研究目的
To investigate the effects of Sr2MnSbO6 doping on the ferroelectric and piezoelectric properties of Bi0.5Na0.5TiO3-BaTiO3 ceramics, aiming to achieve large electric-field-induced strain for actuator applications as a lead-free alternative.
研究成果
Trace SMS doping significantly alters the ferroelectric and piezoelectric properties of BNBT6.5 ceramics, with composition x=0.003 achieving a high unipolar strain of 0.4% and normalized strain of 728 pm/V due to reversible electric-field-induced phase transition. This makes it a promising lead-free alternative for actuator applications, with recommendations for future studies on domain structure and broader compositional ranges.
研究不足
The study is limited to specific compositions of BNBT6.5-xSMS ceramics prepared by solid-state reaction. Potential optimizations include exploring other doping levels or alternative synthesis methods to further enhance properties. The PFM resolution may not clearly distinguish nano-sized domains, and surface effects could influence observations.
1：Experimental Design and Method Selection:
The study used a conventional solid-state reaction method to fabricate ternary system ceramics. The rationale was to modify BNBT6.5 with SMS to induce phase transitions and enhance strain properties. Theoretical models involved ferroelectric and relaxor phase behavior analysis.
2：5 with SMS to induce phase transitions and enhance strain properties. Theoretical models involved ferroelectric and relaxor phase behavior analysis.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Ceramic samples with compositions BNBT6.5-xSMS (x=0 to 0.00875) were prepared. Selection criteria were based on varying SMS content to study its effects on phase structure and electrical properties.
3：5-xSMS (x=0 to 00875) were prepared. Selection criteria were based on varying SMS content to study its effects on phase structure and electrical properties.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: High purity chemicals including Bi2O3, Na2CO3, BaCO3, TiO2, SrCO3, MnO2, Sb2O3, and polyvinyl alcohol (PVA) as binder. Equipment included XRD (Rigaku MinFlex 600), FE-SEM (JSM6700-F), ferroelectric analyzer (TF Analyzer 2000 FE-module), laser interferometer, piezo-d33 meter (ZJ-3AN), LCR analyzer (TH2816A), and SPM (Dimension Icon, Bruker).
4：Experimental Procedures and Operational Workflow:
Powders were mixed, milled, pre-sintered at 850°C, re-milled, pressed into pellets, binder burned off at 650°C, and sintered at 1150°C. Electrical properties were measured after applying silver electrodes and poling. Measurements included P-E, I-E, S-E loops, d33, dielectric constant, and PFM imaging.
5：Data Analysis Methods:
Data were analyzed using statistical techniques for hysteresis loops, strain calculations, and phase transition temperatures. Software tools specific to the analyzers were used for data collection and processing.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
