نتایج جستجو برای: differential thermal analysis dta
تعداد نتایج: 3216137 فیلتر نتایج به سال:
Abstract In this study, the eutectic temperature and latent heat of Al–Si- Zn–Al–Mg-based alloys were determined using differential thermal analysis (DTA) scanning calorimetry measurements in order to identify for storage ranges 450–550 300–350°C. First, compositions Al–Si–Cu–Mg–Zn Zn–Al–Mg–Sn identified electron microscopy with energy-dispersive X-ray spectroscopy DTA two steps. second step, m...
In this study, fabrication of an in-situ composite through aluminothermic combustion synthesis in An Al–V2O5-NiO system was investigated. Therefore, Al, V2O5 and NiO powders with stoichiometric ratio of 11:1:1, respectively, were milled for an hour and finally the mixtures were compressed. In order to investigate the temperatures of phase transformations, Differential Thermal A...
in the current study, synthesis and characterization of a new nano-structured zirconium(iv)-minoxidil complex (1), where minoxidil, (c9h15n5o; 6-(1-piperidinyl)-2,4-pyrimidinediamine 3-oxide), have been investigated in two different solvents. the compound 1 has been synthesized by sonochemical method in the presence of methanol and monoethylene glycol (meg) as solvents and characterized by scan...
In this research, the thermal stability and decomposition kinetics of pentaerythritol tetranitrate (PETN) and Pentastite explosives have been studied experimentally using non-isothermal differential thermal analysis (DTA) and thermo-gravimetric (TG) methods at heating rates of 4.0, 6.0, 8.0 and 10.0 °C/min. The kinetic parameter of activation energy (Ea) and critical ignition temperature fo...
Surgical extent-of-resection has been shown to have an impact on high-grade glioma (HGG) outcomes; however, complete resection is rarely achievable in difficult-to-access (DTA) tumors. Controlled thermal damage to the tumor may have the same impact in DTA-HGGs. We report our multicenter results of laser interstitial thermal therapy (LITT) in DTA-HGGs. We retrospectively reviewed 34 consecutive ...
TheZrO2-based materials are practically important as the thermal barrier coatings(TBC) for high temperature gas turbines, due to their low thermal conductivity, hightemperature thermal stability and excellent interfacial compatibility. Studies of the phaseequilibira, phase transformation, and thermodynamics of the ZrO2-based systems can providethe necessary basic knowledge t...
Schiff bases derived by condensation reaction from cinnamaldehyde and/or -bromocinnamaldehyde and 4-(4-aminophenylsulfonyl)benzenamine are reported and characterized based on elemental analyses, IR, H NMR, C NMR and thermal analysis (TG/DTA). 1 13
BACKGROUND It is presently well accepted that the breast exhibits a circadian rhythm reflective of its physiology. There is increasing evidence that rhythms associated with malignant cells proliferation are largely non-circadian. Cancer development appears to generate its own thermal signatures and the complexity of these signatures may be a reflection of its degree of development. The limitati...
Glass-ceramic materials, obtained by sinter-crystallization of melted alkaline-olivine basaltic tuffs, were investigated. The kinetics of bulk crystallization was evaluated by differential thermal analysis (DTA) at different heating rates. The phase formation and the sintering behavior of glass powders (<75 lm) were studied in air and in nitrogen atmospheres by DTA and dilatometry, respectively...
Novel biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate) [PHBV]/graphene nanocomposites were prepared by solution casting. The thermal properties, crystallization behavior, microstructure, and fracture morphology of the composites were investigated. Scanning electron microscope (SEM) results show that graphene layers are homogeneously dispersed in the polymer matrix. X-ray diffraction (...
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