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Dielectric Spectroscopy of Calcium Titanate Processed by Spark Plasma Sintering

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00583097" target="_blank" >RIV/61389021:_____/23:00583097 - isvavai.cz</a>

  • Alternative codes found

    RIV/68407700:21230/23:00369242

  • Result on the web

    <a href="https://www.mdpi.com/1996-1944/16/3/975" target="_blank" >https://www.mdpi.com/1996-1944/16/3/975</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3390/ma16030975" target="_blank" >10.3390/ma16030975</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Dielectric Spectroscopy of Calcium Titanate Processed by Spark Plasma Sintering

  • Original language description

    Calcium titanate (CaTiO3) powder was compacted by spark plasma sintering (SPS). The resulting products were subjected to the phase stability study and dielectric characterization. The change in temperature of SPS between 1100 °C and 1250 °C had a clear and straightforward effect on density, porosity, relative permittivity, loss tangent, and DC resistivity. Since the SPS itself introduces certain oxygen deficiency into Ti-perovskites, all samples were annealed after SPS. However, this post-processing did not mask the effects of the SPS regime. Optical reflectance measurements were completed to compare and quantify the sample coloration and support the dielectric results with corresponding optical band gap estimations. Subtle changes in the CaTiO3 crystal lattice arrangement, completed between 1150 °C and 1250 °C and documented in the literature for conventionally sintered samples, could not be confirmed for SPS-prepared calcium titanate. The novelty of this research work is in producing very stable dielectric ceramics and an indication of the SPS processing parameters suitable for this. The best sample showed at 1 MHz frequency the combination of relative permittivity 370, loss tangent 0.008, and DC resistivity 3 × 1012 Ωm.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20501 - Materials engineering

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2023

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Materials

  • ISSN

    1996-1944

  • e-ISSN

    1996-1944

  • Volume of the periodical

    16

  • Issue of the periodical within the volume

    3

  • Country of publishing house

    CH - SWITZERLAND

  • Number of pages

    14

  • Pages from-to

    975

  • UT code for WoS article

    000929699100001

  • EID of the result in the Scopus database

    2-s2.0-85147795981