A5101767845- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- Ferroelectric and Piezoelectric Materials
- Electromagnetic Launch and Propulsion Technology
- High voltage insulation and dielectric phenomena
- Rocket and propulsion systems research
- Pulsed Power Technology Applications
- Ion-surface interactions and analysis
- Acoustic Wave Resonator Technologies
- Energetic Materials and Combustion
- Integrated Circuits and Semiconductor Failure Analysis
- Induction Heating and Inverter Technology
- Iterative Learning Control Systems
- Electric Motor Design and Analysis
- Diamond and Carbon-based Materials Research
- Silicon Carbide Semiconductor Technologies
- Advanced DC-DC Converters
- Magnetic Properties and Applications
- Embedded Systems and FPGA Design
- Heat Transfer and Optimization
- Vacuum and Plasma Arcs
Naval University of Engineering
2017-2025
University of Massachusetts Lowell
2004
An innovative strategy of introducing space charge traps to dielectric materials is developed by copolymerization MMA with conjugated VK, which enables superior energy storage performance ( U e = 15.7 J cm −3 @ 750 MV m −1 , η 88%).
Deposition of deep-trap, high-temperature-resistant layers by a chemical vapor deposition (CVD) process enables non-destructive and controllable preparation high-performance high-temperature polymer dielectric films.
Under pulsed discharge conditions, high-power thyristors face challenges such as an excessively high current rise rate (di/dt) and the issue of triggering front expansion, which are difficult to accurately simulate. Traditional modeling approaches often neglect non-uniform distribution expansion process internal within silicon wafer. In this study, we address these limitations by incorporating critical factors into our analysis. Using a two-dimensional device–circuit co-simulation approach,...
The increased conformational barrier endows P(VDC-VC) with superior dielectric energy storage performance.
Reluctance coilgun (RCG) is a special which uses solid ferromagnetic material instead of induction coil as projectile. RCG has shown great advantages and potential in the application antiterrorism weaponry due to its simplicity, reliability, excellent controllability. As compact lightweight pulsed-power supply (PPS), compensated pulsed alternator (Compulsator) will play key role promoting this kind electromagnetic weapon into practical applications. Focused on specific conductive rails...
High energy density and efficiency are crucial factors for polymeric dielectrics to satisfy the emerging demand in high-pulse metallized film capacitors. However, achieving high polar is usually accompanied by a sharp decline discharge at elevated electric fields temperatures. In this work, we investigated dielectric storage properties of chlorinated poly(vinyl chloride) (CPVC) with moderate polarity. Due random distribution chlorine atoms on polymer chain, CPVC displays medium permittivity...
Biaxially oriented polypropylene (BOPP) films are currently an indispensable material for pulse capacitor production. Research on the structure-activity relationship of BOPP is important way to optimize its manufacturing process and achieve high energy density. In this article, influences three key structural characteristic parameters (thickness, crystallinity, tensile strength) electrical properties were investigated by testing analyzing manufactured designed processes. The results show...
Biaxially-oriented polypropylene (BOPP) film is currently an indispensable material for pulse capacitor production. The breakdown field strength and leakage current are the key indicators of metallized film, which affect energy storage density voltage holding performance capacitor. In this paper, BOPP subjected to surface treatment with different fluorination time fluoride concentration. changes in properties, such as chemical bond, element content crystallinity after treatment, studied...
Chemical mechanical polished (CMP) (100) GaSb substrates were processed using gas cluster ion beams (GCIB) to improve surface smoothness, reduce subsurface damage, and produce a thermally desorbable oxide layer for molecular-beam epitaxy (MBE) overgrowth. In this article, we report the growth of GaSb/AlGaSb epilayers on GCIB substrates. The either O2 or CF4/O2 as in dual-energy recipe that included moderate energy (10 keV) etch step followed by low-energy (3 smoothing step, with relatively...
Pulsed power supply connects energy-dissipation devices by coaxial cable. The temperature of cable used for repetitious discharge pulsed can rise highly. This paper focuses on the transient characteristic under condition pulse high current. In consideration time and resource consuming general 3-D simulation software, 1-D thermal network differential equations (TNDEs) are introduced. addition, Arnoldi process is applied to reduce TNDEs' complexity due dense space discretization. For model...
As the core component of pulse power supply, life and reliability capacitor is one most important characteristics. Due to many factors that affect complex state equation, model established based on BP neural network method. Firstly, a test platform for pulsed capacitors was established, tests were performed 5 capacitors; Secondly, using experimental data 1 as training data, after model, remaining 4 predicted. Finally, predicted results are compared with actual results, obtained from...