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| Titel: |
Piezoceramics from the Solid Solution SBNBTN Microstructure and Electromechanical Properties |
| Auteur: |
Moure, A. Ricote, J. Alemany, C. Pardo, L. |
| Verschenen in: |
Ferroelectrics |
| Paginering: | Jaargang 293 (2003) nr. 1 pagina's 231-236 |
| Jaar: |
2003 |
| Inhoud: |
Aurivillius-type compounds are good candidates for their use as high temperature piezoelectrics, due to their high ferro-paraelectric phase transition temperature. This is the case of Bi3TiNbO9 (BTN), with Tc 900C. However there are difficulties to pole ceramics with this composition, due to its high coercive field. To reduce it, solid solutions with SrBi2Nb2O9 (SBN, Tc 420C) are used. It results in ceramics with higher piezoelectric activity. The study of the structure, texture and composition of the solid solution is determinant to understand and to improve the piezoelectric properties. In this work, ceramics of (SBN)1 x(BTN)x composition, with x 0.65 (Tc 780C) have been obtained from mechanochemically activated precursors. The ceramics were obtained by natural sintering, hot-pressing or a combination of both. XRD and EDS were used to characterise the degree of solubility obtained with the different processing routes. Mechanical properties were studied by the Vickers indentation method, and an iterative automatic procedure was used to characterise the piezoelectric and elastic properties from impedance measurements at resonance of thin disks. The relationship between microstructure and electromechanical properties is discussed. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 38 van 46 gevonden artikelen
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