Spark-plasma-sintering of fine BaTiO3 powder prepared by a sol-crystal method
Source abstract
Abstract
Spark-Plasma-Sintering (SPS) has been applied to fine BaTiO3 powder (several nanometers) prepared by a sol-crystal method. The starting powder was densified to more than 95% of the theoretical X-ray density, and the obtained SPS pellets had an average grain size of less than 1 μm, owning to the relatively low sintering temperature (900–1000°C) and short sintering period of ca. 3 min. The room temperature permittivity at 1 kHz for SPS samples sintered at 1000°C is ca. 10,000. This high room temperature permittivity value is attributed to electrical inhomogeneities within pellets; a resistive surface layer covers the inner pellet core that consists of oxygen-deficient BaTiO3. The reduced pellet core is characteristic of SPS pellets formed from powders that contain small amounts of residual organic matter.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (26)
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