A5043524089- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Luminescence Properties of Advanced Materials
- Multiferroics and related materials
- Acoustic Wave Resonator Technologies
- Dielectric properties of ceramics
- Electronic and Structural Properties of Oxides
- Ammonia Synthesis and Nitrogen Reduction
- Adsorption and biosorption for pollutant removal
- Organic and Molecular Conductors Research
- Magnetism in coordination complexes
- Chemical and Physical Properties in Aqueous Solutions
- Nanomaterials for catalytic reactions
- Advanced Welding Techniques Analysis
- Minerals Flotation and Separation Techniques
- Aluminum Alloys Composites Properties
- Perovskite Materials and Applications
- Gas Sensing Nanomaterials and Sensors
- Advanced Condensed Matter Physics
- Thermodynamic properties of mixtures
- Advancements in Solid Oxide Fuel Cells
- Magnetic and transport properties of perovskites and related materials
- Ionic liquids properties and applications
- Advanced Polymer Synthesis and Characterization
- Remote Sensing in Agriculture
Henan University
2025
National Institute of Metrology
2025
Henan University of Technology
2024
Queen Mary University of London
2019-2024
Institute of High Energy Physics
2022-2023
Chinese Academy of Sciences
2005-2023
China Spallation Neutron Source
2023
Shenyang Aerospace University
2013-2020
Central South University
2015-2019
Institute of Chemistry
2016
The Na and Ce co-doped CaBi<sub>4</sub>Ti<sub>4</sub>O<sub>15</sub> (CBT)<sub> </sub>Aurivillius ceramics in a Ca<sub>1-<em>x</em></sub>(Na<sub>0.5</sub>Ce<sub>0.5</sub>)<em><sub>x</sub></em>Bi<sub>4</sub>Ti<sub>4</sub>O<sub>15</sub> (CNCBT, <em>x </em>= 0, 0.03, 0.05, 0.08 0.12) system were synthesized by the conventional solid-state sintering method. All compositions show single-phase orthorhombic (space group <em>A</em>2<sub>1</sub><em>am</em>) structure at room temperature. shift of...
The concept of high entropy ceramics opens up the possibility to optimise properties relaxor ferroelectrics with Aurivilius phase structures. In this paper, two new multi-element substituted Aurivillius ceramics, (Ca0.25Sr0.25Ba0.25Pb0.25)Bi2Nb2O9 and (Ca0.2Sr0.2Ba0.2Pb0.2Nd0.1Na0.1)Bi2Nb2O9 are prepared. Both single phase, exhibiting orthorhombic symmetry space group A21am at room temperature. frequency dependence temperature dielectric permittivity peak, Tm, shows behaviour for both...
Dielectric materials, with high tunability at microwave frequencies, are key components in the design of communication systems. Dense Ba0.6Sr0.4TiO3 (BST) ceramics, different grain sizes, were prepared order to optimise dielectric via polar nano cluster effects. permittivity and loss measurements performed both low frequencies supported by results from X-ray powder diffraction, scanning transmission electron microscopies, Raman spectroscopy piezoresponse force microscopy. The concentration...
Grain size can have significant effects on the properties of electroceramics for dielectric, piezoelectric, and ferroelectric applications. Here, we systematically investigate effect grain structure Mn-modified 0.67BiFeO3-0.33BaTiO3 ceramics, an important lead-free piezoelectric ceramic that exhibits both a high coefficient Curie point. Ceramics with average sizes ranging from 0.46 to 6.85 μm were prepared using conventional spark plasma sintering. It was found morphotropic phase boundary...
The fractional cover of vegetation (PV) and exposed bedrock are key ecological indicators the extent degree land degradation in karst regions. In this study, we suggested compared new methodology for direct objective estimation rocky desertification with hyperspectral multispectral imagery. results showed that Hyperion estimated covers PV had good correlation field surveyed R2 (coefficient determination) RMSE (root mean square error) was 0.91 0.05, respectively; while not so good, 0.53 0.11,...
Karst rocky desertification is a process of land associated with human disturbance the fragile karst ecosystems. The fractional cover photosynthetic vegetation (PV) and exposed bedrock (Rock) are main land-surface symptoms desertification. In this study, we explored new methodology for quantifying PV Rock by remote sensing. To reduce effects high heterogeneity landscapes on information extraction, whole image was segmented into relatively homogeneous subsets then estimated using normalized...
Ferroelectric domain walls (DWs) are important nanoscale interfaces between two domains. It is widely accepted that ferroelectric work idly at terahertz (THz) frequencies, consequently discouraging efforts to engineer the create new applications utilize THz radiation. However, present clearly demonstrates activity of frequencies in a lead-free Aurivillius phase ceramic, Ca0.99Rb0.005Ce0.005Bi2Nb2O9, examined using THz-time-domain spectroscopy (THz-TDS). The dynamics different kHz and...
Multiferroics are materials that exhibit two or more primary ferroic properties within the same phase and have potential applications in sensors, spintronics memory devices. Here, dielectric, ferroelectric magnetic of novel multiferroics derived from BaTi1−x(Fe0.5Nb0.5)xO3 (BTFN, 0.01 ≤ x 0.10) ceramics investigated. Multiferroism these is manifested by coexistence long-range ordering antiferromagnetism. With increasing x-value, there a structural evolution tetragonal perovskite to mixture...
Low-temperature printable carbon-electrode perovskite solar cells (C-PSCs) promise commercially scalable and stable low-cost photovoltaic solutions. However, they suffer from low efficiency due to severe performance losses at the carbon interface. Here, we propose a spontaneous interface assembly passivation strategy based on P3HT/NiOx hole-transport bilayer by introducing quaternary ammonium bromide surfactants into NiOx nanoparticles, reveal significant influences their alkyl chains....
Abstract A series of full interpenetrating polymer network (full‐IPN) films poly(acrylic acid) (PAA)/poly (vinyl alcohol) (PVA) were prepared by radical solution polymerization and sequential IPN technology. Attenuated total reflectance‐Fourier transform infrared spectroscopy, swelling properties, mechanical morphology, glass transition temperature the investigated. FTIR spectra analysis showed that new interaction hydrogen bonds between PVA PAA formed. Swelling property in distilled water...
Abstract A superabsorbent of starch, 2‐acrylamido‐2‐methyl‐propanosulfonic acid (AMPS), and sodium acrylate was synthesized by microwave irradiation, the effect AMPS on performance polymer investigated. The best mass fraction three components determined (starch/acrylic acid/AMPS = 2 : 5 3). structure characterized Fourier transform infrared, 13 C cross‐polarization/magic‐angle spinning NMR, scanning electron microscopy, morphology surface sample studied. results showed that changed to some...