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Showing 1 to 16 of 16 for “"tantalum oxide"”.
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Sol-gel derived tantalum oxide thin films
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1987.
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Synthesis, characterization, and photocatalytic activity of tantalum oxide thin films
An increasing demand for a low cost alternative for water disinfection and the recent push for green energy has caused an explosion of research in photocatalysis. While TiO2 is considered to be the standard for photocatalysis, there are a number of issues that need to be overcome to push …
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Macroporous Semiconductors Tantalum Oxide, (Oxy)nitride and Nitride for Photocatalytic Hydrogen Evolution
Due to the serious climatic consequences of CO2 pollution and increasing global energy demand, a clean and sustainable energy source is required. Perhaps the ideal clean fuel is hydrogen, which would be sustainable if it could be sourced efficiently from water. Photocatalysis using …
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Macroporous Semiconductors Tantalum Oxide, (Oxy)nitride and Nitride for Photocatalytic Hydrogen Evolution
Due to the serious climatic consequences of CO2 pollution and increasing global energy demand, a clean and sustainable energy source is required. Perhaps the ideal clean fuel is hydrogen, which would be sustainable if it could be sourced efficiently from water. Photocatalysis using …
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Effects of Magnesium Reduction on the Structure and Electrical Properties of Tantalum Oxide Aerogels
… and commercialization of this technology. Tantalum pentoxide (Ta2O5) is stable under the oxidative potentials and acidic conditions of the ORR, but prior efforts have largely focused on carbon-Ta2O5-Pt catalysts which can still result in the degradation of the support. To develop a …
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Corrosion resistant chemical vapor deposited coatings for SiC and Si3N4
… in the engine's fuel and air intake. Several oxide materials were identified which may be able to protect these components from corrosion and preserve their structural properties. Ta20, coatings were identified as one of the most promising candidates. Thermochemical calculations showed that …
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Hot corrosion behaviour of new candidates for thermal barrier coatings application in turbine simulated environments
… examine the effect of stabilizing zirconia with tantalum oxide, different compositions of ZrO2-Ta2O5 samples in the presence of molten mixture of Na2SO4 + V2O5 at 1100˚C were tested. Hot corrosion results show that orthorhombic zirconium-tantalum oxide is more stable, both thermally and …
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Corrosion studies on alpha tantalum and beta tantalum coated steel
Tantalum coating by sputtering, one form of physical vapor deposition (PVD), has been investigated as a replacement for chromium coatings on gun bores to protect them from erosion and corrosion due to its high ductility and high corrosion resistance in aggressive environments. When deposited as a …
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Physical and electrical properties of Li1+xTi2-xAlx(PO4)3 and Li1+2xTa1-xAlx+1(PO4)3 electrolytes
… (x = 0.0, 0.2, 0.6, 1.0) and lithium tantalum aluminium phosphate (LTaAP), Li1+2xTa1-xAlx+1(PO4)3 (0 ~ 0.5) solid electrolyte were synthesized via solid state reaction techniques at various sintering temperature ranging from 700 to 1000 °C for 8 and 12 h respectively. Lithium carbonate …
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Physical and electrical properties of Li1+xTi2-xAlx(PO4)3 and Li1+2xTa1-xAlx+1(PO4)3 electrolytes
… (x = 0.0, 0.2, 0.6, 1.0) and lithium tantalum aluminium phosphate (LTaAP), Li1+2xTa1-xAlx+1(PO4)3 (0 ~ 0.5) solid electrolyte were synthesized via solid state reaction techniques at various sintering temperature ranging from 700 to 1000 °C for 8 and 12 h respectively. Lithium carbonate …
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Revestimentos a base de Ta/Al2O3 produzidos por aspersão térmica sobre substrato metálico
… starting materials were used for deposition of tantalum oxide powder and aluminium. These two materials were mixed and ground into high-energy mill, then immersed in the torch for the production of alumina coating infused with particles of tantalum with nano and micrometric size. The spraying …
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Synthesis and characterization of cationic contrast agents & imaging of articular cartilage using X-ray computed tomography and magnetic resonance
… (AC): CA4+, an iodinated small molecule, and tantalum oxide nanoparticles (Ta2O5 NPs) for x-ray Computed Tomography (CT) imaging; and Gadopentetate-dilysine (Gd(DTPA)Lys2), a gadolinium small molecule for Magnetic Resonance (MR) imaging. These cationic contrast agents are attracted to the …
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Use of sol-gels in the application of ceramic oxide thin films
<p>Metal oxide sol-gels were produced through a controlled hydrolysis-condensation reaction of the metal alkoxide in alcohol using nitric acid as a catalyst. In obtaining sols of niobia, tantala, and titania, increasing either the water content or the system concentration increased the rate of …
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An In-Vitro Comparison of Microleakage With E. faecalis In Teeth With Root-End Fillings of Proroot MTA and Brasseler's EndoSequence Root Repair Putty
… and biological properties as mineral trioxide aggregate (MTA), but with superior handling characteristics. The material is composed of calcium silicates, monobasic calcium phosphate, zirconium oxide, tantalum oxide, proprietary fillers, and thickening agents. ERRM is said by the …
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Reliability and processing of ferroelectric thin film capacitors with emphasis on fatigue and etching
… replacing the metal electrodes with conducting oxide electrodes such as RuO₂. The oxide electrode/PZT capacitors were characterized for their diffusion barrier properties, perovskite phase formation, interface nature and ferroelectric properties. The results indicate that these oxide electroded …