Enhanced Piezoelectricity around the Tetragonal/Orthorhombic Morphotropic Phase Boundary in (Na, K)NbO_3_-ATiO_3_ Solid Solutions
| Autor: | Hirofumi Kawanaka, Hiroshi Bando, Mitsuru Itoh, Ruiping Wang, Rong-Jun Xie, K. Matsusaki, Kotaro Hanada, Tadashi Sekiya |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Phase boundary
Materials science Condensed matter physics Mineralogy Condensed Matter Physics Piezoelectricity Titanate Electronic Optical and Magnetic Materials Tetragonal crystal system Mechanics of Materials Materials Chemistry Ceramics and Composites Orthorhombic crystal system Electrical and Electronic Engineering Phase diagram Solid solution Perovskite (structure) |
| Zdroj: | Journal of Electroceramics. 21:263-266 |
| Popis: | The high density perovskite titanates-modified potassium–sodium niobate solid solutions (1−x)(Na0.5K0.5)NbO3−xBaTiO3 and (1−x)(Na0.5K0.5)NbO3−xSrTiO3 have been prepared by the solid state reaction method. The phase diagram summarized from the dielectric property measurement reveals that there exists a tetragonal/orthorhombic morphotropic phase boundary for both the solid solutions. The piezoelectric properties show enhanced behavior at around the tetragonal/orthorhombic morphotropic phase boundary. It is believed that the origin for the high piezoelectric performance (Na,K)NbO3-based lead-free piezoelectric ceramics is the same as that for the lead zinc niobate-lead titanate solid solution. |
| Databáze: | OpenAIRE |
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