Dielectric and Piezoelectric Properties of Barium-substituted Sr1.9Ca0.1NaNb5O15Ceramics
| Autor: | Yoshio Akimune, Rong-Jun Xie, Ruiping Wang, Naoto Hirosaki, Toshiyuki Nishimura |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Phase transition
Phase boundary Materials science Physics and Astronomy (miscellaneous) General Engineering General Physics and Astronomy Mineralogy chemistry.chemical_element Spark plasma sintering Barium Dielectric Tungsten Piezoelectricity chemistry visual_art visual_art.visual_art_medium Ceramic Composite material |
| Zdroj: | Japanese Journal of Applied Physics. 42:7404-7409 |
| ISSN: | 1347-4065 0021-4922 |
| DOI: | 10.1143/jjap.42.7404 |
| Popis: | Highly dense piezoelectric ceramics of tungsten bronze-type (Sr1.9Ca0.1)1-0.5xBaxNaNb5O15 (where x=0.1–0.8) were prepared by spark plasma sintering. The crystallographic parameters, dielectric behaviors and piezoelectric properties of the sintered ceramics were investigated, and the effects of the Ba substitution on these electrical properties were discussed. The structural analysis and the electrical property measurements indicate a morphotropic phase boundary (MPB)-like phenomenon at x=0.4–0.5. In all compositions, a diffuse phase transition and a relaxor behavior are observed. The electrical properties are found to be crystallographically dependent. |
| Databáze: | OpenAIRE |
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