Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.
Strontium bismuth titanate samples (SBT) doped with 4-mol % of MnO2 (SBT + Mn) or Nd2O3 (SBT + Nd) were produced by conventional oxide mixture method. The structural, dielectric and piezoelectric properties were compared between the pure and doped ceramics. The aspect ratio of the grains (Width/Thi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Portuguese |
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Universidade de Fortaleza
2009-05-01
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| Series: | Revista Tecnologia |
| Subjects: | |
| Online Access: | https://periodicos.unifor.br/tec/article/view/51 |
| Summary: | Strontium bismuth titanate samples (SBT) doped with 4-mol % of MnO2 (SBT + Mn) or Nd2O3 (SBT + Nd) were produced by conventional oxide mixture method.
The structural, dielectric and piezoelectric properties were compared between the pure and doped ceramics. The aspect ratio of the grains (Width/Thickness – W/T) was modified with the addition of the dopants, being more evident in the SBT +
Mn ceramic than in the others. The neodymium addition increased the electromechanical coupling factor of the ceramics while the manganese doping favored the reduction of this parameter. The values of coercive field, saturation
and remanent polarization for the SBT + Mn ceramic were higher than that obtained to SBT and SBT + Nd ceramics. |
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| ISSN: | 0101-8191 2318-0730 |