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Showing 1 to 20 of 31 for “"zirconium oxide"”.
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INVESTIGATION OF THE STRUCTURAL PROPERTIES OF HAFNIUM ZIRCONIUM OXIDE THIN FILMS
Hafnium-zirconium oxide (HfxZr1-xO2)-based dielectrics have received an abundance of attention recently, holding promise for use in CMOS-compatible ferroelectric memory technology. Unlike in conventional ferroelectrics, ferroelectricity in HfxZr1-xO2 is retained in ultrathin films of only a few …
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Sulfate and Hydroxide Supported on Zirconium Oxide Catalysts for Biodiesel Production
… research project, heterogeneous catalysts of zirconium oxide were produced by impregnation. Zirconium oxide impregnation with sulfuric acid produced acidic solid catalysts. It was determined that impregnation and calcination at 550<sup>o</sup>C (SO₄/ZrO₂-550<sup>o</sup>C) produced the best …
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Microstructural study of zirconium oxide grown on a zirconium alloy substrate for orthopaedic applications
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1998.
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Predicting the equilibria of point defects in zirconium oxide : a route to understand the corrosion and hydrogen pickup of zirconium alloys
The performance of zirconium alloys in nuclear reactors is compromised by corrosion and hydrogen pickup. The thermodynamics and kinetics of these two processes are governed by the behavior of point defects in the ZrO₂ layer that grows natively on these alloys. In this thesis, we developed a …
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Infrared measurements of surface temperatures during oscillating/fretting contact with ceramics
… shaker. Ceramic materials including zirconium oxide, sapphire, aluminum oxide, and tungsten carbide were used as test specimens since they are inert in air, and generate high surface temperatures when used in the oscillating contact system. Instantaneous fluctuations in surface …
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Visible and Infrared Light Detection Using 2D Materials
… ultrathin materials such as ALD grown Hafnium Zirconium Oxide (Hf₀.₅Zr₀.₅O₂) open up the possibility of designing fast (<1 ms thermal time constant) thermal detectors while still maintaining high specific detectivity. This thesis focuses on developing novel light detectors and harvesters based …
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Electrolyte selection for cobalt-free solid-state batteries
… performance characteristics. Lithium-lanthanum-zirconium oxide is presented as a suitable electrolyte replacement. Coupled with cobalt-free electrodes, this battery design would provide a safer, more responsible battery.
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Investigation Of High-k Gate Dielectrics And Metals For Mosfet Devices.
… high-k dielectric materials like Tantalum pent oxide (Ta2O5), Hafnium oxide (HfO2), Zirconium oxide (ZrO2) and Aluminum oxide (Al2O3) gate oxides. Higher dielectric constant may lead to high oxide capacitance (Cox), which affects the threshold voltage (VT) of the device. The working potential of …
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Vapour phase catalytic oxidation of 2-methylpropene over bismuth molybdate catalysts.
… Bismuth molybdate supported on zirconium oxide, an n-type catalyst was used. The effect of various process variables, namely the feed ratio of oxygen to 2-methylpropene, reaction temperature, and the reciprocal of space velocity on the conversion of olefin and the product …
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Klinische Bewährung von Kronen und Brücken aus einer Lithium-Disilikat-Glaskeramik nach 60-monatiger Beobachtungsdauer
… a good alternative the modern CAD/CAM generated zirconium oxide ceramics can be used. Another problem was a relative high rate of chipping of the veneering ceramic which can be explained by bonding problems between the framework and the veneering material. To avoid that, a very precise …
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The Deposition Characteristics of Zrc On Uo2 Kernels Produced For Advanced Triso Fuels In Gen-Iv Reactors
… of an advanced TRISO particle in which zirconium carbide (ZrC) layer is placed directly on the fuel kernel. The benefit of adding ZrC is that it is a good oxygen getter due to a low Gibb's free energy, forming a stable zirconium oxide and free carbon. This will help minimize typical …
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A comparison of electrical performance analysis between nanoscale double-gate and gate-all-around nanowire mosfet
… candidates to pursue Complementary-Metal-Oxide Semiconductor scaling. When the device is scaled down, several problems arise such as the short-channel effect, excessive transistor gate leakage and power consumption. The purpose of this simulation work is to compare the performance of …
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Fundamental processes in growth of reactive DC magnetron sputtered thin films
… combinations, which is illustrated by two oxide deposition reports on neighbouring elements - hafnium and tantalum, a surprising structural trend is revealed. While films are obtained crystalline at room temperature for group IV oxides, amorphous films were obtained for groups V and VI …
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Ermittlung des Verformungs- und Schädigungsverhaltens von Wärmedämmschichtsystemen
… atmospheric plasma sprayed, yttrium stabilized zirconium oxide; a bond coat (BC) layer of NiCoCrAlY (balance Ni, 21.1%Co, 17.1%Cr, 12.6%Al, 0.61%Y, 0.4%Hf) that also acts as a corrosion protection; and a substrate of the polycrystalline turbine blade alloy IN 792 CC or the single crystalline …
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Process property relations in reactively sputtered transition metal compounds
… are studied. It is shown that reactive HPPMS of zirconium oxide exhibits a stable and hysteresis-free transition zone, as opposed to reactive dcMS. The stabilization of the transition zone in HPPMS facilitates the growth of transparent zirconium oxide films at lower target coverage, in comparison …
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In-Situ-Messungen der mechanischen Spannungen in gesputterten Metall- und Oxidschichten
… the stress evolution in thin sputtered metal and oxide films. To achieve this, a deposition system for reactive direct-current sputtering with integrated in-situ wafer curvature setup has been developed and is presented here. At first, metal films (zinc, zirconium, niobium and titanium) have been …
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Studies of Used Fuel Fluorination and U Extraction Based on Molten Salt Technology for Advanced Molten Salt Fuel Fabrication
… dissolve it into a LiF, sodium fluoride (NaF), zirconium fluoride (ZrF4) salt. Zirconium (Zr) was also reduced and deposited on a tungsten (W) cathode at the same time transporting the Zr through the salt. As commercial zircaloy would be contaminated with UNF oxides, and the oxides will not …
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Exploring the Synthesis of Monolithic Metal-Organic Frameworks and their Composites for Advanced Water Management Solutions
… polymers that are formed when metal ions or oxide clusters crystallise by self-assembling with multi-dentate organic linkers. While these porous materials have achieved remarkable academic success, their practical applications have been limited due to their powdery nature, which hampers …
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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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