Jan Petrášek
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Jan Petrášek has a total of 3 co-authors. Here are the top co-authors by number of shared publications:
- František Lukáč
Institute of Plasma Physics of the Czech Academy of Sciences, U Slovanky 1a, 18200 Praha, Czech Republic
1 shared publication - Josef Sedláček
Faculty of Electrical Engineering, Czech Technical University, Technická 2, 166 27 Prague, Czech Republic
1 shared publication - Pavel Ctibor
Institute of Plasma Physics, The Czech Academy of Sciences, U Slovanky, Prague, Czech Republic
1 shared publication
Latest Publications
- Open Access
Synthesis and Pressure-Assisted Sintering of CaCu3Ti4O12 Dielectrics
In this paper, we examined the dielectric properties of CaCu3Ti4O12 (CCTO) ceramics fabricated by various routes and discussed the most important conditions affecting their dielectric behavior. We prepared feedstock powder using a molten salt route and compared it with a commercial powder. Both powders were sintered using SPS. For some samples, annealing was applied after sintering. Other samples were obtained by high-pressure forming and conventional sintering, using both powders. Phase composition, porosity and microhardness were evaluated in comparison with the literature. The results showed that a sintering temperature just below or equal to 1000 °C should be set for the SPS process. However, the best dielectric characteristics were obtained in samples prepared by high-pressure forming and conventional sintering, which showed a relative permittivity of 22,000 and a loss tangent of 0.13 at 1 MHz.
Open AccessSynthesis and Pressure-Assisted Sintering of CaCu3Ti4O12 Dielectrics
In this paper, we examined the dielectric properties of CaCu3Ti4O12 (CCTO) ceramics fabricated by various routes and discussed the most important conditions affecting their dielectric behavior. We prepared feedstock powder using a molten salt route and compared it with a commercial powder. Both powders were sintered using SPS. For some samples, annealing was applied after sintering. Other samples were obtained by high-pressure forming and conventional sintering, using both powders. Phase composition, porosity and microhardness were evaluated in comparison with the literature. The results showed that a sintering temperature just below or equal to 1000 °C should be set for the SPS process. However, the best dielectric characteristics were obtained in samples prepared by high-pressure forming and conventional sintering, which showed a relative permittivity of 22,000 and a loss tangent of 0.13 at 1 MHz.