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.
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Showing 1 to 8 of 8 for “"cation distribution"”.
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Synthesis, cation distribution, and disorder of fast-ion conducting pyrochlore oxides : a combined neutron and X-ray Rietveld analysis
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.
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Investigation on the phase stability and defect structure of Li-Mn-O and Li-Me-Mn-O spinel (Me=Mg, Ni, Co)
… of the dopant concentration. Three types of cation distribution are proposed to describe the referential state of the lithium excess or lithium deficit spinel. On the basis of referential state of cation distribution the delta dependence on pO2 in (Li, Mn)3O4–delta and (Li, Me, Mn)3O4–delta …
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Magnetic Nanoparticles Based on Iron: Synthesis, Characterization, Design, and Application
… are of great interest for a wide range of applications. This work has focused on three primary forms of iron based nanoparticles and combinations thereof: α-iron, iron oxide, and iron carbide or cementite. The synthesis of several core-shell particles including cementite-iron oxide, …
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Effect of sodium catchments on soluble soil salts, leaf ion concentration, and the yield of fruit in a water harvesting system.
… determine the effect of sodium catchment on the distribution of soluble salts and exchangeable ions in soil, leaf ion concentration, and yield of peaches. The experiments were conducted at the Oracle Agricultural Center, formerly known as Page Ranch, University of Arizona, for a period of two …
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Cation-disordered oxides for rechargeable lithium battery cathodes
… rechargeable lithium batteries for complex applications such as in electric vehicles or in grid energy storage. Nearly all high-energy density cathode materials for rechargeable lithium batteries have been sought from well-ordered close-packed oxides in which lithium and transition metal ions …
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High-pressure and high-temperature structural and electronic properties of (Mg,Fe)O and FeO
… Mössbauer spectra shows clear evidence for the distribution of the hyperfine parameter quadrupole splitting (D), which provides a key to determining its local structure. It is shown that by analyzing the D distribution, a short-range order parameter could be estimated for the low-Fe (Mg,Fe)O …
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Untersuchungen zur Dehydroxilierung dioktaedrischer Smectite
… used in a broad spectrum of technical applications and processes. They seem to be one of the most important indsutrial minerals. By using smectites in thermal technology processes their behaviour plays an important role. So far many questions concerning these characteristics are still open. …
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The crystal chemistry of hibonite: an indicator for oxygen fugacity during Solar nebula condensation?
… on the possible interactions of Ti with other cations substituting for Al such as, for example, Mg. The aim of this thesis is, therefore, to correctly determine the cation distribution of Ti in synthetic and meteoritic samples and to quantify their Ti(3+)/Ti(tot) ratios from spectroscopic data. …