Next Article in Journal
Critical Assessment of Techniques for the Description of the Phase Composition of Advanced High-Strength Steels
Previous Article in Journal
Biocarbon Meets Carbon—Humic Acid/Graphite Electrodes Formed by Mechanochemistry
Open AccessArticle

Dielectric and Impedance Studies of (Ba,Ca)TiO3 Ceramics Obtained from Mechanically Synthesized Powders

1
Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia, 75 Pułku Piechoty St. 1A, 41-500 Chorzów, Poland
2
Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawła II 24, 61-138 Poznań, Poland
*
Author to whom correspondence should be addressed.
Materials 2019, 12(24), 4036; https://doi.org/10.3390/ma12244036 (registering DOI)
Received: 16 November 2019 / Revised: 29 November 2019 / Accepted: 2 December 2019 / Published: 4 December 2019
(This article belongs to the Special Issue The Electrophysical Properties of Ceramic Materials)
Mechanochemical synthesis offers unique possibility of perovskite phase formation at ambient conditions that is very attractive (simplifies production, allows strict stoichiometry control and brings economic benefits). In this work the mechanochemical synthesis has been used for preparation ofBa1−xCaxTiO3 (0.2 ≤ x ≤ 0.3) powders from simple oxides. The 20 h milled powders have been uniaxially pressed and sintered in order to get the ceramic samples. The sample morphologies have been observed by scanning electron microscopy. Dielectric and impedance studies have been performed on ceramics. The obtained results indicate that the two mechanism of doping occurred. The first one is observed for the lower calcium concentration (below 0.3) and consists of the introduction of calcium ion into the A site of the perovskite structure. The second one is observed for the higher calcium concentration (equal 0.3). In this case the calcium ions partially occupies the B site in the perovskite structure. Both cases have different influence on the final properties of the ceramics because they induce different defects. View Full-Text
Keywords: mechanochemical synthesis; lead-free piezoelectric material; BCT ceramics mechanochemical synthesis; lead-free piezoelectric material; BCT ceramics
Show Figures

Figure 1

MDPI and ACS Style

Feliksik, K.; Kozielski, L.; Szafraniak-Wiza, I.; Goryczka, T.; Adamczyk-Habrajska, M. Dielectric and Impedance Studies of (Ba,Ca)TiO3 Ceramics Obtained from Mechanically Synthesized Powders. Materials 2019, 12, 4036.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop