A5101476595- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Multiferroics and related materials
- Acoustic Wave Resonator Technologies
- Dielectric materials and actuators
- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
- Antenna Design and Analysis
- Dielectric properties of ceramics
- Plasma Diagnostics and Applications
- Ultrasonics and Acoustic Wave Propagation
- Plasma Applications and Diagnostics
- High Entropy Alloys Studies
- Magnetic and transport properties of perovskites and related materials
- High-Temperature Coating Behaviors
- Advanced ceramic materials synthesis
- Additive Manufacturing Materials and Processes
- Advanced X-ray and CT Imaging
- Acoustic Wave Phenomena Research
- Plasma and Flow Control in Aerodynamics
- Engineering Applied Research
- Quantum Dots Synthesis And Properties
- Aeroelasticity and Vibration Control
- Optical Coatings and Gratings
- Fire Detection and Safety Systems
Xi’an International University
2019-2025
Air Force Engineering University
2011-2025
Xi'an Jiaotong University
2011-2024
Binzhou Medical University
2022
Binzhou University
2022
Guangxi University
2021
Shaanxi University of Science and Technology
2020
China XD Group (China)
2016-2019
Northwestern Polytechnical University
2006-2018
Shanghai Jiao Tong University
2017
A design methodology for developing lead-free bulk ceramics with large recoverable energy storage density was proposed in this study.
The findings in this study could broaden the applications of KNN materials a new field.
This review summarizes the development history of lead-free bulk ceramics for electrical energy storage applications and stress design strategies each type dielectric ceramic based on their special physical properties.
We prepared highly transparent relaxor ferroelectric ceramics based on (K<sub>0.5</sub>Na<sub>0.5</sub>)NbO<sub>3</sub>using a pressure-less solid-state sintering method without using hot isostatic pressing and spark plasma sintering.
Simultaneous achievement of a large <italic>W</italic><sub>rec</sub> 3.51 J cm<sup>−3</sup> and high <italic>η</italic> 80.1% in 0.86NN–0.14BNH ceramics under 350 kV cm<sup>−1</sup>, leading to an excellent comprehensive energy storage performance lead-free bulk ceramics.
A new strategy (coexistence of nanodomains and PNRs <italic>via</italic> composition optimization) was proposed to achieve high comprehensive energy storage properties in lead-free bulk ceramics.
Large energy storage density and high efficiency in Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>-based relaxor ferroelectric ceramic induced by AgNbO<sub>3</sub> doping.
Abstract The figure-of-merits of ferroelectrics for transducer applications are their electromechanical coupling factor and the operable temperature range. Relaxor-PbTiO 3 ferroelectric crystals show a much improved k 33 (88~93%) compared to ceramic counterparts (65~78%) by taking advantage strong anisotropy crystals. However, only few relaxor-PbTiO systems, example Pb(In 1/2 Nb )O -Pb(Mg 1/3 2/3 -PbTiO , can be grown into single crystals, whose range is limited rhombohedral-tetragonal phase...
A stepwise optimization route yields a general way to design synthetic ESP ceramics. NBT-BST-BMS-VPP ceramics obtain an ultrahigh W rec of 7.5 J cm −3 under 440 kV −1 .
Although relaxor ferroelectrics have been widely investigated owing to their various advantages, there are still impediments boosting energy-storage density (Wrec) and efficiency (η). In this paper, we propose a cooperative optimization strategy for achieving comprehensive outstanding performance in (Na0.5Bi0.5)0.7Sr0.3TiO3 (NBST)-based ceramics by triggering nonergodic-to-ergodic transformation optimizing the forming process. The first step of substituting NaNbO3 (NN) NBST generated an...
Abstract The increasing awareness of environmental concerns has prompted a surge in the exploration lead-free, high-power ceramic capacitors. Ongoing efforts to develop lead-free dielectric ceramics with exceptional energy-storage performance (ESP) have predominantly relied on multi-component composite strategies, often accomplished under ultrahigh electric fields. However, this approach poses challenges insulation and system downsizing due necessary working voltage such conditions. Despite...
An approach to further improve piezoelectric properties of (1−x)(K0.5Na0.5)NbO3–xLiNbO3 (KNLN) ceramics, i.e., the optimum poling temperatures (Tp) KNLN ceramics should be chosen near polymorphic phase transition temperatures, is proposed. This contrary conventional wisdom associated with electrical ceramics. Piezoelectric constant d33 (x=0.07) increases from 210to274pC∕N by selecting Tp. result indicates that this very effective in improving Moreover, can also applied other (K0.5Na0.5)NbO3 based
Lead-free relaxor ferroelectric ceramics have been widely explored for high power energy storage applications because of their polarization saturation and low remnant polarization.
Abstract Multilayer pulsed power ceramic capacitors require that dielectric ceramics possess not only large recoverable energy storage density ( W rec ) but also low sintering temperature (<950°C) for using the inexpensive metals as electrodes. However, lead‐free bulk usually show (<2 J/cm 3 and high (>1150°C), limiting their applications in multilayer capacitors. In this work, (~4.02 at 400 kV/cm) (940°C) are simultaneously achieved 0.9(K 0.5 Na )NbO –0.1Bi(Mg 2/3 Nb 1/3 )O –1.0...
The (1−x)(K0.5Na0.5)NbO3–x(Ba0.5Sr0.5)TiO3 (KNN-BST) solid solution has been synthesized by conventional solid-state sintering in order to search for the new lead-free relaxor ferroelectrics high temperature applications. phase structure, dielectric properties, and behavior of (1−x)KNN-xBST are systematically investigated. structure gradually changes from pure perovskite with an orthorhombic symmetry tetragonal symmetry, then pseudocubic phase, cubic increasing addition BST. 0.90KNN-0.10BST...