A5087344258- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Acoustic Wave Resonator Technologies
- Microwave Dielectric Ceramics Synthesis
- Dielectric properties of ceramics
- Dielectric materials and actuators
- Magnetic and transport properties of perovskites and related materials
- Fluid Dynamics and Vibration Analysis
- Catalytic C–H Functionalization Methods
- Perovskite Materials and Applications
- Wind and Air Flow Studies
- Aerodynamics and Acoustics in Jet Flows
- Robotic Path Planning Algorithms
- Robotics and Sensor-Based Localization
- Advanced Sensor and Energy Harvesting Materials
- Ocular Oncology and Treatments
- Advanced MEMS and NEMS Technologies
- Catalytic Alkyne Reactions
- Flame retardant materials and properties
- Ferroelectric and Negative Capacitance Devices
- Nanoplatforms for cancer theranostics
- Electronic and Structural Properties of Oxides
- Cyclopropane Reaction Mechanisms
- Semiconductor materials and devices
- Optical and Acousto-Optic Technologies
University of Science and Technology of China
2025
Sichuan University
2016-2025
Gansu Provincial Hospital
2025
Gansu University of Traditional Chinese Medicine
2025
State Key Laboratory of Polymer Physics and Chemistry
2025
Chinese Academy of Sciences
2025
Changchun Institute of Applied Chemistry
2025
Shanghai University of Engineering Science
2025
Mongolian National University of Medical Sciences
2024
Tianjin Medical University
1990-2023
Environment protection and human health concern is the driving force to eliminate lead from commercial piezoelectric materials. In 2004, Saito et al. [Saito al., Nature, 432, 84.] developed an alkali niobate-based perovskite solid solution with a peak constant d33 of 416 pC/N when prepared in textured polycrystalline form, intriguing enthusiasm developing high-performance lead-free piezoceramics. Although much attention has been paid on system past ten years, no significant breakthrough its...
The structural origin of enhanced piezoelectric performance and stability in KNN-based ceramics can be attributed to the hierarchical nanodomain architecture with phase coexistence.
The inherent disadvantage of lead-free potassium sodium niobate (KNN)-based ceramics is the severe temperature instability piezoelectric charge coefficient (d33 ) caused by polymorphic phase boundary. Herein, a new concept structural gradient proposed designing compositionally graded multilayer composites with multiple successive transitions, to solve challenge inferior stability. exhibit superior reliability remains almost unchanged in range 25-100 °C), far outperforming previously reported...
Abstract Bismuth ferrite (BFO)‐based ceramics with large electromechanical response are important in electronic device applications. To better understand their physical mechanisms, a new phase diagram established by temperature dependence of dielectric properties, piezoelectric coefficient, and the evolution properties is proposed to explain contribution strain comparing ferroelectric (FE) relaxor (RFE) compositions. The FE components macrodomains have constant ( d 33 412 pC/N) at high...
To protect the environment and human health, it is necessary to develop high-performance lead-free piezoceramics replace lead-based ones in some electronic devices. Here we report first a large piezoelectricity (K,Na)NbO3-based prepared by conventional solid-state method. The rhombohedral–tetragonal phase boundary observed ceramics with composition of 0.04 ≤ x 0.06. Those 0.01 0.06 possess good comprehensive performance d33 (380–460 pC N−1) TC (170–287 °C). Moreover importantly, peak ∼460...
Multi-scale thermal stability of (K,Na)NbO<sub>3</sub>-based perovskites with a high <italic>d</italic><sub>33</sub> 430 pC N<sup>−1</sup> is investigated, revealing the origin its large piezoelectricity.
We have attained both large piezoelectricity and high strain in (1 − x)(K0.40Na0.60)(Nb0.955Sb0.045)O3–xBi0.50Na0.50ZrO3 [(1 x)KNNS–xBNZ] lead-free ceramics by forming a rhombohedral (R) tetragonal (T) phase boundary. The with 0.035 < x 0.05 possess R T phases' coexistence. A d33 value of ∼450 pC N−1 has been when the reached 0.04 owing to involved R–T boundary, which is higher respect ∼ 416 textured (K,Na,Li)(Nb,Ta,Sb)O3 reported Saito et al. [Nature, 2004, 432, 84]. In addition, it worth...
A flexible piezoelectric nanogenerator (PENG) was fabricated based on a new inorganic KNN–BNZ–AS–Fe, which exhibited the great potential in energy harvesting and self-powered mechanosensing.
ConspectusThe increasing world energy crisis drives humans to harvest the in nature as much possible without heavily damaging environment. However, most of cannot be used directly. Therefore, pursuing technologies or matter that can directly interconvert different energies has been one cutting-edge fields science and technology. Such a magic ability exists true-life piezoelectric materials generate charge when being given force vice versa, rendering them highly promising for harvesting...
The obvious conflicts between large piezoelectricity and high strain could be solved by developing new phase boundaries in potassium–sodium niobate materials.
The piezoelectricity of (K,Na)NbO3 ceramics strongly depends on the phase boundary types as well doped compositions. Here, we systematically studied relationships between compositions and in (K,Na) (Nb,Sb)O3–Bi0.5Na0.5AO3 (KNNS-BNA, A = Hf, Zr, Ti, Sn) ceramics; then their can be readily modified. Their are determined by elements. rhombohedral-tetragonal (R–T) driven range 0.035 ≤ BNH 0.040 BNZ 0.045; an orthorhombic-tetragonal (O–T) is formed composition 0.005 BNT 0.02; a pure O only...
The influences of site engineering (<italic>e.g.</italic>, Bi or Fe site) as well the doped element types on their piezoelectricity have been comparatively analyzed.
The objective of this work is to achieve a giant piezoelectric constant in (K,Na)NbO3-based lead-free ceramics, and then 0.96K0.46Na0.54Nb0.95Sb0.05O3-0.04Bi0.5(Na0.82K0.18)0.5ZrO3 piezoceramics were designed prepared by optimizing the sintering temperature (TS). rhombohedral-tetragonal phase boundary found ceramics sintered at 1070 ∼ 1105 °C suppressed when low TS 1060 1065 °C. threshold for terms their ferroelectric properties owing difference microstructure, large d33 388 465 pC/N could...
Here we report a strong piezoelectric activity in (1 – x)(K0.4Na0.6)(Nb0.96Sb0.04)O3-xBi0.5K0.5Zr1–ySnyO3 lead-free ceramics by designing different phase boundaries. The boundaries concerning rhombohedral-orthorhombic-tetragonal (R-O-T) and rhombohedral-tetragonal (R-T) multiphase coexistence were attained changing BKZS Sn contents then identified the X-ray diffraction patterns as well temperature-dependent permittivity ν1 Raman modes associated with BO6 perovskite octahedron. A high strain...
Enhanced piezoelectricity and ferroelectricity can be achieved in (1 −<italic>x</italic>)Bi<sub>1.05</sub>Fe<sub>1−y</sub>A<sub>y</sub>O<sub>3</sub>–<italic>x</italic>BaTiO<sub>3</sub>ceramics with A = Sc, Ga, Al due to the involvement of R–C phase boundary.
The electrocaloric effect (ECE) is significantly critical for environmentally friendly cooling technologies to replace vapor compression-based refrigeration. Lead-free bismuth sodium titanate-based ferroelectrics have attracted considerable attention because of their depolarization process, which can induce a high ECE. However, temperature (Td) disobeys the principle room (RT) cooling. Considerable efforts been devoted shift Td near RT via chemical doping, while corresponding ferroelectric...