研究目的
Investigating the effect of BaTiO3 (BT) addition on structural, dielectric and electrical properties of CaCu3Ti4O12 (CCTO) ceramic.
研究成果
The addition of BaTiO3 into CCTO system lowered the crystallite size and increased the dielectric constant by four orders compared to pure CCTO. The impedance analysis confirmed the presence of non-Debye type relaxation phenomenon and exhibited a negative temperature coefficient of resistance behaviour.
研究不足
The study is limited to the synthesis and characterization of (1-x)CCTO-xBT ceramics. The potential areas for optimization include the control of manufacturing operations such as method, substitution, sintering time or temperature and calcinations time or temperature to improve the dielectric properties.
1：Experimental Design and Method Selection:
The ceramic samples were synthesized by solid state route. The structural studies were carried out by X-ray diffraction technique. Raman spectroscopy was used to study the relationship between Raman lines and different types of atomic motions. The electrical properties were measured as a function of frequency and temperature by using an impedance analyzer.
2：Sample Selection and Data Sources:
High-purity oxides and carbonates were used as starting materials. The powders were weighed in stoichiometric proportion and milled for 1 h.
3：List of Experimental Equipment and Materials:
X-ray diffractometer (XPERT-PRO), micro Raman spectrometer, impedance analyzer, high-purity oxides and carbonates (CaCO3, CuO, TiO2, BaCO3).
4：3).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The powders were milled, dried, calcined, mixed, pressed into pellets, sintered, and coated with silver paste for electrical measurements.
5：Data Analysis Methods:
The crystal structure was determined by X-ray diffraction. Raman spectra were collected at room temperature. The electrical properties were analyzed using complex impedance plane by using the Cole-Cole function.
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