Back to Search
Start Over
Structural and electrical properties of Na0.47K0.47Li0.06NbO3 lead-free piezoelectric ceramics modified by AgSbO3
- Source :
- Ceramics International. 39:S135-S138
- Publication Year :
- 2013
- Publisher :
- Elsevier BV, 2013.
-
Abstract
- (1−x)Na0.47K0.47Li0.06NbO3 (NKLN)–xAgSbO3 lead-free piezoelectric ceramics were prepared using a reaction sintering method. The effects of AgSbO3 doping on the structural and electrical properties of NKLN ceramics sintered at 1000–1040 °C were studied. The dopant affected densification, phase content, sintering temperature, microstructure and electrical properties. Variations in the relative intensity of X-ray diffraction peaks were consistent with Ag+ and Sb5+ ions substituting on the perovskite lattice to produce a change in the proportions of co-existing tetragonal and orthorhombic phases. Grain growth during secondary re-crystallization was also affected. The temperature of the orthorhombic–tetragonal (O–T) phase transition and the Curie temperature (TC) decreased as a result of AgSbO3 modifications. The dielectric and piezoelectric properties are enhanced for the composition near the orthorhombic–tetragonal polymorphotropic phase boundary. The 0.92Na0.47K0.47Li0.06NbO3–0.08AgSbO3 ceramics exhibited optimum electrical properties (d33=252 pC/N, er=1450, tan δ=0.02, and TC=280 °C). These results reveal that (1−x)Na0.47K0.47Li0.06NbO3–xAgSbO3 ceramics are promising materials for lead-free piezoelectric application.
- Subjects :
- Phase boundary
Materials science
Dopant
Process Chemistry and Technology
Sintering
Mineralogy
Dielectric
Microstructure
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Grain growth
visual_art
Materials Chemistry
Ceramics and Composites
visual_art.visual_art_medium
Curie temperature
Ceramic
Composite material
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........a3628055e66d5cea860cd8f510657f73