A5008857362- Hydrocarbon exploration and reservoir analysis
- Ferroelectric and Piezoelectric Materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Paleontology and Stratigraphy of Fossils
- Dielectric materials and actuators
- Geological and Geochemical Analysis
- Microwave Dielectric Ceramics Synthesis
- Synthesis and characterization of novel inorganic/organometallic compounds
- Perovskite Materials and Applications
- Crystallography and molecular interactions
- Multiferroics and related materials
- Methane Hydrates and Related Phenomena
- Electronic and Structural Properties of Oxides
- Semiconductor materials and devices
- Supercapacitor Materials and Fabrication
- Advanced Sensor and Energy Harvesting Materials
- Inorganic Chemistry and Materials
- Geochemistry and Elemental Analysis
- Organometallic Complex Synthesis and Catalysis
- Dielectric properties of ceramics
- Graphene research and applications
- Magnetic and transport properties of perovskites and related materials
University of Minnesota
2011-2025
Research Institute of Petroleum Exploration and Development
2014-2024
China Agricultural University
2022-2024
Guangzhou Academy of Special Equipment Inspection and Testing
2024
Jiangnan University
2024
Xinjiang University
2024
Collaborative Innovation Center of Quantum Matter
2023
Peking University
2023
PetroChina Southwest Oil and Gas Field Company (China)
2012-2022
Oil and Gas Center
2021-2022
Novel perovskite-type (1 −<italic>x</italic>)BaTiO<sub>3</sub>–<italic>x</italic>BiYbO<sub>3</sub>solid solutions with<italic>x</italic>= 0.00–0.20 were synthesized using conventional solid-state reaction methods.
The designed 0.8BNTSZ–0.2NN ceramic demonstrates superb temperature stability with a capacitance variation <±15 from −55 °C to 545 °C.
A novel lead-free (1 - x)CaTiO3-xBiScO3 linear dielectric ceramic with enhanced energy-storage density was fabricated. With the composition of BiScO3 increasing, constant ceramics first increased and then decreased after x > 0.1, while loss increased. For = polarization into 12.36 μC/cm2, 4.6 times higher than that pure CaTiO3. The energy 0.9CaTiO3-0.1BiScO3 1.55 J/cm3 efficiency 90.4% at breakdown strength 270 kV/cm, power 1.79 MW/cm3. Comparison other confirmed superior potential...
Abstract Piezoelectric materials provide high strain and large driving forces in actuators can transform electrical energy into mechanical energy. Although they were discovered over 100 years ago, scientists are still searching for alternative lead-free piezoelectrics to reduce their environmental impact. Developing high-strain piezoelectric has been a long-term challenge, particularly challenging the design of polycrystalline containing no toxic lead element. In this work, we report one...
Abstract This paper reports the synthesis of tetragonal zirconia nanowires using template method. An as‐prepared sample was characterized by scanning and transmission electron microscopy. It found that materials were with average diameters ca. 80 nm length over 10 μm. The Raman spectrum showed peaks at 120, 461, 629 cm –1 , which are attributed to E g B 1g phonon modes structure, respectively. UV‐vis absorption an peak 232.5 (5.33 eV in photon energy). Photoluminescence (PL) spectra a strong...
Abstract A series of ferroelectric ceramic models with grain and grain‐boundary structures different sizes are established via Voronoi tessellations. phase‐field model is introduced to study the dielectric breakdown strength these ceramics. Afterward, relation between electric displacement field hysteresis loop calculated using a finite element method based on classical modified hyperbolic tangent model. The results indicate that as size decreases, enhanced, but permittivity reduced....
The electronic structure, lattice vibrations, and optical, dielectric thermodynamic properties of BaTiO<sub>3</sub>/CaTiO<sub>3</sub>/SrTiO<sub>3</sub> (BT/CT/ST) ferroelectric superlattices are calculated by using first-principles calculations.
Based on the analysis of basic characteristics medium- and large-sized marine gas fields in Sichuan Basin, combined with division major reservoir forming geological units craton stage their control key hydrocarbon accumulation factors, distribution law carbonate basin was examined exploration direction pointed out. Through periodic stretching-uplifting background, it is concluded that five large scale paleo-rifts, three paleo-uplifts, paleo erosion surfaces were formed these factors medium...
Discovering highly active and stable electrocatalysts for the oxygen evolution reaction (OER) is critical to commercial development of many next-generation energy conversion storage devices, with Fe-doped nickel (oxy)hydroxide representing one most promising OER catalysts developed date. However, sites mechanism on remain unclear. To gain deeper insights into role metal dopants in enhancing activity, we explored here Ir-doping performance catalysts, placing particular emphasis nature site....
Recently, electrolyte gating techniques employing ionic liquids/gels in electric double layer transistors have proven remarkably effective tuning charge carrier density a variety of materials. The ability to control surface densities at levels above 10(14) cm(-2) has led widespread use the study superconductivity, insulator-metal transitions, etc. In many cases, controversy remains over doping mechanism, however (i.e., electrostatic vs electrochemical (e.g., redox-based)), and technique been...
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...
Anisotropy is a manifestation of lowered symmetry in material systems that have profound fundamental and technological implications. For van der Waals magnets, the two-dimensional (2D) nature greatly enhances effect in-plane anisotropy. However, electrical manipulation such anisotropy as well demonstration possible applications remains elusive. In particular, in-situ modulation spin transport, vital for spintronics applications, has yet to be achieved. Here, we realized giant electrically...
Abstract Supported nanoclusters (SNCs) with distinct geometric and electronic structures have garnered significant attention in the field of heterogeneous catalysis. However, their directed synthesis remains a challenge due to limited efficient approaches. This study presents plasma-assisted treatment strategy achieve supported metal oxide from rapid transformation monomeric dispersed oxides. As case study, oligomeric vanadia-dominated surface sites were derived classic V 2 O 5 -WO 3 /TiO...
Two-dimensional monolayer materials, with thicknesses of up to several atoms, can be obtained from almost every layer-structured material. It is believed that the catalogs known 2D materials are complete, fewer new graphene-like being discovered. Here, we report monolayers monoxides such as BeO, MgO, CaO, SrO, BaO, and rock-salt structured monochlorides LiCl, NaCl using first-principle calculations. containing d-orbital atoms HfO, CdO, AgCl predicted. Adopting same strategy, mononitrides...
Abstract Inorganic/organic dielectric nanocomposites have been extensively explored for energy storage applications their ease of processing, flexibility, and low cost. However, achieving simultaneous high density efficiency under practically workable electric fields has a long‐standing challenge. Guided by first‐principles calculations interface properties phase‐field simulations the dynamic breakdown process, superhierarchical ferroelectric perovskites, layered aluminosilicate nanosheets,...