A5018665337- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Dielectric properties of ceramics
- Nuclear materials and radiation effects
- Electronic and Structural Properties of Oxides
- Electrical and Thermal Properties of Materials
- Physics of Superconductivity and Magnetism
- Advanced ceramic materials synthesis
- Radiation Detection and Scintillator Technologies
- Copper-based nanomaterials and applications
- Chalcogenide Semiconductor Thin Films
- ZnO doping and properties
- Acoustic Wave Resonator Technologies
- Perovskite Materials and Applications
- Gas Sensing Nanomaterials and Sensors
- Luminescence Properties of Advanced Materials
- Rare-earth and actinide compounds
Hefei University
2020-2025
Huazhong University of Science and Technology
2016-2018
Ministry of Education of the People's Republic of China
2016-2017
Abstract Piezoelectric ceramics are a kind of electronic ceramic materials with piezoelectric characteristics, which widely used in various fields because their unique electromechanical conversion characteristics. The Curie temperature (TC) and constant (d33) increased to ensure that the have good performance at higher operating temperatures. In this study, (1-x)(K0.5Na0.5)(Nb0.95Ta0.05)O3-x(Bi0.5Na0.5)(Zr0.5Ti0.5)O3 were prepared by traditional solid phase sintering process. By controlling...
Abstract In this study, (1‐ x )Bi 0.5 Na 0.46 Li 0.04 TiO 3 ‐ Bi 0.9 Sm 0.1 ScO (BNLT‐ BSS) relaxation ferroelectric ceramics were successfully prepared by conventional solid phase method. Multiscale analyses such as XRD and EDS confirmed that these form a solution with single‐phase perovskite structure. As the doping amount of increases, smaller grain size is obtained at = 0.1, breakdown strength increases to 350 kV/cm, resulting in higher W rec 5.92 J/cm , η 82.2%. addition, demonstrate...
Abstract Ba‐excess La‐doped BaTiO 3 ceramics have been successfully applied to prepare laminated chip thermistor. Ceramics were firstly fired in a high‐purity N 2 flow and then reoxidized air obtain positive temperature coefficient of resistivity effect. However, an abnormal reduction trend room‐temperature ( RT ) was found be always beginning at ~800°C during reoxidation. This anomaly closely correlated with the insulating second phase (Ba TiO 4 grain boundary, which destroyed conducting...
Abstract In this study, ZnO‐Bi 2 O 3 ‐based multilayer varistors ( MLV s) cofired with nickel (Ni) inner electrodes were prepared by tape‐casting method. Samples sintered in pure nitrogen (N ) to keep Ni from being oxidized, and then reoxidized air obtain the nonlinear properties (reduction‐reoxidation method). The EDAX results showed that are stable have no evident migration into ceramics when N . influence of reoxidation temperature on microstructures samples studied. at temperatures lower...
As one of the important raw materials for LED products, phosphors play an role. At present, spectrum lacks red light, resulting in poor quality white products and a low color rendering index (Ra <80), which affects lighting effects. To solve this problem, we synthesized SrGd 2 O 4 :Eu 3+ phosphor by high-temperature solid-phase method. The structure luminescence properties were studied means X-ray diffraction (XRD) measurements their emission excitation spectra, spectra analyzed. We also...
Abstract Here, the structural, magnetic, and dielectric features of breathing pyrochlore LiInCr 4−x Co x O 8 were investigated. The XRD analysis showed changes in Cr–Cr length distorted CrO 6 octahedral as ion doping level rises. x-ray photoemission spectroscopy measurements that there are both 2+ 3+ ions compounds. difference between temperature-dependent magnetization curves during field cooling zero-field suggested is a spin-glass state, which was verified by heat capacity measurement....
In this study, LiGaCr 4− x Fe O 8 ( = 0, 0.2, 0.4, 0.6) ceramics are synthesized using the solid‐phase reaction method. The effects of doping on lattice structure and dielectric properties systematically examined X‐ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, measurements. It is found from XRD analysis that evolution constant decreases 8.2552 Å at 0 to 8.2449 0.6, demonstrating a contraction with doping. SEM shows grain size reduction irregular structures...
Three series of Sr2Ir1-xMxO4 (M=Li, Zn, Sc) samples have been synthesized via solid state reaction technique. The influences Ir site doping by elements with different valence states (e.g., monovalent Li+, divalent Zn2+, and trivalent Sc3+) in Sr2IrO4 are investigated through a comparative study the lattice parameters, transport magnetic properties samples. insulator-to-metal transition has successfully realized Li Zn doped samples, while Sc present persistent insulating behavior. occurrence...
Sr 2 IrO 4 is predicted to be a new superconductor in theory, and its electric transport properties have attracted much attention the field of physics. Here we prepared series polycrystalline samples doped with 2-x Bi x (x=0,0.02,0.04,0.06,0.08) 2-y Dy y (y=0,0.02,0.04,0.06) respectively. The influence two ions on lattice structure electronic after substitution Ir site very similar, which makes overall reduction trend 6 octahedron Ir-O1-Ir bond angle. resistivity shows non-monotonic change...
Here, we report the evolution of physical properties Eu-doped polycrystalline perovskite iridates Sr 2- x Eu IrO 4 (x=0, 0.02, 0.04, 0.06). It is found that substituting 3+ for 2+ retains I 41/ acd crystal structure but causes rotation IrO6-octahedra decreases so bond angle Ir-O1-Ir increases. The SEM micrographs indicate average grain size decreases, while distribution increases with doping. Compared resistivity parent material, all doped materials show an increase, which can be further...