研究目的
To study the effect of replacing titanium by cobalt and molybdenum on the structural and electrical properties of BaTi0.5 (Co0.33 Mo0.17) O3 compound synthesized via sol-gel method.
研究成果
BaTi0.5 (Co0.33Mo0.17) O3 sample was successfully synthesized using sol-gel method. Rietveld analysis of X-ray diffraction confirmed the existence of a single phase tetragonal perovskite crystal structure with the P4mm space group. The electrical conductivity follows the 'universal' Jonscher power law and shows semiconductor behavior. The decrease of the exponent ‘n’ with increasing temperature confirms that the correlated barrier hopping (CBH) is the appropriate model for the AC conductivity. The variation of the dielectric constant and the dielectric loss is due essentially to the presence of the Maxwell–Wagner type of polarization. Impedance and electric modulus analysis proved the presence of thermally activated relaxation behavior.
研究不足
The study is limited to the structural and dielectric properties of BaTi0.5 (Co0.33 Mo0.17) O3 perovskite ceramic synthesized via sol-gel method. The electrical properties were studied over a frequency range of 30 - 106 Hz and temperature range of 420-640K.
1：Experimental Design and Method Selection:
The polycrystalline compound was synthesized using the sol-gel method with highly pure powders as precursors. The structural analysis was carried out through powder X-ray diffraction (XRD) using a Panalytical X pert Pro-diffractometer with Cu-Kα radiation. The dielectric analysis was determined using a Wayne-Kerr 6425 component analyzer.
2：Sample Selection and Data Sources:
Highly pure powders of starting materials (>99.9%) such as C12H28O4Ti, H8N2Mo2O7, CoCl2.6H2O, C4H6O4Ba were used as precursors.
3：9%) such as C12H28O4Ti, H8N2Mo2O7, CoCl6H2O, C4H6O4Ba were used as precursors.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Panalytical X pert Pro-diffractometer, Wayne-Kerr 6425 component analyzer, C12H28O4Ti, H8N2Mo2O7, CoCl2.6H2O, C4H6O4Ba.
4：6H2O, C4H6O4Ba.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The precursors were dissolved in distilled water and ethanol, mixed under magnetic stirring, heated to obtain a gel, dried, calcined, pressed into pellets, and sintered.
5：Data Analysis Methods:
The data were analyzed by the Rietveld refinement using the Full Proof program. The electrical conductivity was calculated from the experimental data of conductance.
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