研究目的
To develop and investigate a new ternary ferroelectric ceramic system with high Curie temperature and giant piezoelectric response suitable for high-temperature applications.
研究成果
The BS-xPT-PSN ceramics exhibit excellent piezoelectric properties with a high Curie temperature and giant piezoelectric response at 200°C, attributed to polarization rotation and extension mechanisms. They are promising for high-temperature electromechanical applications, with good thermal stability up to 200°C.
研究不足
The study is limited to specific compositions and temperatures; scalability and long-term stability in real-world applications are not fully addressed. The theoretical model relies on parameters from similar systems (PZT), which may not be perfectly accurate for BS-xPT-PSN.
1：Experimental Design and Method Selection:
The study involved synthesizing (0.95 ? x)BiScO3-xPbTiO3-0.05Pb(Sn1/3Nb2/3)O3 ceramics using solid-state reaction methods, with compositions near the morphotropic phase boundary (MPB) to enhance piezoelectric properties. Theoretical analysis using Landau-Ginsburg-Devonshire model was employed to understand mechanisms.
2：95 ? x)BiScO3-xPbTiO3-05Pb(Sn1/3Nb2/3)O3 ceramics using solid-state reaction methods, with compositions near the morphotropic phase boundary (MPB) to enhance piezoelectric properties. Theoretical analysis using Landau-Ginsburg-Devonshire model was employed to understand mechanisms. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Ceramics with x = 0.58–0.63 were prepared, selected based on stoichiometric compositions to explore the MPB region.
3：58–63 were prepared, selected based on stoichiometric compositions to explore the MPB region. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Raw materials included Bi2O3, Sc2O3, PbO, TiO2, SnO2, Nb2O5; equipment included X-ray diffractometer (D/Max 2500; Rigaku), SEM (S-4800; Hitachi), d33 meter (ZJ-3D; Institute of Acoustics), impedance analyzer (4294A; Agilent Technologies), ferroelectric testing system (aixACCT TF Analyzer 1000; aixACCT), high voltage amplifier (TREK 610E; TREK), and DART-PFM for domain imaging.
4：Experimental Procedures and Operational Workflow:
Powders were mixed, calcined, milled, pressed into pellets, sintered, polished, electroded, poled, and characterized for structural, dielectric, ferroelectric, and piezoelectric properties. Temperature-dependent measurements were conducted up to 300°C.
5：Data Analysis Methods:
Data were analyzed using standard techniques for XRD, SEM, impedance, hysteresis loops, strain curves, and PFM images; statistical averaging was used for reproducibility.
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X-ray diffractometer
D/Max 2500
Rigaku
Analyzing the phase and structure of sintered ceramic samples.
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Scanning electron microscope
S-4800
Hitachi
Imaging the fractured surface microstructure of ceramics.
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Impedance analyzer
4294A
Agilent Technologies
Measuring resonance and antiresonance frequencies for calculating electromechanical coupling factors and dielectric properties.
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d33 meter
ZJ-3D
Institute of Acoustics
Measuring the piezoelectric coefficient d33 of poled samples.
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Ferroelectric testing system
aixACCT TF Analyzer 1000
aixACCT
Measuring polarization-electric field hysteresis loops and field-induced strain curves.
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High voltage amplifier
TREK 610E
TREK
Providing high voltage for ferroelectric measurements.
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DART-PFM
Studying local polar domain structure and its evolution with temperature using piezoresponse force microscopy.
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