Science of Sintering 2023 Volume 55, Issue 3, Pages: 413-423
https://doi.org/10.2298/SOS230717043K
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Electronic properties of BZT nano-ceramic grades at low frequency region
Kosanović Darko 
(Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Belgrade, Serbia), darko.kosanovic@itn.sanu.ac.rs
Blagojević Vladimir A. (TBP Sotfware, Beograd)
Aleksić Stanko O. (Institute Iritel, Belgrade)
Živojinović Jelena (Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Belgrade, Serbia)
Peleš-Tadić Adriana (Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Belgrade, Serbia)
Pavlović Vladimir B. (Faculty of Agriculture, University of Belgrade, Belgrade-Zemun, Serbia)
Obradović Nina (Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Belgrade, Serbia)
BZT ceramics was prepared by using fine powder mixture of BaCO3, TiO2 and
ZrO2 in the respective molar ratio to form Ba(Zr0.10Ti0.90)O3 via solid
state reaction at elevated temperature. The prepared BZT was milled in the
planetary ball mill from 0-120 min to achieve different powder grades from
micron to nano-sized particles. After the powder characterization by XRD and
SEM the samples were pressed in disc shape and sintered at different
temperatures from 1100-1350°C in the air. The sintered samples were
characterized by SEM and their density and average grain size was determined
and presented vs. sintering temperature and powder grades (milling time).
After that the silver epoxy electrodes were deposited on sintered disc
samples. The disc samples capacity and resistivity were measured at low
frequency region from 1 Hz to 200 kHz using low frequency impedance
analyzer. The sintering temperatures and powder grades were used as
parameters. Finally the specific resistance ρ, dielectric constant (ε' +
jε") and tgδ where determined from the impedance measurements. The behavior
of electronic properties where analyzed e.g. the relaxation effect of the
space charge (inter-granular electric charges) vs. sintering temperature and
ceramic grades. The results obtained were compared with best literature data
for the losses in BZT ceramics at low frequencies.
Keywords: BZT ceramics, Sintering, Dielectric Properties
Project of the Ministry of Science, Technological Development and Innovation, Republic of Serbia, Grant no. 451-03-47/2023-01/200175
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