Journal article
Structural and dielectric characterization of Sr substituted Ba(Zr,Ti)O3 based functional materials
Single phase Sr substituted BaZr0.1Ti0.9O3 (also known as BZT) ceramics with a formula Ba1-xSrxZr0.1Ti0.9O3 (x=0.10, 0.20, 0.30, 0.40 and 0.50) are prepared using a solid state reaction of mixed oxides at 1250 °C for 15 h. Analysis of XRD patterns of the ceramic powders show that Sr substitutes into Ba sites and reduces the lattice parameter.
The powders are sintered at 1600 °C for 6 h to investigate the microstructure and functional properties. It is found that strontium substitution significantly modifies the microstructure and greatly influences the dielectric properties. The increase in Sr content reduces the ceramic grain size and results in spherical grains.
With an increase in Sr content, the Curie temperature is lowered, and the relative permittivity maximum is increased and broadened. In Ba1-xSrxZr0.1Ti0.9O3 with x=0.30, the relative permittivity reached a maximum of 26600 and with further increase of Sr content, the relative permittivity is lowered and the phase transition is found to be broad and diffused.
The ferroelectric hysteresis characteristics are discussed in detail.
| Language: | English |
|---|---|
| Publisher: | Springer-Verlag |
| Year: | 2007 |
| Pages: | 1011-1015 |
| Journal subtitle: | Materials Science and Processing |
| ISSN: | 14320630 and 09478396 |
| Types: | Journal article |
| DOI: | 10.1007/s00339-007-4208-1 |
Barium Titanate Characterization and Evaluation of Materials Condensed Matter Curie Temperature Dielectric Constant Grain Size Distribution Nanotechnology Operating Procedures, Materials Treatment Optical and Electronic Materials Physics Remanent Polarization Surfaces and Interfaces, Thin Films
