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Structural and electrical characteristics of gallium modified PZT ceramics
- Source :
- Processing and Application of Ceramics, Vol 11, Iss 3, Pp 171-176 (2017)
- Publication Year :
- 2017
- Publisher :
- University of Novi Sad, 2017.
-
Abstract
- In the present paper, the gallium modified lead zirconate titanate ceramics with Zr/Ti = 48/52 (near the morphotropic phase boundary,MPB), having a chemical formula Pb0.98Ga0.02(Zr0.48Ti0.52)0.995O3, was synthesized by a mixed-oxide reaction method and sintered. Analysis of phase formation confirmed the co-existence of two phases (tetragonal and monoclinic symmetry) in the system. Microstructural study by scanning electron microscope showed a non-uniform distribution of large grains over the sample surface and presence of a small amount of micro-size pores. Modulus and impedance studies were carried out at various frequencies (1 kHz-1MHz) and temperatures (300-350?C) and showed the contributions of grains in capacitive and resistive properties of the material. The resistance and capacitance of the complex impedance plots are contributed by grains as observed from the Nyquist plots. The experimental data obtained from the Nyquist plot were implemented in an equivalent electrical circuit (RQC). The value of grain resistance and capacitance were obtained using fitting steps with precision at all temperatures. It is assumed that increase of dielectric constant at higher temperatures is due to the substitution of Ga+ ions at the Pb-site.
- Subjects :
- 010302 applied physics
Materials science
chemistry.chemical_element
02 engineering and technology
Pb(ZrTi)O3
021001 nanoscience & nanotechnology
01 natural sciences
electrical and dielectric properties
structural characterization
lcsh:TP785-869
Ti)O3
chemistry
lcsh:Clay industries. Ceramics. Glass
visual_art
solid-state synthesis
0103 physical sciences
Ceramics and Composites
visual_art.visual_art_medium
Ceramic
Gallium
Composite material
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 24061034 and 18206131
- Volume :
- 11
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Processing and Application of Ceramics
- Accession number :
- edsair.doi.dedup.....f8590ccfab1c7a4a03ca24ca055c90cd