Calcium stannate dielectrics compacted 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_____%2F25%3A00647878" target="_blank" >RIV/61389021:_____/25:00647878 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21230/25:00384463
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0921510725002260" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0921510725002260</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.mseb.2025.118203" target="_blank" >10.1016/j.mseb.2025.118203</a>
Alternative languages
Result language
angličtina
Original language name
Calcium stannate dielectrics compacted by spark plasma sintering
Original language description
The aim of this work was to sinter calcium stannate dielectric ceramics, CaSnO3, via spark plasma sintering (SPS). The material is difficult to sinter, mainly because of Sn volatility. A semi-commercial powder product was consolidated into a form of bulk discs by SPS. As the main variable parameter, the hot-compaction pressure varied from 30 MPa to 80 MPa. The as-sintered bulks were studied by microscopy, phase analysis, X-ray photoelectron spectroscopy and microhardness. The samples were covered with electrodes and dielectric parameters were measured, including DC resistance. Relative permittivity and loss tangent values for the frequency range 1 kHz to 1 MHz and the temperature range 30 °C to 200 °C were very stable with no relaxation. Connections between the sintering parameters, microstructure and dielectric characteristics were found. Samples sintered at the pressure over 30 MPa behaved like reliable dielectrics. A novel approach to sintering of very promising dielectrics was developed: The sample sintered at 1300 °C using 50 MPa pressure exhibited very interesting values, εr = 28.2, tan(δ) = 0.036 and thermal coefficient of capacitance TCC = 26 ppm/K at 1 MHz. The influence of vacancies and ion valence modifications was discussed.
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
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materials Science and Engineering B-Advanced Functional Solid-State Materials
ISSN
0921-5107
e-ISSN
1873-4944
Volume of the periodical
317
Issue of the periodical within the volume
July
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
118203
UT code for WoS article
001443949000001
EID of the result in the Scopus database
2-s2.0-86000143306