• Blagojevic, Vladimir
• Pavlović, Vladimir B.
• Peles Tadic, Adriana
• Kosanović, Darko
• Živojinović, Jelena
• Obradovic, Nina

Abstract

<jats:p>BZT ceramics was prepared by using fine powder mixture of BaCO3, TiO2 andZrO2 in the respective molar ratio to form Ba(Zr0.10Ti0.90)O3 via solidstate reaction at elevated temperature. The prepared BZT was milled in theplanetary ball mill from 0-120 min to achieve different powder grades frommicron to nano-sized particles. After the powder characterization by XRD andSEM the samples were pressed in disc shape and sintered at differenttemperatures from 1100-1350?C in the air. The sintered samples werecharacterized by SEM and their density and average grain size was determinedand presented vs. sintering temperature and powder grades (milling time).After that the silver epoxy electrodes were deposited on sintered discsamples. The disc samples capacity and resistivity were measured at lowfrequency region from 1 Hz to 200 kHz using low frequency impedanceanalyzer. The sintering temperatures and powder grades were used asparameters. Finally the specific resistance ?, dielectric constant (?' +j?") and tg? where determined from the impedance measurements. The behaviorof electronic properties where analyzed e.g. the relaxation effect of thespace charge (inter-granular electric charges) vs. sintering temperature andceramic grades. The results obtained were compared with best literature datafor the losses in BZT ceramics at low frequencies.</jats:p>

Topics

• density
• grain
• silver
• resistivity
• grain size
• scanning electron microscopy
• x-ray diffraction
• grinding
• dielectric constant
• milling
• thermogravimetry
• ceramic
• sintering