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
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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