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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
121

Effects of aluminum and zirconia contents on the reaction bonded aluminum oxide process /

Sheedy, Paul Martin, January 2002 (has links)
Thesis (Ph. D.)--Lehigh University, 2003. / Includes vita. Includes bibliographical references (leaves 165-174).
122

Effects of sandblasting on resin composite bonding to zirconia and titanium

Ho, Beatrice Jane, 何沛枝 January 2013 (has links)
published_or_final_version / Dental Materials Science / Master / Master of Science in Dental Materials Science
123

Electronic spectroscopy of OH and ZrN

陳文端, Chan, Man-tuen. January 1997 (has links)
published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy
124

Characteristics of zirconium tetrachloride thermal plasmas : a thesis

Spiliotopoulos, Panayotis Z. January 1983 (has links)
No description available.
125

Sterically hindered chiral transition metal complexes

Bridgewater, Brian Michael January 1998 (has links)
This thesis describes the synthesis, characterization and study of a series of organometallic compounds which all contain the same new ligand, l-phenyl-3-methyl-4,5,6,7-tetrahydroindenyl. The ligand forms a chiral complex once coordinated, and is relatively bulky when compared with ligands such as cyclopentadienyl or 4,5,6,7-tetrahydroindenyl.Chapter one of this thesis introduces cyclopentadienyl ligand chirality, cyclopentadienyl metal complex chirality and sterically demanding cyclopentadienyl systems. The synthesis and chemistry of tetrahydroindenes and some applications of chiral cyclopentadienyl metal complexes and their bulky analogues are also reviewed. Chapter two describes modifications to a literature preparation of the tetrahydroindenone precursor of the new tetrahydroindenyl ligand which lead to higher yields. The synthesis of the ligand itself is described, as well as the synthesis of a benzylidene-substituted hexahydroindene, which demonstrates a limitation in the flexibility of the synthetic route chosen. The synthesis, characterization and various properties of the following iron(II) compounds are discussed in chapter two; bis-l-phenyl-3-methyl- 4,5,6,7-tetrahydroindenyl iron (II), 2.3, l-phenyl-3-methyl-4,5,6,7-tetrahydroindenyl iron(II) dicarbonyl dimer, 2.4, and l-phenyl-3-methyl-4,5,6,7-tetrahydroindaiyl methyl dicarbonyl iron(II), 2.5. For all these iron complexes, the solid state molecular structures and the absolute configuration of the chiral ligand were determined using single crystal X-ray d iffraction. For 23 and 2.4, three isomers are possible, two enantiomers that are collectively termed the rac-isomer and a third isomer, the meso- isomer. Cyclic voltammetric studies on 2.3 indicate that it has a reversible one electron oxidation at 0.187 V (with respect to a non-aqueous Ag/AgCl standard electrode). The difference between this and the reversible one electron oxidation for (η-C(_5)H(_5))(_2)Fe (with respect to the same standard) is -0.314 V, therefore 2.3 is shown to be much more easily oxidized than (η-C(_5)H(_5))(_2)Fe. The solution-state infi-a-red spectrum of 2.4 is explained, with reference to a literature analysis of the unsubstituted analogue [CpFe(CO)(_2)](_2). The steric forces present in the various molecular environments are discussed in connection with the degree of phenyl-ring tilt relative to the cyclopentadienyl mean plane and the deviation of the other cyclopentadimyl substituents away from the metal centre. Subsequent reactions of compounds 2.4 and 2.5 are described. Attempts to make linked analogues of the new ligand are summarized in chapter two. In chapter three, two Zr(rV) compounds are prepared, bis (l-phenyl-3-methyl-4,5,6,7-tetrahydroindenyi) zirconium(fV) dichloride, 3.1, and bis (l-phenyl-3-methyl-4,5,6,7-tetrahydroindenyl) dimethyl zirconium(TV), 3.2. Upon crystallization, rac-3.1 spontaneously resolves into crystals containing only one enantiomer. The similarities and differences in the spectroscopic data for the iron(n) compounds of chapter two and the zirconium(IV) compounds of chapter three are discussed and possible explanations offered . The solid state molecular structures of 3.1 and 3.2 were determined by single crystal X-ray diffraction. Experimental details are given in chapter four, whilst the characterizing data are presented in chapter five. Details of the X-ray structure determinations are given in Appendix A.
126

The synthesis and characterization of bis(4-(3-(4-phenoxy)propionitrile))-N, N-disalicylidene-1,2-phenylenediamino)zirconium(IV), Zr(nitrile)₂ and the attempted synthesis of Zr(amine)₂ and coordination polymers containing Zr(dspOH)₂ /

Brodsky, Kathy-Jo. January 1994 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 1994. / Typescript. Includes bibliographical references (leaves 136-140).
127

Étude expérimentale, à haute température et haute pression, du système ternaire UO-ThO-SiO en présence d'une phase fluide : comparaison avec les systèmes ZrO-ThO-SiO et UO-ZrO-SiO : implications géologiques /

Zimmer, Patrick. January 1986 (has links)
Th. 3e cycle--Sci. des matériaux--Nancy 1, 1983. / Bibliogr. p. 219-225.
128

Electronic spectroscopy of OH and ZrN /

Chan, Man-tuen. January 1997 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1997. / Includes bibliographical references.
129

Crystallization of amorphous alloy and the associated changes of properties

Lau, King Cheung. January 2005 (has links) (PDF)
Thesis (M.Sc.)--City University of Hong Kong, 2005. / At head of title: City University of Hong Kong, Department of Physics and Materials Science, Master of Science in materials engineering & nanotechnology dissertation. Title from title screen (viewed on Sept. 1, 2006) Includes bibliographical references.
130

Emission characteristics and electron optical properties of the ZrO/W point cathode /

Tuggle, David William. January 1984 (has links)
Thesis (Ph. D.)--Oregon Graduate Center, 1984.

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