Materials Literature
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The enthalpies of formation of kaolinite and dickite were determined by high-temperature melt solution calorimetry to be ΔfH°(298.15 K) = −4118 ± 10 and −4127 ±10 kJ/mol, respectively. These data represent the first calorimetric confirmation of the metastability of kaolinite with respect to dickite.
The influence of alkaline aqueous solution treatment of groundnut shell–high density polyethylene composites consist of magnesium hydroxide as flame-retardant additives was investigated. FTT daul cone calorimetry and Perkin-Elmer Diamond differential scanning calorimetry (DSC) were used to characterize flammability an…
Well dispersed Fe 3 O 4 nanoparticles were synthesized at 180°C by sol-vothermal method, using iron (III) acetylacetonate as iron source and poly-vinilpyrrolidone (PVP) as special surfactant. The factors affecting reaction system, such as reaction temperature and time, the amount of iron source and surfactant are disc…
Doxifluridine, a prodrug of 5-fluorouracil (5-FU), was used as the initiator directly in ring-opening polymerization of ε-caprolactone to form hydrophobic doxifluridine-poly(ε-caprolactone) (doxifluridine-PCL) that was further grafted with hydrophilic chitosan to synthsize amphiphilic doxifluridine-PCL-chitosan copoly…
Filling ceramic particles that exhibit high thermal conductivity into a polymer is an effective way to enhance the thermal conductivity of the polymer. Alumina (Al2O3) microballs were chosen as the fillers to confirm whether their super-spherical structure would enlarge the maximum filling content of the filler into t…
Discharge and corrosion performances of magnesium alloy anode sheets with content of Hg 1∼3 wt % were investigated. The results show that adding the element of Hg can promote discharge performance of magnesium alloy sheet in two ways: (i) adding an appropriate amount of Hg could inhibit the microgalvanic corrosion and…
Hydrogenation of carbon materials has been attracting a wide range of interests as an application of hydrogen storage materials in hydrogen-powered automobile as well as a methodology to manipulate the electric properties of carbon materials. Graphene with unique electronic, thermal and mechanical properties has been…
We optimized the fundamental composition and additives in a semiconducting V 2 O 5 –P 2 O 5 –TeO 2 glass system to develop lead-free low-melting glass suitable for low-temperature sealing below 400 °C. Glass with a composition of 55.7V 2 O 5 –19.8P 2 O 5 –23.5TeO 2 (mol %) has a low glass transformation temperature (…
Large-scale beta-MnO2/SiO2 core-shell nanorods were synthesized by hydrolysis process. The product was characterized by XRD, EDS, SEM and TEM. The thickness of the SiO2 shell layer is about 3 nm approximately 5 nm, which can be tuned by changing the amount of tetraethyl orthosilicate (TEOS) and the reaction time. The…
Two calcium–cobalt silicates were synthesized in which cobalt occupies different structural positions. The crystal phases belong to two main structural silicate types. In the Co-åkermanite structure (Ca 2 CoSi 2 O 7 ), cobalt cations take tetrahedral coordination toward oxygen atoms. In the Co-pyroxene structure of Ca…
The objective of this study was to investigate the mechanical properties of a low-shrinkage acrylate liquid crystalline resin matrix (ALCRM), (4-3-(acryloyloxy)-2-hydroxypropoxy) phenyl 4-(3-(acryloyloxy)-2-hydroxypropoxy) benzoate, combined with nano-hydroxyapatite (na-HA). The ALCRM monomer and diluent monomer triet…
Objective: to elucidate the application and biosafety of nanomaterials in sports engineering. Methods: literature and experts interview. Results: nanomaterials have widely been applied in sports engineering, such as sports stadium and gymnasium, sports turf, running track, sports clothing, sports equipment and nutriti…
For pulsed power devices, the surface flashover across their solid insulation becomes a serious problem. Investigators have paid much attention on improving the surface electric withstanding strength of insulator. It is found that surface treatment is very useful to increase the surface flashover voltage. The flashove…
Phase change PVA / PEG composite nanofibers were prepared by electrospinning, micro-morphology of PVA / PEG fibers with different weight content were analyzed, the phase change characteristics were also analyzed. The result showed that well distributed composite nanofibers which composed by PVA/PEG blend solution can…
Thermal management in electronic circuits is becoming an important integral part of design considerations. Increasing power densities and speed of advanced computer chips motivate the search for more efficient thermal interface materials. Here we report preliminary results of experimental and theoretical investigation…
This note describes a new reactor design for continuous synthesis of vertically oriented graphene (VG) sheets on cylindrical wire substrates using an atmospheric plasma-enhanced chemical vapor deposition (PECVD) system. Through combining a U-shaped reactor design with "dynamic mode" synthesis featuring simultaneous ro…
Based on the pair potential of interatomic interaction, we study the dependence of various properties of diamond and silicon nanocrystals with a free surface on size, surface shape, and temperature. A model nanocrystal has the form of a parallelepiped faceted by {100} planes with a square base. The number of atoms N i…
Temperature dependences of electrical conductivity σ(T) and permittivity ɛ(T) of one-dimensional (1D) TlGaTe2 single crystals are investigated. At temperatures higher than 305 K, superionic conductivity of the TlGaTe2 is observed and is related to diffusion of Tl+ ions via vacancies in the thallium sublattice between…
Gold nanoparticles are under study as a potentially viable mechanism for hyperthermia tumor treatment in two regimes of the electromagnetic spectrum: laser and radio frequency excitation. Gold nanoparticles, nanorods and nanoshells have been applied with visible laser sources that excite the particles at or near their…
This paper analyzes the effect of changes in the key parameters of an algorithm for identifying cracks in images of rolls of continuous casting machines. The effects of the background threshold of binary conversion and the filter kernel size on the total error of calculations of geometric characteristics of cracks are…