研究目的
Investigating the enhancement of electrostrictive coefficient in bismuth sodium titanate-based ceramics by regulating the degree of diffuseness and phase composition.
研究成果
The addition of NaNbO3 increases the ratio of P4bm in BNT-based ceramics, strengthening the degree of diffuseness and effectively promoting the electrostrictive response. High Q33 values (0.033–0.037 m4/C2) nearly independent of the electric field (30–60 kV/cm) are realized, demonstrating the potential for accurate displacement control in actuators.
研究不足
The study is limited to the specific composition of ceramics and the effects of NaNbO3 doping. The strain from the electrostrictive effect is noted to be not tremendous, indicating potential areas for further optimization.
1：Experimental Design and Method Selection:
The study focuses on achieving strain with low hysteresis in ceramics through an electrostrictive effect, using a specific composition of ceramics.
2：Sample Selection and Data Sources:
Ceramics samples were prepared with varying compositions to study the effect of NaNbO3 doping on the electrostrictive properties.
3：List of Experimental Equipment and Materials:
X-ray diffraction for phase structure characterization, SEM for surface morphology observation, LCR analyzer for dielectric property testing, and a ferroelectric tester for P-E and S-E characterization.
4：Experimental Procedures and Operational Workflow:
Samples were prepared by conventional solid-state reaction method, characterized for their phase structure, surface morphologies, and dielectric properties, and then tested for their ferroelectric and strain responses under electric fields.
5：Data Analysis Methods:
The relationship between strain and polarization was analyzed to determine the electrostrictive coefficient, and the effect of phase composition on the electrostrictive response was studied.
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