A5101653658- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Acoustic Wave Resonator Technologies
- Multiferroics and related materials
- Dielectric properties of ceramics
- Advanced Photocatalysis Techniques
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Electronic and Structural Properties of Oxides
- Quantum Dots Synthesis And Properties
- Copper-based nanomaterials and applications
- Analytical Chemistry and Chromatography
- Crystal structures of chemical compounds
- Crystallography and molecular interactions
- Environmental Chemistry and Analysis
- Dielectric materials and actuators
- Advanced ceramic materials synthesis
- Water Quality Monitoring and Analysis
- Perovskite Materials and Applications
- Organometallic Compounds Synthesis and Characterization
- Metal-Organic Frameworks: Synthesis and Applications
University of Science and Technology Beijing
2012-2025
Pennsylvania State University
2022
Tsinghua University
2013
The ultrahigh converse piezoelectric coefficient <italic>d</italic>*33 = 1444 pm V<sup>−1</sup> and strain 0.070%, which are the highest values reported so far in lead-free ceramics, were achieved at component of multiphase coexistence, suggesting that BaTiO<sub>3</sub>–CaTiO<sub>3</sub>–BaSnO<sub>3</sub> system is a promising alternative material for electromechanical actuator applications.
( Ba 1− x Ca )( Ti 0.92 Sn 0.08) O 3 = 0.00–0.06 mol) ceramics with a high relative density over 96% were prepared by conventional sintering method at 1480°C. At room temperature, polymorphic phase transition from orthorhombic to tetragonal was confirmed the XRD patterns in composition range of 0.04 ≤ 0.06. A piezoelectric coefficient d 33 up 568 pC/N obtained 0.05 mol, which is higher than other component , ) system. same time, corresponding planar electromechanical coupling factor k p...
Abstract Piezoelectric materials enable the conversion of mechanical energy into electrical and vice‐versa. Ultrahigh piezoelectricity has been only observed in single crystals. Realization piezoelectric ceramics with longitudinal constant ( d 33 ) close to 2000 pC N –1 , which combines crystal‐like high properties ceramic‐like cost effectiveness, large‐scale manufacturing, machinability will be a milestone advancement ceramic materials. Here, guided by phenomenological models phase‐field...
The phase structure in the (Ba,Ca)(Ti1−xSnx)O3 lead-free ceramics was evolved from inceptive orthorhombic (O) at 0 ≤ x 0.04 to a two-phase coexistence of pseudocubic-orthorhombic (PC-O) 0.06 0.10 and further multiphase rhombohedral-pseudocubic-orthorhombic (R-PC-O) = 0.11. Due R-PC-O room temperature proved by X-ray diffraction, dielectric constant εr differential scanning calorimetry, an ultrahigh piezoelectric coefficient d33 670 pC/N electrostrain 0.061% were achieved. high over 520...
Abstract Various CuS nanostructures, including nanoflowers, doughnut‐shaped nanospheres, dense and mixtures of nanoneedles, nanoparticles, nanoplates, were synthesized from different copper sulfur sources by a solvothermal method. The formation mechanisms along with photocatalytic properties for the degradation rhodamine B (RhB) under visible‐light irradiation investigated in this study. experimental results indicate that when source is fixed at CS(NH 2 ) reaction, spherical nanospheres...
A series of Li 2 CO 3 ‐added ( Ba 0.95 Ca 0.05 )( Ti 0.90 Sn 0.10 ) O BCTS ceramics were prepared by normal sintering at a low temperature 1300°C; Their microstructure and electrical property evaluation investigated with special emphases on the effect addition. Adding significantly improves sinterability ceramics, resulting in reduced more than 150°C. The coexistence R T phases is confirmed Raman spectrum room for all samples range from −80°C to 40°C sample 3% mol specific ratio phase...
Pb-free dielectric energy storage capacitors are core components in advanced pulse-power electronic systems and devices. However, the relatively low density (Wrec) for industrial pillar BaTiO3 (BT)-based remains a significant obstacle their cutting-edge applications, due to intrinsic polarization breakdown strength (EB). Herein, through chemical composition local structure design, giant Wrec of 15.1 J cm-3 along with high efficiency (η) 85% is demonstrated BT-based relaxor bulk ceramic. This...
Abstract High mechanical quality factor ( Q m ) and low loss are crucial for the performance of piezoelectric materials in high‐power applications. Although potassium sodium niobate (KNN) based ceramics promising candidates lead‐free due to their favorable environmental benefits, they traditionally face a trade‐off between high coefficient d 33 . To address this long‐standing issue, multivalent acceptor codoping strategy is presented that innovatively induces hierarchical domain structure...
Ultrahigh piezoelectric constant (d33 = 683 pC/N) and converse coefficient (dS/dE 1257 pm/V) were observed in CuO-doped lead-free (Ba,Ca)(Ti,Sn)O3 ceramics at an optimal composition fabricated by a conventional sintering method low temperature 1250 °C. Since all samples showed pure perovskite structure with coexisting multiphases including cubic, tetragonal, orthorhombic, rhombohedral phases around two converged triple points, good compositional stability of high piezoelectricity along d33...
(1–x)K0.48Na0.56NbO3–xBi0.5Li0.5ZrO3 (KNN–xBLZ, x = 0–0.06) lead-free piezoelectric ceramics were prepared by the conventional solid-state sintering method, and their phase structures electric properties as well TC systematically investigated. The orthorhombic–tetragonal (O–T) two phases detected in all at 0.01 ≤ 0.05. Due to appropriate ratio between O T (CO/CT= 45/55), high of d33 239 pC/N, kp 34%, Pr 25.23 μC/cm2 obtained 0.04. Moreover, a 348°C was also achieved KNN–xBLZ ceramic These...