키워드 |
piezoelectric ceramics; lead-based; lead-free; texturing; template
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| E-Mail |
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