Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 46 for “"oxide particles"”.
-
Stabilization of Submicron Metal Oxide Particles in Aqueous Media
… poly(2-ethyl-2-oxazoline), PEOX, poly(ethylene oxide), PEO, poly(vinyl alcohol), PVOH, and poly(ethylene imine), PEI, which was modified such that a 1,3-butanediol substituent replaced its imine hydrogens, on SiO₂, TiO₂, and Al₂O₃. PEOX and PEO, relatively basic polymers compared to PVOH were …
-
Synthesis of Nanometer-sized Yttrium Oxide Particles in Diisooctyl Sodium Sulphosuccinate/Isooctane Reverse Micelle Solution
This thesis describes the synthesis of yttrium oxide nanoparticles in an AOT/isooctane reverse micelle solution. Two synthetic methods are compared. First is the precipitation reaction between yttrium nitrate and ammonia, second is the hydrolysis of yttrium isopropoxide. The effects of annealing of …
-
Emission of Insoluble Mineral Particles from Ultrasonic Humidifiers
… paper focused on the behavior of insoluble iron oxides particles, and aluminum oxide particles in ultrasonic humidifiers. 10 mg/L Fe oxide particles and 5 mg/L Al oxide suspension solutions were added into tap water, as fill water for ultrasonic humidifiers operated for 14 hours. Denser, heavier …
-
Enhanced heterogeneous nucleation on oxides in Al alloys by intensive melt shearing
… heterogeneous nucleation on the dispersed oxide particles. It has been established that the naturally occurring oxides in molten Al alloys normally have a good crystallographic match with the a-Al phase, indicating the high potency of oxide particles as the nucleation sites of the a-Al …
-
Solution combustion catalysts for the water-gas shift reaction
… for the preparation of highly-dispersed Pt oxide particles on low surface area CeO2 with a reproducible metal loading and a defined Pt particle size. The aim of this study was to investigate the “conventional” impregnation approach of supports prepared via SCS versus the one-shot SCS …
-
Understanding Formation and Transport of Amorphous Iron Oxyhydroxides in Porous Media using Microfluidic Flow Cells- a Novel Method to Study Freshwater Iron Cycling
… for natural porous media. Using preformed iron oxide particles, a particle deposition rate of 415 min<sup>-1</sup> and a single collector efficiency of 0.081 were obtained after PDMS “beads” had reached steady state coating. Iron oxide coating thicknesses on the PDMS beads were greatest at the …
-
Implications of the Use of Cerium Oxide Nanoparticle Diesel Fuel-Borne Catalysts: From Transformation During Combustion Through Exposure to Plants and Soils
The fate of nanoparticulate cerium oxide from the diesel fuel catalyst Envirox was studied from its presence in the additive to its transformations during combustion through its exposure to plants and soils using a broad range of analytical techniques. Envirox is a fuel-borne catalyst comprised of …
-
The environmental effect on corrosion fatigue behavior of austenitic stainless steels
… features with facets ("river pattern") and few oxide particles. Crack retardation was observed in high sulfur content heat specimens, and the CGR decreases as the loading rise time increases. The fracture surfaces of high sulfur content heat specimens showed distinct features at different rise …
-
Detection and Quantification of Cells using Magnetic Particle Imaging and Magnetic Microspheres
… that specifically detects superparamagnetic iron oxide nanoparticles (SPIOs). Our lab has shown that cell tracking with magnetic resonance imaging (MRI) has very high sensitivity, but low specificity and quantification of iron labeled cells is difficult. MPI cell tracking could overcome these …
-
Tailoring the (bio)activity of polymeric and metal oxide nano- and microparticles in biotic and abiotic environments
Polymeric and metal oxide micro- and nanoparticles are being increasingly introduced into biomedical applications such as tissue engineering as well as in consumer products, which has boosted extensive research towards developing predictive paradigms of their (bio-)activity. The core hypotheses …
-
The plastic deformation of alloys based on aluminum titanide
… thermal stability of a dispersion of rare-earth oxide particles in Ti and Ti$\sb3$Al matrices has been considered analytically and determined experimentally. The solubility product for the formation of erbia (Er$\sb2$O$\sb{3)}$ in a Ti matrix has been calculated using known thermodynamic data …
-
Synthesis, Characterization, and Evaluation of Silica-Nanosphere-Based Contrast Agents for Biomedical Application
… were developed using superparamagnetic iron oxide particles. The agglomeration problems of iron oxide nanoparticles were resolved with an ultrasonication process and then ultimately settled by encapsulating within a silica shell. The surface of silica shells were further modified with --NH2 …
-
Storage and transport of energy in nanostructures
… of particle size on energy storage and Carbon dioxide absorption capability of Calcium oxide particles. We theoretically establish in this work that the CaO nanoparticles achieve higher and faster reaction conversions than the micrometer sized particles. We identify the parameters which …
-
Experimental characterization and chemical kinetics study of chemical looping combustion
… tested fluidized-bed reactor that employs metal oxides coated on particle shaped support materials as the reaction median. In the new reactor, the active metal oxidizes are coated on the surfaces of channel shaped structural material in the new reactor. Due to the different reaction mechanism, an …
-
Processing of Aluminum Alloys Containing Displacement Reaction Products
Aluminum and metal-oxide powders were mixed using mechanical alloying. Exothermic displacement reactions could be initiated in the powders either by mechanical alloying alone or by heat treating the mechanically alloyed powders. Exponential relationships developed between the initiation time of the …
-
In Situe Synthesis of Iron Oxide within Polyvinylamine nanoparticles
Magnetic nanoparticles that display high saturation magnetization and high magnetic susceptibility with a size less than 200 nm are of great interest for medical applications. Investigations of magnetic nanoparticles have been increasing over the last decade. Magnetite nanoparticles are …
-
Lattice Vibration Study Of Silica Nanoparticle In Suspension
… suspensions of nanometer size metallic or oxide particles in a base fluid such as water, ethylene glycol. Nanofluids show enhanced heat transfer characteristics compared to the base fluid. The thermal transport properties of nanofluids depend on various parameters e.g. interfacial …
-
Self-assembly of ferromagnetic micro/nano-particles with perpendicular magnetic anisotropy
Magnetic particles offer an interesting platform for self-assembly, as their dipolar interactions and response to magnetic fields can be used to drive and manipulate assembly. Many magnetic particles used so far in these applications are quite simple in their properties, such as iron oxide …
-
Heat Transfer and Combustion Characteristics of Nano-Sized Aluminum and Aluminum Oxide Utilizing Advanced Laser and Optical Diagnostics
… of nano-sized aluminum and alumina (aluminum oxide) particles. The study employs a two-prong approach, conducting two distinct experiments utilizing nano-aluminum and nano-alumina. Alumina forms an oxide coating on aluminum, requiring an understanding of the associated heat transfer …
Page 1 of 3