研究目的
Investigating the electrical properties and thermal expansion characteristics of lead-free piezoelectric ceramics doped with praseodymium, sintered at a low temperature, to explore their potential as alternatives to lead-based materials in electronic components.
研究成果
The study demonstrates that praseodymium-doped BCEZT ceramics can be effectively prepared at a low sintering temperature of 1240°C, exhibiting diversified electrical properties influenced by varying oxygen vacancies and defect complexes. The optimal electrical properties were obtained at x = 0.30 mol%, suggesting potential applications in multifunctional electronic components.
研究不足
The study is limited to the effects of praseodymium doping on the electrical and thermal expansion properties of BCEZT ceramics. The research does not explore the effects of other rare-earth elements or the combination of multiple dopants.
1：Experimental Design and Method Selection:
The ceramics were prepared by conventional solid-state reaction method using nanoparticles synthesized via a modified Pechini method. The structural, morphological, electrical, and thermal expansion properties were systematically investigated as a function of varying praseodymium contents (x).
2：Sample Selection and Data Sources:
Samples with x = 0–0.75 mol% were prepared and characterized.
3：75 mol% were prepared and characterized. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: X-ray powder diffraction (XRD; Mini Flex 600), Raman spectroscopy (HORIBA JOBIN YVON), precision electronic balance (ES-220D), field emission-scanning electron microscopy (FESEM; S4800), dielectric measurement system (HDMS-1000V), radiant precision workstation (PREMER II), quasistatic piezoelectric constant testing meter (ZJ-3AN), precision impedance analyzer (Keysight 4990A), dilatometer (DIL 402).
4：2). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The ceramics were sintered at 1240°C for 5 h. Silver pastes were sintered on both sides of polished samples for electrodes. The samples were polarized in a silicon oil bath with an applied direct-current electric field.
5：Data Analysis Methods:
The lattice parameters were calculated by Rietveld refinement software. The dielectric, ferroelectric, and piezoelectric properties were analyzed using various measurement systems.
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-
X-ray powder diffraction
Mini Flex 600
Investigate the crystal structure and phase purity of the ceramics
-
Raman spectroscopy
HORIBA JOBIN YVON
Detect the symmetry and structure defects of the samples
-
precision electronic balance
ES-220D
Detect the densification of the ceramics based on Archimedes immersion principle
-
field emission-scanning electron microscopy
S4800
Measure the fractured morphology of the ceramics
-
dielectric measurement system
HDMS-1000V
Investigate temperature dependence of the relative dielectric constant and dielectric loss
-
radiant precision workstation
PREMER II
Measure the polarization–electric field hysteresis loops
-
quasistatic piezoelectric constant testing meter
ZJ-3AN
Determine the piezoelectric constants at room temperature
-
precision impedance analyzer
Keysight 4990A
Detect the mechanical quality factors and electromechanical coupling factors with the resonance method
-
dilatometer
DIL 402
Detect thermal expansion behaviors of the samples
-
登录查看剩余7件设备及参数对照表
查看全部
