Effect of Pr on microstructure and dielectric properties of SrTiO3
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2018
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BRAZILIAN MRS MEETING, 17th
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Resumo
Polycrystalline ceramics based on strontium titanate (SrTiO3) have attracted great
attention in recent years due to their interesting dielectric properties, e.g. high
electric permittivity and low dielectric loss. SrTiO3 has many applications in
electronic devices, sensors, actuators, fuel cells, among others. Recently, the
effects of dopants on the dielectric properties of SrTiO3 have been investigated.
Lui et al. [1] were the first to report a giant electric permittivity in Sr0.09Pr0.01TiO3
(> 3,000) at room temperature. In this work, the effect of Pr (0.025, 0.05 and
0.075% mol Pr) on the microstructure and dielectric properties of SrTiO3 was
studied in detail.
Samples were characterized by density measurement, X-ray diffraction, scanning
electron microscopy and impedance spectroscopy. The results show that sintered
samples at 1500 ºC/6 h exhibit high densities (> 96% of the theoretical value),
independent on the additive content. The average grain size of SrTiO3 increases
slightly with Pr addition. Specimens containing 0.075% mol Pr show high giant
permittivity (about 30,000) at 540 ºC.
Como referenciar
FUJIMOTO, TALITA G.; MUCCILLO, ELIANA N. dos S. Effect of Pr on microstructure and dielectric properties of SrTiO3. In: BRAZILIAN MRS MEETING, 17th, September 16-20, 2018, Natal, RN. Abstract... São Carlos: Aptor Software, 2018. p. 146-146. Disponível em: http://repositorio.ipen.br/handle/123456789/30331. Acesso em: 26 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.