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 19 of 19 for “"Titanates"”.
-
Electric and Magnetic Properties of Some Alkaline-Earth Titanates
Made available in DSpace on 2014-12-04T21:02:52Z (GMT). No. of bitstreams: 1 0018122.pdf: 5477814 bytes, checksum: 3846f2350cd93ad042b88e327375a5c5 (MD5) Previous issue date: 1956
-
Part I. Chemical processing of barium titanates. Part II. The chemistry of sulfotitanic acids, molecular analogues of sulfated metal oxide superacids
Made available in DSpace on 2011-05-07T14:04:39Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9702583.pdf: 5005183 bytes, checksum: c1cd26b9c7ea8b20868f9b4a84d3ca52 (MD5) Previous issue date: 1996
-
Aspects of the chemistry of titanium dioxide in fused salt solvents
… crystallize TiO2 and/or complex alkali metal titanates. The preparation and properties of potassium titanates with K2O/TiO2 mol ratio ≤1 has been studied. In addition the thermal decomposition of potassium hexafluorotitanate monohydrate (reported to yield potassium tetratitanate) has been …
-
Beyond Lithium-Ion Technology: Lithium-Sulfur and Potassium-Ion for Better and Cheaper Batteries
… the oxygen deficient loose-layered potassium titanates (LL-KTO) anode delaminates and restacks reversibly upon charging and discharging, to name it, stacked ↔ sliced structural transformation. This mechanism allows for large storage of K+ ions in the electrode with net-zero structural …
-
Synthesis and Characterization of Polymer Composite Materials For Lithium Battery Cathodes and Capacitors
… polystyrene composites containing a variety of titanates, aluminates, and novel mixed metal phosphonates. We investigated BaTiO3 materials, covalently surface-modified BaTiO3, and novel mixed metal phosphonates, ATi(O3PC6H5)3 (A = Ba, Sr) to assess the effect of particle size and surface …
-
Sulfidation of Ternary Oxides: A Thermodynamic and Experimental Study Toward Selective Metal Extraction
… earth and transition metal ternary oxides of titanates, molybdates, tungstates, niobates, and tantalates. Modified predominance diagrams were constructed to determine the possible sulfidation outcomes, and a sensitivity analysis on the input thermodynamic data was performed to assess their …
-
New Ruddlesden-Popper Perovskites Obtained by Topochemical Methods
… perovskite sheets and produces new mixed valence titanates. Lithium intercalation in the vanadyl compounds, Na0.05(VO)0.48GdTiO4 , as well as (VO)La2Ti3O10 gives rise to new magnetic properties. The crystal structures, thermal behavior, electronic and magnetic properties of these new compounds …
-
OXIDATION AND REDUCTION SYNTHESIS OF SURFACE ENHANCED TITANIUM-BASED ELECTRODES FOR ELECTROLYTIC CAPACITORS
… reveal that mostly alkali–earth-metal-titanates were formed during the reduction process. Full reduction to metallic porous titanium is achieved only with calcium as a reductant and with calcium chloride as a catalyst for dissolving CaO reaction barrier. The dielectric properties of …
-
Neutron Compton scattering from hydrogen and perovskite oxide interfaces
… within this model: the orbital physics of the titanates, and the long range coulomb interactions produced by the polar discontinuity at the interface. From this model, we predict a two dimensional layer of charge confined to the interface, which is consistent with experimental observations.
-
Polymer Composite Dielectric Materials For Pulse Power Applications
… integrity of "giant-dielectric" calcium copper titanates (CCTO) fillers in PS and poly (vinylidene fluoride - hexafluropropylene) copolymer (PVDF-HFP) systems will be discussed. An attempt has been made to understand the effect of filler preparation method (sol-gel vs. solid state) and filler …
-
Heteroepitaxial Interfaces Modify Collective States in Complex Oxides
… of collective phenomena in isostructural phases. Titanates and manganites are two examples where various members of their groups have close enough lattice constants that strained superlattices involving both kinds of materials grow epitaxially. In this work aggregate response and interface effects …
-
Use of sol-gels in the application of ceramic oxide thin films
… an AC bridge circuit. In the case of the barium titanates, these calculated constants ranged from a high of 26.0 for TiO[subscript]2, to a low of 11.9 for BaTi[subscript]5O[subscript]11. The range for lithium tantalate was from a high of 21.6 for a stoichiometry of Li[subscript]7TaO[subscript]6, …
-
Titania-based nanocomposites for solar photocatalysis
This thesis explores several titania-based composites for photocatalytic water treatment and hydrogen evolution. For water treatment, TiO$_2$-C core-shell composites were prepared through controlled hydrolysis of titanium alkoxides followed by calcination in a non-oxygenating atmosphere. A total of …
-
Supported Cobalt Oxide Catalysts for the Preferential Oxidation of Carbon Monoxide: An in situ Investigation
… allow for the formation of silicates, titanates and aluminates, respectively. Support materials such as CeO2, ZrO2 and SiC, are not known for interacting strongly with nanoparticles and often do not react to form MSCs. Therefore, the second objective of this Ph.D. study was to …
-
Thermal expansion and phase transformation behavior in the rare-earth titanate system
In this work, the thermal expansion behavior in the Ln2TiO5 system was explored, and mechanisms behind such behavior were described. The components of the thermal expansion tensor were calculated from the refined d-spacings using the program CTEAS for the cubic, orthorhombic, and hexagonal phases. …
-
Electrospun nanofibrous metal oxides as regenerable adsorbents for desulfurization of biomass-derived syngas
… vs Sample-2a), sorbent specimens rich in zinc titanates (Sample-2a) showed faster kinetics than the zinc oxide sorbents (both pre-reduced). It was found that it is possible to achieve complete regeneration without raising the sulfidation temperature (600C). Again, results from the XPS analysis …