Room temperature structural, dielectric, and conductivity properties of AlxCd1-xFe2O4 ferrites
Autor: | Tuğba Şaşmaz Kuru |
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Rok vydání: | 2019 |
Předmět: |
010302 applied physics
Materials science Spinel Analytical chemistry Nanoparticle 02 engineering and technology Dielectric engineering.material Conductivity 021001 nanoscience & nanotechnology Thermal conduction 01 natural sciences 0103 physical sciences engineering Dielectric loss Grain boundary 0210 nano-technology Stoichiometry |
Zdroj: | Journal of the Australian Ceramic Society. 56:453-460 |
ISSN: | 2510-1579 2510-1560 |
Popis: | The purpose of this study is to investigate dielectric and conduction mechanisms in accordance with composition at room temperature. In this study, AlxCd1-xFe2O4 ferrites with different stoichiometric rates (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) were prepared through co-precipitation method. The precipitated powder was sintered at 800 °C for 8 h to form the pure spinel ferrite nanoparticle. The formation of the cubic spinel phase has been demonstrated by X-ray diffraction analysis. The resulting powder was shown to be nanosized. Experiments were performed at room temperature in the frequency range of 20 Hz to 10 MHz. Frequency-dependent dielectric permittivity and dielectric loss for all examined samples exhibit the dielectric relaxation phenomenon explained by the Maxwell-Wagner polarization. Dielectric constant, AC conductivity, and dielectric loss decreased with increasing frequency. Dielectric constant, dielectric loss, and AC conductivity decreased along with increasing stoichiometric ratio x = 0 to 0.5. However, deviations in the intermediate values were observed, and the values of 0.2 were between 0 and 0.1 and the values of 0.3 were between 0.4 and 0.5. The impedance analysis explained the role of grains and grain boundaries within prepared samples. As a result, it was found that the relaxation process was compatible with the Cole-Cole model. |
Databáze: | OpenAIRE |
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