A5080817568- Advanced ceramic materials synthesis
- Catalytic Processes in Materials Science
- Advancements in Solid Oxide Fuel Cells
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Nuclear Materials and Properties
- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Magnetic and transport properties of perovskites and related materials
- Nuclear reactor physics and engineering
- Fuel Cells and Related Materials
- Mesoporous Materials and Catalysis
- Transition Metal Oxide Nanomaterials
- Nuclear materials and radiation effects
- Innovative Microfluidic and Catalytic Techniques Innovation
- Glass properties and applications
- Electronic and Structural Properties of Oxides
- Aerogels and thermal insulation
- Advanced battery technologies research
- Thermal Expansion and Ionic Conductivity
- Microfluidic and Capillary Electrophoresis Applications
- Gas Sensing Nanomaterials and Sensors
- MXene and MAX Phase Materials
- Advanced materials and composites
- Radioactive element chemistry and processing
Tsinghua University
2015-2024
State Key Laboratory of New Ceramics and Fine Processing
2015-2024
Key Laboratory of Nuclear Radiation and Nuclear Energy Technology
2015-2020
Tohoku University Hospital
2012
Sheffield Hallam University
2002-2006
University of Oxford
2000
Raman spectroscopy has been used to follow the hydration of one principal components Ordinary Portland Cement (OPC) clinkers, tricalcium aluminate, both in absence and presence calcium sulfate. Direct in-situ analysis hydrating paste surface was possible. Spectra were recorded regularly during first 24 hours hydration, then systematically after periods up 28 days. X-Ray diffraction performed confirm sample identity, firstly coordination with analysis. Hydration sulfate rapid led initial...
Sintering temperature effects on the energy-storage properties in barium strontium titanate glass–ceramics have been studied by polarization hysteresis measurements. In phase development and microstructure evolution tests, it was found that with increase of sintering temperature, crystallinity degree primary ferroelectric increases. Dielectric measurements revealed a rapid over range from 800° to 830°C. This effect is believed be due emergence phase. The variation dielectric constant...
A series of BaTiO 3 (BT)‐based ferroelectric glass–ceramics have been prepared via controlled crystallization by varying the Ba/Ti ratio in an aluminum silicate glass composition, and subsequent microstructure, phase evolution, dielectric properties investigated. X‐ray diffraction indicated that increasing promoted BaAl 2 Si O 8 from matrix, cracking appears to be correlated mismatch thermal expansion coefficient among , matrix. In addition, it was found facilitated formation a dendrite...
The ageing of oil-well cement, Dyckerhoff class G, under saturated water vapour in the presence carbon dioxide has been studied using complementary techniques Raman microscopy and environmental scanning electron microscopy. This combination enabled key components involved surface hydration processes to be identified situ, their time evolution monitored directly (without need for quenching sample extraction) this chemistry/mineralogy related local structural changes. It also chemical changes...
The microstructures and dielectric properties of barium strontium titanate glass–ceramics are closely related to the AlF 3 MnO 2 additions. grain morphology was changed by adding , while loss decreased significantly . At same time breakdown strength (BDS) improved doping 4 mol% 1 with glass–ceramics. present investigation resulted in development glass–ceramic compositions high BDS low for energy density capacitor applications.
Nanofibers exist ubiquitously in natural extracellular matrix (ECM) of all kinds human tissues forming hydrated interwoven network. Electrospinning nanotechnology has been proven to be a powerful technique fabricate controllable nanofibers mimicking the ECM structures. Hyaluronic acid (HA), as critical component ECM, widely used tissue engineering and regenerative medicine. In this study, pure HA with average diameter 33 +/- 5 nm, 59 12 79 nm 113 19 were successfully prepared using different...
ZrO 2 microspheres were prepared with an improved internal gelation process without cooling the precursor solution. The stability of broth for has been systematically investigated, and results show that preparation storage temperature, concentration NO 3 − urea in have important effects on broth. Through optimizing formulation can be stable 14 h at 25°C. ceramic uniform size good sphericity, a density 5.87 g/cm .
Abstract Zirconium compounds has been widely attention over the last decades due to its excellent physical and chemical properties. nitride nanopowders were synthesized via a simple direct carbothermic nitridation process of internal gel derived zirconia in presence nano-sized carbon black. The effects reaction temperature, dwell time molar ratio black Zr (C/Zr) on phase composition, grain size crystal parameters products studied. Based upon analysis crystallite evolution microstructure...
Hybrid materials have been prepared through the sol–gel route from poly(tetraethylene glycol malonate) (PTEGM) and titanium isopropoxide (TIP) in acidic media. The bulk gels were characterised by thermal analysis (TG, DSC TMA), wide-angle X-ray scattering (WAXS), transmission electron microscopy (TEM) FTIR. results indicate that gel incorporates –Ti–O–Ti– crosslinks appended to dicarbonyl functions of malonate units. deformation temperature increases fromca.–50 °C ca. 200 for...
ZrO 2 –ZrC (ZrCO) ceramic microspheres were fabricated by combination of internal gelation and carbothermal reduction process. The broth containing carbon powders was prepared stored at room temperature 25°C to form a precursor microspheres. By dropping droplets the into hot silicone, gel would solidify within few seconds decomposition hexamethylenetetramine ( HMTA ). dispersability in is key factor producing ZrCO with uniform density distribution, as zirconium carbides are generated direct...