Počet záznamů: 1
Dielectric Spectroscopy of Calcium Titanate Processed by Spark Plasma Sintering
- 1.
SYSNO ASEP 0583097 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Dielectric Spectroscopy of Calcium Titanate Processed by Spark Plasma Sintering Tvůrce(i) Ctibor, Pavel (UFP-V) RID, ORCID
Sedláček, J. (CZ)
Straka, L. (CZ)
Lukáč, František (UFP-V) ORCID
Neufuss, Karel (UFP-V) RIDCelkový počet autorů 5 Číslo článku 975 Zdroj.dok. Materials. - : MDPI
Roč. 16, č. 3 (2023)Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova band gap ; calcium titanate ; dielectrics ; permittivity ; spark plasma sintering Vědní obor RIV JP - Průmyslové procesy a zpracování Obor OECD Materials engineering Způsob publikování Open access Institucionální podpora UFP-V - RVO:61389021 UT WOS 000929699100001 EID SCOPUS 85147795981 DOI 10.3390/ma16030975 Anotace 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. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2024 Elektronická adresa https://www.mdpi.com/1996-1944/16/3/975
Počet záznamů: 1