A5007036987- High-pressure geophysics and materials
- ZnO doping and properties
- Ferroelectric and Piezoelectric Materials
- Inorganic Chemistry and Materials
- Diamond and Carbon-based Materials Research
- Thermal Expansion and Ionic Conductivity
- Advancements in Solid Oxide Fuel Cells
- Gas Sensing Nanomaterials and Sensors
- Geological and Geochemical Analysis
- Electronic and Structural Properties of Oxides
- Microwave Dielectric Ceramics Synthesis
- Molten salt chemistry and electrochemical processes
- Earthquake Detection and Analysis
- Nuclear Materials and Properties
- Copper-based nanomaterials and applications
- Thermal properties of materials
- interferon and immune responses
- Ziziphus Jujuba Studies and Applications
- Advanced Condensed Matter Physics
- Transition Metal Oxide Nanomaterials
- Magnetic and transport properties of perovskites and related materials
- Immune Response and Inflammation
- Thin-Film Transistor Technologies
- Inorganic Fluorides and Related Compounds
- Influenza Virus Research Studies
Mudanjiang Normal University
2019-2023
Changchun University of Chinese Medicine
2022
Center for High Pressure Science and Technology Advanced Research
2022
Center for High Pressure Science & Technology Advanced Research
2022
Jilin University
2017-2021
State Key Laboratory of Superhard Materials
2019
The study on the thermal transport properties of matter under high pressure is important but hard to fulfill in a diamond anvil cell (DAC) because accurate measurement temperature gradient within sample DAC very difficult. In most cases, can be read accurately from thermocouples that are directly attached lateral edges anvils both and uniformly heated up given temperature. But for property studies DAC, an artificial distribution along compression axis prerequisite. Obviously, top or bottom...
Abstract The high‐pressure behavior of deep carbonate dictates the state and dynamics oxidized carbon in Earth's mantle, playing a vital role global cycle potentially influencing long‐term climate change. Optical absorption Raman spectroscopic measurements were carried out on two natural samples diamond‐anvil cells up to 60 GPa. Mg‐substitution high‐spin siderite FeCO 3 increases crystal field band position by approximately 1000 cm –1 but such an effect is marginal at >40 GPa when...
The ionic transport properties of solid electrolyte LaF3 were systematically studied under high pressures up to 30.6 GPa with alternate-current impedance spectra measurements and first-principles calculations. From the measurements, was found transform from pure conduction mixed electronic at 15.0 GPa, which results pressure-induced structural phase transition a tysonite-type structure an anti-Cu3Ti-type structure. F- ion migration can be suppressed by pressure, causing decrease conductivity...
In this paper, a new method for in situ thermal conductivity measurements were established diamond anvil cells (DAC) and achieve at high pressure temperature under steady heat flow conditions. method, the traditional flux calibration was replaced by measurement of anvils finite element analysis. Furthermore, DAC set-up with two heating furnaces developed to better serve proposed method. The four different nitrogen content measured compared reference verify method's feasibility as future measurements.
In situ impedance measurement and first-principles calculations have been performed to investigate the effect of high pressure (up 35.5 GPa) on dielectric properties SrMoO4. It is found that carrier transport process dominated by grains, variation in resistance under compression related change activation energy. The relative permittivity tetragonal phase SrMoO4 stable below 7.0 GPa has electrical storage capacity as well. However, electron localization around O atoms monoclinic enhanced with...
The influence of grain sizes, size effects, has long been a key factor influencing the properties and even phase transformation pathways nanomaterials resulted in lot intriguing abnormal phenomena. mechanism behind these peculiar phenomena remains unresolved. In this study, we performed high-pressure electrical spectroscopic measurements on nanoanatase TiO2 with average sizes 11 62 nm, respectively, to characterize relation between effects its thus reveal Our work demonstrated that certain...
Diamond negatively charged nitrogen-vacancy (NV–) centers provide an opportunity for the measurement of Meissner effect on extremely small samples in a diamond anvil cell (DAC) due to their high sensitivity detecting tiny change magnetic field. We report variation field distribution DAC as sample transforms from normal superconducting state by using finite element analysis. The results show that flux density has largest sidewall sample, where NV– can detect strongest signal In addition, we...
We present a novel technique for controlling oxygen fugacity, which is broadly used to in-situ measure the electrical conductivities in minerals and rocks during diamond anvil cell experiments. The of olivine are determined under controlled fugacity conditions (Mo–MoO 2 ) at pressures up 4.0 GPa temperatures 873 K. advantages this new enable measuring activation enthalpy, energy, bulk volume Arrhenius relationship. This provides an improved understanding mechanism conduction olivine....
Scheelite ABO4-type solid electrolytes have attracted much attention for potential applications as oxygen ionic conductors of oxide fuel cells. Herein, a systematic study was carried out on the electrical transport properties CdMoO4 under high pressure by impedance spectroscopy measurements and theoretical calculations. The sequence structural phase transitions at pressures determined I41/a → C2/c P21/c Crystal structure AnaLYsis Particle Swarm Optimization (CALYPSO) method. A...
The fluorite phase of SnO2 is discovered to demonstrate superior electrical conductivity compared its rutile phase. Achieving SnO2's at reduced pressure and intercepting it ambient condition major significance. In this paper, we performed systematic investigations on transformations physical properties under heating nonhydrostatic compression using in situ X-ray diffraction (XRD) measurements. Compared previous XRD experiments (21 GPa, room temperature), that cubic can be achieved retained...