研究目的
Investigating the electrical and relative dielectric permittivity of substitution of BNT-BT with Ta, analyzing AC conductivity depending on temperature and frequency, and calculating and analyzing activation energy in different ranges of frequency.
研究成果
Ta dopants improved conduction properties and appears to be acting as an ionic transport bridge. The activation energy and AC conductivity of a Ta doped 0.94(Bi0.5Na0.5TiO3–0.06BaTiO3 ceramics related with sintering time.
研究不足
The study is limited to the analysis of Ta doped 0.94(Bi0.5Na0.5TiO3–0.06BaTiO3 ceramics and does not explore other dopants or materials. The experimental conditions are specific to the materials and methods used.
1：Experimental Design and Method Selection:
Ta doped
2：94(Bi5Na5TiO3–06BaTiO3 ceramics was prepared for AC conductivity and impedance analysis. Sample Selection and Data Sources:
0～
3：02 mol Ta doped 94(Bi5Na5TiO3–06BaTiO3 ceramics was prepared from Bi2O3, Na2CO3, BaCO3, Ta2O5 and TiO2 powders with purity of 9% by a conventional mixed oxide and carbonate method. List of Experimental Equipment and Materials:
Zirconia balls, polyvinyl alcohol (PVA), silver pastes, HP 4194A impedance analyzer.
4：Experimental Procedures and Operational Workflow:
The powders were mixed, dried, calcined, ball milled, pressed into disks, sintered, polished, and silver pastes were applied. The samples were then dried.
5：Data Analysis Methods:
The frequency and temperature dependent relative dielectric permittivity of these samples was analyzed through HP 4194A impedance analyzer.
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