Tunability and relaxor properties of ferroelectric barium stannate titanate ceramics
- Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Hong Kong (China)
Barium stannate titanate [Ba(Sn{sub x}Ti{sub 1-x})O{sub 3}, x=0.1, 0.2, 0.3, and 0.4] ceramics were prepared using a conventional solid-state reaction process. Their dielectric properties were measured under direct current bias fields ranging from 0 to 2.5 kV/cm. A transformation from normal to relaxor ferroelectrics was observed when x{>=}0.3. Broken long-range order or 'dirty' ferroelectric domains and nanodomains were observed in Ba(Sn{sub 0.1}Ti{sub 0.9})O{sub 3} and Ba(Sn{sub 0.4}Ti{sub 0.6})O{sub 3} by transmission electron microscopy, respectively. Voltage driven tunability was found to decrease with increasing Sn content. The change from normal ferroelectric into relaxor ferroelectric had a negative impact on the tunability value of the materials.
- OSTI ID:
- 20634480
- Journal Information:
- Applied Physics Letters, Vol. 85, Issue 22; Other Information: DOI: 10.1063/1.1829794; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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