A5103190567- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Microwave Dielectric Ceramics Synthesis
- Dielectric materials and actuators
- Acoustic Wave Resonator Technologies
- Dielectric properties of ceramics
- Geophysics and Sensor Technology
- Acoustic Wave Phenomena Research
- Underwater Acoustics Research
- Nuclear Materials and Properties
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Liquid Crystal Research Advancements
- Semiconductor materials and devices
- Machine Learning in Materials Science
- Thermodynamic and Structural Properties of Metals and Alloys
- Shape Memory Alloy Transformations
- Electronic and Structural Properties of Oxides
Shanghai Institute of Ceramics
2012-2021
Chinese Academy of Sciences
2012-2021
University of Chinese Academy of Sciences
2020
Tongji University
2019
Shanghai Normal University
2019
Institute of Process Engineering
2013-2014
Novel environment-friendly NaNbO<sub>3</sub>-based lead-free ceramics with ultrahigh energy storage density and power for multilayer ceramic capacitor applications.
Bismuth titanate (Bi4Ti3O12, BIT) piezoelectric materials have attracted increasing attention due to their high-temperature applications. However, it is quite challenging simultaneously achieve outstanding properties and high Curie temperature in BIT-based systems. In this study, oxygen vacancy defects tailoring strategy was utilized solve problem, excellent coefficient (32.1 pC/N), ultrahigh (659 °C) are gotten Bi4Ti3-x(Mn1/3Nb2/3)xO12 (BTMN) ceramics, which among the top values ceramics....
BiFeO3-BaTiO3 ceramics possess both high electromechanical properties and a Curie temperature, which are promising temperature lead-free piezoactuator materials. However, the poor thermal stability of electrostrain limits their practical exploration. Here, we report stable 0.18% at 6 kV/mm, with variation 13% from 25 °C to 175 for (1-x)(0.67BiFeO3-0.33BaTiO3)-xSr0.8Bi0.1◻0.1TiO2.95 solid solutions x = 0.04. The addition relaxor ferroelectric Sr0.8Bi0.1◻0.1TiO2.95 (SBT) breaks long range...
Abstract As one of the most promising candidates high‐temperature piezoelectric sensors, BiScO 3 ‐PbTiO (BS‐PT)‐based ceramics are commonly modified by end‐member substitution to modify phase structures and electrical properties. In this work, BS‐PT‐based with various grain sizes (1.4‐3.7 μm) composition 0.98(0.36BiScO ‐0.64PbTiO )‐0.02Bi(Sn 1/3 Nb 2/3 )O were prepared conventional solid‐state reaction method at different sintering temperatures from 1100℃ 1180℃. X‐Ray diffraction results...
The application of piezoelectric ceramics at high temperature is limited because they can't have both coefficient and Curie temperature. While, BiScO3–PbTiO3-based possessing properties simultaneously drawn increasing attention due to their potential applications Here, we reported a novel compositional design (1-x)[0.36BiScO3-0.64PbTiO3]-xBi(Sn1/3Nb2/3)O3 (abbreviated as BS-PT-xBSN). BS-PT-xBSN ceramic samples were synthesized by conventional solid state reaction method. According the...
Highly (001) oriented ( K , Na ) NbO 3 KNN lead‐free piezoelectric thin films were grown on LaNiO LNO )‐coated silicon by RF magnetron sputtering. The effects of the top electrodes electrical properties investigated. dielectric and remarkably improved in / (ε r = 899 at 1 kHz, d 33 58 pm/V), compared with that Pt 584 26 pm/V). An enhanced ferroelectricity was also obtained a remnant polarization 12 μC/cm 2 maximum 23 applied field 200 kV/cm. Besides, temperature dependence piezoelectricity...
A clamping domain structure is proposed to improve the amount of non-180° switching in BaTiO3 based piezoelectric ceramics. Experimental results show a large unipolar strain 0.23% at 5 kV/mm aged 0.5 mol. % Mn doped ceramics with structures, and normalized (d33* = Smax/Emax) reaches 600 pm/V low electric fields 2 or 3 kV/mm. In contrast, pure structures exhibit no clear polarization constriction enhancement Electron paramagnetic resonance spectra verify existence titanium vacancies, Mn2+...
The dynamic hysteresis of Nb-doped Pb(ZrxTi1−x)O3 (PZT, 0.40 ≤ x 0.60) ceramics with different phase structures was investigated as functions frequency f and electric field amplitude E0. When E0 grows over ∼1.5 times coercive Ec, all the loops become well saturated their scaling relations area ⟨A⟩ against can be expressed an identical form ⟨A⟩∝f0.01E00.10 for either tetragonal or morphotropic phase, which is in good agreement our previous result rhombohedral PZT [Chen et al., J. Appl. Phys....
In this work, the 0.68BiFeO3-0.32BaTiO3 (BFBT) ferroelectric thin film was fabricated with high maximum polarization for energy storage applications. BFBT pure perovskite phase deposited on Pt/Ti/SiO2/Si substrates at 600°C by Pulsed Laser Deposition (PLD) method. We measured hysteresis, dielectric properties and fatigue performance of thickness about 200 nm. It found that has a field-induced value 86 μC/cm2. Under an applied low electric field 900 kV/cm, recoverable density (Ure) could...
The scaling behaviors of dynamic hysteresis were investigated in serial rhombohedral Nb-doped Pb(Zr1-xTix)O3 (PZT) bulk ceramics as a function frequency (f) and field amplitude (E0). Three distinct regions plotted including linear loops, minor saturated loops with an increase E0. When the external fields over ∼1.5 times coercive (Ec), relations for these PZT could be expressed identical form area ⟨A⟩ ∝ f 0.01E00.10, which indicated that similar ferroelectric systems different compositions...
Abstract Phase structure has a strong influence on the temperature stability of ceramics; however, their BiScO 3 ‐xPbTiO been neglected. To meet requirements for practical applications, (0.98‐x)BiScO ‐0.02Bi(Sn 1/3 Nb 2/3 )O (BS‐xPT‐BSN, 0.59 ≤ x 0.65) polycrystalline ferroelectrics with rhombohedral phase, morphotropic phase boundary ( Cm and P4mm coexisting), tetragonal prepared studied. The relationship between structures is established from macro properties as well underlying domain...
Grain size effect on piezoelectric properties and thermal stability of perovskite layer structured (PLS) Sr 2 Nb O 7 ceramics are investigated. The with different average grain sizes from 1.2[Formula: see text][Formula: text]m to 3.6[Formula: were prepared in sintering temperatures by solid state reaction method. increases, accompanied a higher relative density up 96%. Pure larger show remarkable [Formula: text] ([Formula: text])pC/N while still very high text]C. depolarization temperature...
Abstract The negative electric field, field cycling and frequency dependence of strain memory effect in poled aged Mn‐doped Pb(Mn 1/3 Sb 2/3 )O 3 –Pb(Zr,Ti)O ( PMS – PZT ) piezoceramics under sesquipolar loading were investigated. is especially sensitive to the applied field. Maximum 0.32% achieved when around coercive ~2.1 kV/mm, which can be ascribed partially depoled state with randomized domains. And this shows very good stability, varying less than 5% up 10 4 cycles, while almost 40%...