A5102815119- Advanced Thermoelectric Materials and Devices
- Refrigeration and Air Conditioning Technologies
- Chalcogenide Semiconductor Thin Films
- Advanced Thermodynamic Systems and Engines
- Thermal properties of materials
- Heat Transfer and Boiling Studies
- Rocket and propulsion systems research
- Advanced Sensor Technologies Research
- Heat Transfer and Optimization
- Thermal Radiation and Cooling Technologies
- Heat transfer and supercritical fluids
- Wireless Communication Security Techniques
- Advanced Sensor and Control Systems
- Engineering Applied Research
- UAV Applications and Optimization
- Spacecraft and Cryogenic Technologies
- Fire dynamics and safety research
- Environmental and Agricultural Sciences
- Scientific Measurement and Uncertainty Evaluation
- Satellite Communication Systems
- Energy and Environmental Systems
- Anodic Oxide Films and Nanostructures
- Graphene research and applications
- Polydiacetylene-based materials and applications
- Analytical Chemistry and Sensors
National University of Defense Technology
2021-2024
Center for High Pressure Science and Technology Advanced Research
2021-2022
Beijing Institute of Petrochemical Technology
2020
Dalian Maritime University
2019
Wuhan University of Technology
2005-2017
Shanghai Architectural Design & Research Institute
2010-2011
Nanhua University
2007
The existing methods of synthesis thermoelectric (TE) materials remain constrained to multi-step processes that are time and energy intensive. Here we demonstrate essentially all compound thermoelectrics can be synthesized in a single-phase form at minimal cost on the timescale seconds using combustion process called self-propagating high-temperature synthesis. We illustrate this method Cu2Se summarize key reaction parameters for other materials. propose new empirically based criterion...
High performance Bi<sub>2</sub>Te<sub>3</sub>-based thermoelectric material and modules with a conversion efficiency of 5.2% under temperature gradient 250 K were synthesized by TIFS.
Mechanically robust Bi<sub>2</sub>Te<sub>3</sub>-based materials with excellent thermoelectric performance are synthesized by ultra-fast self-propagating high-temperature synthesis in less than 20 min.
The self-propagating-high-temperature-synthesis (SHS) technique is applied here for the first time to synthesize CoSb3 thermoelectric materials. Mixtures of Co and Sb powders were compacted into pellets which ignited from one end. A single-phase skutterudite material was obtained in a very short period using SHS process maintained by heat released chemical reaction with Sb. Thermodynamic parameters kinetics are investigated. ignition temperature, adiabatic propagation speed combustion wave...
High thermoelectric performance of mechanically robust p‐type Bi 2 Te 3 ‐based materials prepared by melt spinning (MS) combined with plasma‐activated sintering (PAS) method can be obtained small, laboratory grown samples. However, large‐size samples are required for commercial applications. Here, ingots 30, 40, and 60 mm in diameter produced MS‐PAS, the influence temperature distribution during process on composition properties is systematically studied first time. Room‐temperature scanning...
High performance Ge doped HMS compounds are synthesized by thermal explosion—a new method which paves the way for mass production of and their large-scale industrial applications.
A series of Sb-doped Mg2Si1–xSbx compounds with the Sb content x within 0 ≤ 0.025 were prepared by self-propagating high-temperature synthesis (SHS) combined plasma activated sintering (PAS) method in less than 20 min. Thermodynamic parameters SHS process, such as adiabatic temperature, ignition combustion and propagation speed wave, determined for first time. Nanoprecipitates observed samples doped Sb. Thermoelectric properties characterized temperature range 300–875 K. With increasing Sb,...
One-step plasma-activated sintering (OS-PAS) fabrication of single-phase high-performance CoSb3-based skutterudite thermoelectric material with a hierarchical structure on time scale few minutes is first reported here. The formation mechanism the CoSb3 phase and effects current pressure fields transformation microstructure evolution are studied in one-step PAS process. application panoscopic approach to this system its effect transport properties investigated. results show that forms during...
A supersaturated solid solution of In<sub>x</sub>Sn<sub>1−x</sub>Te is synthesized by ultra-fast non-equilibrium SHS and phase segregation observed, which offers a new approach to optimize the thermoelectric properties.
The structural and mechanical properties of low-dimensional nanostructured metals have been attracting tremendous interest in the fast-growing fields nanosciences nanotechnologies. However, it still remains a challenge today to develop strong yet ductile that can support further development nanodevices. Here, through polymer-assisted assembly gold nanocrystals, we successfully fabricated freestanding, ultrathin nanomaterial. Unlike conventional bulk or other nanostructures (i.e., nanowires...
It is a challenging task to investigate the regenerative cooling of variable thrust LOX/LCH4 expander cycle rocket engine. The decreasing methane mass flow rate leads two-phase instability in channels (RCC) for low engine thrust. In this study, geometric dimension RCC with phase-change developed. Heat transfer cases are studied based on experimental correlation, which investigated heat characteristics subcritical RCC. Furthermore, effect RCC's analyzed particularly results demonstrate that...
A quasi-two-dimensional calculation method has been proposed to design a plate-fin-typed precooler with high efficiency and low resistance. This considers the variation of fluid properties during heat transfer process, particularly for cryogenics phase change. The characteristics are comprehensively investigated based on models. results demonstrate that effectively explores distribution, such as temperature distribution steam quality inside precooler. Besides, hot drop exceeds 1200 K, while...
Abstract In this paper, the problem of mission planning and spectrum resource allocation for cooperative reconnaissance ground targets with multiple unmanned aerial vehicles (UAVs) is studied. A joint optimization algorithm multi‐UAVs proposed to improve information transmission rate by reusing existing users. The formulated as mixed‐integer non‐linear programming. block coordinate descent (BCD) method further applied achieve optimal strategies planning, channel allocation, power control....
Three-dimensional FEM simulations of fluid-thermal analysis the fluid fields including front-box and 3C-style nozzle aluminum roll-casting was performed by using FLOTRAN module ANSYS. The advanced result based on post-processing ANSYS conducted MATLAB. According to allowable inhomogeneity its application velocity temperature at outlet, most possible broken regions sheets outlet could be predicted in case speed increasing drawing-sheet thickness reducing aluminium sheet during roll casting.
This paper investigates security aspect in cell-free massive MIMO communication network, where numerous access points (APs) equipped with multi-antenna are employed to serve multi unmanned aerial vehicles (UAVs). Considering the pilot contamination, active attack and user-centric (UC) association rule, minimum mean square error (MMSE) approach distributed conjugate beamforming performed for uplink channel estimation downlink data transmission. Significantly, closed-form lower bound on...
This article presented simulation and control of a liquid oxygen/liquid methane variable thrust rocket engine pressurized by the electric pump in throttling process. To get proper injection pressure drop, variation area was investigated determined. In scheme, combustion mixture ratio were targets. simplify correlated to oxygen mass flow rate rate, respectively. By controlling propellant target reached. addition, influence measurement points on effect analyzed. The results showed that...