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Energy-Storage Properties of 0.89 Bi0.5Na0.5TiO3-0.06 BaTiO3-0.05 K0.5Na0.5NbO3 Lead-Free Anti-ferroelectric Ceramics.
- Source :
- Journal of the American Ceramic Society; Dec2011, Vol. 94 Issue 12, p4382-4386, 5p, 1 Chart, 7 Graphs
- Publication Year :
- 2011
-
Abstract
- Energy-storage properties of 0.89 Bi<subscript>0.5</subscript>Na<subscript>0.5</subscript>TiO<subscript>3</subscript>-0.06 BaTiO<subscript>3</subscript>-0.05 K<subscript>0.5</subscript>Na<subscript>0.5</subscript>NbO<subscript>3</subscript> (0.89 BNT-0.06 BT-0.05 KNN) lead-free ceramics were first investigated. Measurements of dielectric properties together with switching current curves indicate a rather diffuse ferroelectric ( FE) to anti-ferroelectric ( AFE) phase transition when heating from 20°C to 90°C. The energy density ( W), which was calculated from P-E hysteresis loops, increases linearly with the external electric field when E exceeds AFE- FE transition field. W is independent of temperature and frequency, and maintains around 0.59 J/cm<superscript>3</superscript> under 5.6 kV/mm in the stable AFE phase region. These properties indicate that 0.89 BNT-0.06 BT-0.05 KNN ceramics might be a promising lead-free AFE material for energy-storage capacitor application. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 94
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 67651151
- Full Text :
- https://doi.org/10.1111/j.1551-2916.2011.04731.x