A5040647324- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- MXene and MAX Phase Materials
- Boron and Carbon Nanomaterials Research
- 2D Materials and Applications
- Metallic Glasses and Amorphous Alloys
- High-pressure geophysics and materials
- High Entropy Alloys Studies
- Ga2O3 and related materials
- Copper Interconnects and Reliability
- Semiconductor materials and devices
- Intermetallics and Advanced Alloy Properties
- Shape Memory Alloy Transformations
- Advanced materials and composites
- Phase-change materials and chalcogenides
- Metal and Thin Film Mechanics
- Ferroelectric and Piezoelectric Materials
- GaN-based semiconductor devices and materials
- Thermal Expansion and Ionic Conductivity
- Topological Materials and Phenomena
- Diamond and Carbon-based Materials Research
- High-Temperature Coating Behaviors
- Graphene research and applications
- Advanced Photocatalysis Techniques
Center for High Pressure Science and Technology Advanced Research
2020-2024
Inner Mongolia University
2021-2022
Abstract To meet the needs of energy storage under high temperature and pressure, a high‐entropy relaxor ferroelectric ceramic, La‐modified (Bi 0.2 Na Ba Sr Ca )TiO 3 is prepared, which has excellent thermal mechanical stability. At wide range 327–689 K (tan δ < 0.01) below ≈7 GPa, material shows extraordinary functional performance. Comprehensive study indicates that ceramic possesses single‐phase cubic perovskite structure, as pressure increases, undergoes transition at ≈8 in enormous...
Thinning the buffer layer thickness between GaN epilayer and Si substrate without introducing large residual stress is persistently desired for GaN-on-Si devices to promote their thermal budgets low-cost, multifunctional applications. In this work, heterostructures were directly bonded at room temperature by surface activated bonding (SAB) therein states investigated confocal micro-Raman. The effects of annealing process on interfacial microstructure in SAB fabricated also systematically...
In this work, the starting nominal Ti25Zr25Hf25Nb25 high entropy alloy (HEA) has two body centered cubic (BCC) phases with a volume percentage about 100:1, primary phase having much larger bulk modulus (incompressible) than uniform single-phase HEA. We found that these merged into one single BCC at pressures beyond 36 GPa, whose dropped to of normal homogeneous After decompressing, new can be sustained ambient conditions. This abnormal pressure-induced softening was largely related lattice...
It is of paramount importance to explore novel 2D materials with unique structural and physical properties that are promising for application in a specific field. Herein, eleven monolayers square lattice studied, including S ‐SeN 2 , ‐TeN ‐SP ‐SeP ‐TeP ‐SAs ‐SeAs ‐TeAs ‐SSb ‐SeSb ‐TeSb via first‐principles calculations. Through stability screening, only the monolayer, where each Se atom tetracoordinated four N atoms, bridges two thus forming tri‐sublayer structure lattice, verified as stable...
Spatial heterogeneity, as a crucial structural feature, has been intensively studied in metallic glasses (MGs) using various techniques, including two-dimensional nanoindentation mapping. However, the limiting spatial resolution of mapping on MGs remains unexplored. In this study, comprehensive study four representative with Berkovich indenter was carried out by considering influence normalized indentation spacing d/h (indentation spacing/maximum depth). It appeared to have no significant...
MnBi2Te4 can generate a variety of exotic topological quantum states, which are closely related to its special structure. We conduct comprehensive multiple-cycle high-pressure research on by using diamond anvil cell study phase transition behaviors under high pressure. As observed, when the pressure does not exceed 15 GPa, material undergoes an irreversible metal–semiconductor–metal transition, whereas exceeds 17 layered structure is damaged and becomes irreversibly amorphous due lattice...
Free volume is one of the most important structural features closely associated with various glass phenomena and properties. However, precise determination how free evolves external tuning poses a considerable challenge. In this work, by using in situ high-pressure synchrotron x-ray diffraction diamond anvil cell, we investigate effect pressure on relatively soft $\mathrm{L}{\mathrm{a}}_{75}\mathrm{A}{\mathrm{l}}_{25}$ metallic (MG). Our investigation quantitatively compares...
Diamond is known as the hardest substance due to its ultra-strong tetrahedral sp3 carbon bonding framework. The only weak link cubic cleavage planes between (111) buckled honeycomb layers. Compressing graphite single crystals and heating moderate temperatures, we synthesized a bulk, pure, hexagonal diamond (lonsdaleite) with distorted tetrahedrons that shorten bond (001) layers, thus strengthening their linkage. We observed direct transformation of (100) lonsdaleite (002) (100). find bulk...
Recently, solid-state amorphization through temperature-induced martensitic transition has been reported. The stability of the amorphous martensite phase, which co-exists with a crystalline counterpart, is intriguing but remains unclear. In this work, we studied structural Ti59.1Zr37Cu2.3Fe1.6 alloy by combining in situ high-pressure synchrotron x-ray diffraction ex transmission electron microscopy. During compression at room temperature, an irreversible pressure-induced crystallization...
Two-dimensional hexagonal boron nitride ( h -BN) is an insulator with polar covalent B−N bonds. Based on current research boron-nitrogen 2D materials and the cluster assembling method, here, we designed five novel monolayers square lattice formed by tetrahedral B 4 units covalently linked to V-group atoms, namely N 2 , P As Sb Bi monolayers, via first-principles calculations. Both have good stability as demonstrated high cohesive energies, all positive phonon modes, in-plane Young's modulus...