A5016288127- Ferroelectric and Piezoelectric Materials
- Dielectric materials and actuators
- Microwave Dielectric Ceramics Synthesis
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Multiferroics and related materials
- Supercapacitor Materials and Fabrication
- Acoustic Wave Resonator Technologies
- Advanced ceramic materials synthesis
- Advanced Battery Technologies Research
- Extraction and Separation Processes
- Advanced battery technologies research
- Dielectric properties of ceramics
- Perovskite Materials and Applications
- High voltage insulation and dielectric phenomena
- Vibration Control and Rheological Fluids
- Semiconductor materials and interfaces
- Anodic Oxide Films and Nanostructures
- Quantum and electron transport phenomena
- Ferroelectric and Negative Capacitance Devices
- Polymer Nanocomposite Synthesis and Irradiation
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Electromagnetic wave absorption materials
Sichuan University
2022-2025
China University of Mining and Technology
2023-2025
Chengdu University of Technology
2019-2023
State Key Laboratory of New Ceramics and Fine Processing
2018-2022
Tsinghua University
2018-2022
The designed 0.8BNTSZ–0.2NN ceramic demonstrates superb temperature stability with a capacitance variation <±15 from −55 °C to 545 °C.
Abstract The growing demand for high-power-density electric and electronic systems has encouraged the development of energy-storage capacitors with attributes such as high energy density, capacitance voltage frequency, low weight, high-temperature operability, environmental friendliness. Compared their electrolytic film counterparts, multilayer ceramic (MLCCs) stand out extremely equivalent series resistance inductance, current handling capability, stability. These characteristics are...
Dielectric ceramics are crucial for high-temperature, pulse-power energy storage applications. However, the mutual restriction between polarization and breakdown strength has been a significant challenge. Here, multiphase engineering controlled by two-step sintering heating rate is adopted to simultaneously obtain high in 0.8(0.95Bi0.5Na0.5TiO3–0.05SrZrO3)–0.2NaNbO3 (BNTSZNN) ceramic systems. The coexistence of tetragonal (T) rhombohedral (R) phases benefits temperature stability BNTSZNN...
Four BT-based ceramic samples were prepared using a grain grading approach. The bigger-grained (∼100 nm) and smaller-grained (∼70 BaTiO3 (BT) powders mixed. The BT powder controlled the average size guaranteed reliability, while enhanced dielectric constant. Various percentages of introduced to balance As proportion bigger grains increased, constant (εr) improved significantly. room-temperature εr 25% bigger-grain mixed (2623) was ∼50% higher than that sample with similar without grading....
A fast heating assisted two-step sintering method is developed to fabricate multilayer ceramic capacitors with ultrahigh energy-storage density and efficiency.
Abstract BaTiO 3 ‐(Bi 0.5 Na )TiO (BTBNT)‐based multilayer ceramic capacitor (MLCC) chips with the inner electrodes being Ag0.6/Pd0.4 are prepared by a roll‐to‐roll casting method. The BTBNT‐based MLCC ten‐dielectric layers can be sintered very well at low temperature of 1130°C via two‐step sintering (TSS). X‐ray diffraction (XRD) and transmission electron microscope (TEM) results show that core‐shell structure two phases coexistence. core exhibits tetragonal phase room then gradually...
A record-high breakdown strength (790 kV cm<sup>−1</sup>) and high energy density (5.04 J cm<sup>−3</sup>) are obtained in BTAS/BTBZNT ceramics with a layer-by-layer structure.
BNT (Bi0.5Na0.5TiO3)-based ferroelectric ceramics have drawn much attention in energy storage applications due to the high saturation polarization and good temperature stability. However, reduction of Ti4+ caused by volatilization Bi Na elements during high-temperature sintering is a huge problem. A multivalent element (Mn) adopted this work prevent thus enhance breakdown strength simultaneously. Various contents MnO2-doped 0.76Bi0.5Na0.5TiO3–0.04SrZrO3–0.2NaNbO3 (BNTSZNN) were prepared...
High-temperature dielectric ceramics are required for various emerging applications. However, controlling the loss at high temperatures remains a significant challenge due to substantial leakage current temperatures. In this work, 0.76Bi0.5Na0.5TiO3–0.2NaNbO3–0.04Sr(ZrMgx)O3+x (BNT–NN–SZMx) lead-free were constructed by introducing trace MgO suppress space charge migration, reduce current, and enhance breakdown strength of ceramic. The BNT–NN–SZM0.05 ceramic showed excellent stability in...
Lead-free 0.985(0.96KNNT–0.04BNKZ)–0.015CZ ceramics were sintered at 1150–1190 °C.
Abstract The ultra‐thin multilayer ceramic capacitors (MLCCs) with layer thickness less than 1 μm or even 0.5 are in urgent demand due to the rapid development of modern electronic industries. Notably, dielectric and ferroelectric properties nanograined BaTiO 3 ‐based ceramics, which widely used as materials MLCCs, highly related grain size. In this work, ceramics various sizes (50‐100 nm) were prepared via chemical coating method. size effect on energy storage systematically investigated....
Abstract Fine‐grained BaTiO 3 ‐based ceramics with an average grain size of 120−140 nm were prepared by a chemical coating method. The effect Ho‐Dy concentration on the microstructure, dielectric properties, and reliability nanoceramics was investigated. Results showed that appropriate doping contents Ho Dy provide highest constant 2323 at room temperature stability satisfied EIA X7R specification. Higher specimens exhibit lower but gentler stability, indicating thicker shells. failure time...
Abstract Vanadium oxides are attracted cathodes for aqueous zinc batteries owing to their high capacity. However, the limited cyclability of vanadium‐based oxide cathodes, especially at low current densities, impedes practical application. Here, it is revealed that proton insertion responsible lifetime vanadium oxides. Proton promotes dissolution oxides, deteriorating electrochemical performance. Propylene carbonate (PC) introduced into Zn(CF 3 SO ) 2 electrolyte regulate coordination...
With the massive application of lithium-ion batteries in electric vehicles, spent lithium iron phosphate (LFP) have accumulated recent years, inducing an urgent requirement recycling technology. Direct repair technology has been considered as a promising approach for LFP. However, traditional solid-phase is limited by heterogeneous contact between source and Herein, polyacrylonitrile (PAN) was selected additive to facilitate intimate PAN displays strong interaction with defective LFP,...
Multilayer ceramic capacitors (MLCCs) are attracting great interest recently, especially in energy-storage applications due to their high volumetric capacitance, power density, and fast charge-discharge capability. However, the low dielectric breakdown strength of ferroelectric ceramics always leads a discharge energy which limits high-voltage systems. In this work, phase-field electromechanical model is introduced give fundamental understanding behavior MLCCs provide resource-efficient...