Synthesis and electrical properties of CaO doped BZT lead free piezo ceramics

Chandraiah, M and Sahoo, B and Panda, PK (2016) Synthesis and electrical properties of CaO doped BZT lead free piezo ceramics. Ferroelectrics, 494 (1). pp. 192-199.

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Effect of CaO on ferroelectric, dielectric, piezoelectric properties of Barium Zirconate Titanate (BZT) lead free piezo ceramics was studied. The powders were prepared by mixed-oxide route, calcined at 1000°C for 4 h. XRD patterns of the calcined powders show phase pure perovskite structure. The calcined powders were de-agglomerated, granulated, pressed into pellets and sintered at 1150°C for 3 h. Scanning Electron Microscopy (SEM) studies of thermally etched sintered pellets show sub-micron sized grains for undoped BZT which increases up to 5–8 μm sized for 0.015 mol CaO doped BZT. Energy Dispersive X-ray analysis (EDS) of CaO doped BZT sample confirms the presence of dopants very close to their stoichiometric compositions. The piezoelectric charge constant (d33 = 248 pC/N), dielectric constant (K = 2521) and remnant polarization (Pr = 4.22 μC/cm2) were maximum for BZT samples containing 0.015 mole of CaO.

Item Type: Article
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Mrs SK Pratibha
Date Deposited: 25 Jul 2019 11:30
Last Modified: 25 Jul 2019 11:30

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