Journal ID : TRKU-23-11-2020-11332
[This article belongs to Volume - 62, Issue - 11]
Total View : 423

Title : Synthesis and characterization of Ba0.85Ca0.15 Zr0.1Ti0.9O3 Lead-Free Piezoelectric Ceramic Materials

Abstract :

The Ba0.85Ca0.15 Zr0.1Ti0.9O3 (BCZT) piezoelectric material was prepared using solid-state reaction method. The oxides and carbonates were mixed and mechanically activated using the high-energy ball mill for 8, 10 and 12 h prior to the solid-state reaction. Thermal analyses have been used to follow the reactions in the milled powder. The milled powders were calcined in the temperature range from 850- 950 °C for 5 hours. The compacts made from the calcined powders were sintered at 1400, 1450 and 1500 oC for 2 h. XRD and SEM techniques were used for the characterization of the prepared powder, as well as the sintered compacts. The dielectric properties of the sintered samples were measured using RCL meter. The results showed that, irrespective of the milling time, complete formation of BCZT phase took place at 950 °C.  A relative permittivity of 24000 at Curie temperature and 7060 at room temperature, with low values of dielectric losses (0.00171) were obtained for the sample made from the powder milled for 8 h and sintered at 1500 °C for 2h. The relative permittivity versus temperature showed a relaxor type behavior and diffuse transition.

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