研究目的
Investigating the structural, piezoelectric, and high-density energy storage properties of lead-free BNKT-BCZT solid solution.
研究成果
The binary solid solutions of BNKT-BCZT show relaxor behavior, good diffused phase transition character, and improved energy storage efficiency for compositions x=0.02 and x=0.04. The composition x=0.02 shows the highest strain and energy storage efficiency.
研究不足
The study is limited to the compositions with x=0.00, 0.02, 0.04, 0.06, 0.08. The effect of higher concentrations of BCZT on BNKT was not investigated.
1：Experimental Design and Method Selection:
Conventional solid-state reaction route was used to synthesize the solid solution. Modified Curie Weiss law and Vogel-Fulcher law were employed to study the diffusivity and activation energy.
2：Sample Selection and Data Sources:
Reagent grade oxides and carbonates were used as starting raw materials.
3：List of Experimental Equipment and Materials:
X-ray diffractometer, Raman spectrometer, SEM, impedance analyzer, ferroelectric loop tracer, high voltage Fotonic sensor setup.
4：Experimental Procedures and Operational Workflow:
The raw mixture was calcined, sintered, and then characterized for structural, microstructural, dielectric, ferroelectric, piezoelectric properties.
5：Data Analysis Methods:
Dielectric constant and loss tangent were recorded, ferroelectric and piezoelectric hysteresis loops were analyzed.
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X-ray diffractometer
Smart lab
Rigaku
Structural characterization of calcined powders
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SEM
JSM-6390 LV
JEOL
Microstructure observation of Pt polished pellets
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Raman spectrometer
in Via
Renishaw
Structural characterization of calcined powders
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Impedance analyzer
SI 1260
Solartron
Recording dielectric constant and loss tangent
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Ferroelectric loop tracer
Precision Premier II
Radiant Tech.
Recording ferroelectric hysteresis loop
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High voltage Fotonic sensor
MTI-2100
MTI Instrument Inc.
Recording piezoelectric hysteresis loop
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