Thesis (Ph. D.)--State University of New York at Binghamton, Department of Chemistry, 2005. / Includes bibliographical references.

Koo Kai Ming = 具有黑色及灰色外貌的Ti-C, Ti-O和Ti-Zr-O裝飾硬膜之研究 / 古啓明. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references. / Text in English; abstracts in English and Chinese. / Koo Kai Ming = Ju you hei se ji hui se wai mao de Ti-C, Ti-O he Ti-Zr-O zhuang shi ying mo zhi yan jiu / Gu Qiming. / Acknowledgements --- p.I / Abstract --- p.II / 論文摘要 --- p.IV / Table of Contents --- p.VI / List of Figures --- p.IX / List of Tables --- p.XIII / Chapter CHAPTER 1 --- Introduction --- p.1-1 / Chapter 1.1 --- Overview and objectives --- p.1 -1 / Chapter 1.2 --- Criteria for decorative coatings --- p.1 -2 / Chapter 1.2.1 --- Color appearance --- p.1 -2 / Chapter 1.2.2 --- Corrosion resistance --- p.1 -7 / Chapter 1.2.3 --- Tribological properties --- p.1-7 / Chapter 1.3 --- Coating techniques --- p.1 -8 / Chapter 1.3.1 --- Plasma activated e-beam evaporation --- p.1 -8 / Chapter 1.3.2 --- Cathodic arc deposition (CAD) --- p.1-10 / Chapter 1.3.3 --- Closed field unbalanced magnetron sputtering (CFUBMS) --- p.1-10 / Reference --- p.1-16 / Chapter CHAPTER 2 --- Instrumentation --- p.2-1 / Chapter 2.1 --- Film fabrication --- p.2-1 / Chapter 2.1.1 --- Deposition system --- p.2-1 / Chapter 2.1.2 --- Optical emission control in reactive sputtering --- p.2-3 / Chapter 2.1.3 --- Asymmetric bipolar pulsed DC biasing --- p.2-5 / Chapter 2.1.4 --- Two/Three axis rotation system --- p.2-5 / Chapter 2.1.5 --- Substrate --- p.2-8 / Chapter 2.1.6 --- Deposition procedure --- p.2-9 / Chapter 2.2 --- Characterization --- p.2-10 / Chapter 2.2.1 --- Thickness --- p.2-10 / Chapter 2.2.2 --- Structural information --- p.2-11 / Chapter 2.2.3 --- Chemical compositions and chemical state of the film elements --- p.2-11 / Chapter 2.2.4 --- Amorphous carbon phase structure --- p.2-14 / Chapter 2.2.5 --- Surface morphology --- p.2-14 / Chapter 2.2.6 --- Reflection in the visible light range --- p.2-14 / Chapter 2.2.7 --- Color impression --- p.2-15 / Chapter 2.2.8 --- Film mechanical properties --- p.2-19 / Chapter 2.2.9 --- Scratch resistance (Adhesion) measurement --- p.2-19 / Reference --- p.2-21 / Chapter CHAPTER3 E --- ngineering black decorative coatings with the Ti - C family by reactive ion plating --- p.3-1 / Chapter 3.1 --- Introduction --- p.3-1 / Chapter 3.2 --- Experiment --- p.3-2 / Chapter 3.3 --- Results --- p.3-5 / Chapter 3.3.1 --- Variations in color appearance --- p.3-5 / Chapter 3.3.2 --- Nanoindentation hardness --- p.3-10 / Chapter 3.3.3 --- Scratch resistance --- p.3-14 / Chapter 3.3.4 --- Composition and microstructure --- p.3-17 / Chapter 3.3.5 --- Amorphous carbon structure --- p.3-22 / Chapter 3.4 --- Conclusions --- p.3-31 / Reference / Chapter CHAPTER 4 --- Study on the colorimetric/optical properties of nonstoichiometric Ti - O thin films --- p.4-1 / Chapter 4.1 --- Introduction --- p.4-1 / Chapter 4.2 --- Experiment --- p.4-2 / Chapter 4.3 --- Results and discussions --- p.4-4 / Chapter 4.3.1 --- Variations in color appearance --- p.4-4 / Chapter 4.3.2 --- Nanoindentation hardness --- p.4-9 / Chapter 4.3.3 --- Composition and microstructure --- p.4-13 / Chapter 4.4 --- Conclusions --- p.4-29 / References --- p.4-30 / Chapter CHAPTER 5 --- Doping the nonstoichiometric Ti - O coatings with zirconium --- p.5-1 / Chapter 5.1 --- Introduction --- p.5-1 / Chapter 5.2 --- Experiment --- p.5-1 / Chapter 5.3 --- Results and discussions --- p.5-4 / Chapter 5.3.1 --- Reflectivity and hardness --- p.5-4 / Chapter 5.3.2 --- Composition and microstructure --- p.5-7 / Chapter 5.4 --- "Comparison of the optical properties for Ti-C, Ti-O and Ti-Zr-0" --- p.5-14 / Chapter 5.4.1 --- Black color --- p.5-14 / Chapter 5.4.2 --- Grey color --- p.5-14 / Chapter 5.5 --- Conclusions --- p.5-20 / References / Chapter CHAPTER 6 --- Conclusion --- p.6-1 / Chapter 6.1 --- Future works --- p.6-2

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This Thesis describes the synthesis and characterisation of titanium hydrazido(2-) and alkylidene hydrazido(2-) complexes and their reactivity towards unsaturated molecules. Exploration of the bonding in titanium hydrazido(2-) and alkylidene hydrazido(2-) complexes is performed through structural and computational studies. Chapter 1 introduces current Group 4 hydrazido chemistry in comparison to Group 4 imido and mid/late metal hydrazido examples. Current Group 4 alkylidene hydrazido chemistry is also described. Chapter 2 describes the synthesis, bonding and the novel reaction chemistry of titanium hydrazido(2-) half-sandwich complexes. Novel reactivity at the Ti=N, bond is presented with the mechanisms of some of these transformations probed by Density Functional Theory (DFT) calculations. Chapter 3 describes the novel reaction chemistry of Cp*Ti{MeC(Nipr)2} (NNMe2) in comparison to its imido and diphenyl hydrazido analogues. Novel reactivity at both Ti=N, and Na-N~ bonds is presented with the mechanisms of some of these transformations probed by Density Functional Theory (DFT) calculations. Chapter 4 describes the synthesis and characterisation of a new titanium alkylidene hydrazido(2-) complex. The bonding of the alkylidene hydrazido(2-) ligand is explored through structural and computational studies. Novel reactivity at Ti=N, and Na-N~ bonds is presented. Chapter 5 presents full experimental procedures and characterising data for the new complexes reported. CD Appendix contains .cif files for all new crystallographically characterised complexes described.

Thesis--University of Florida. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 235-244).

Novel low temperature wet chemical processes for the synthesis of gels and ultrafine powders of BaTiO₃ and BaTi₄O₉ were developed. Under acidic conditions a titanyl acylate precursor was obtained by molecular modification of titanium isopropoxide. In the sol-gel process, amorphous BaTiO₃ gels obtained under acidic conditions were heat treated at ≈950-1000°C yielding fine (≈ 1-3 μm), high purity (99.9%) stoichiometric (Ba/Ti = 0.99) BaTiO₃ powders. In the sol-precipitation process, ultrafine (≈ 10 nm) crystalline BaTiO₃ powders were directly precipitated at low temperatures (<100°C) from a stoichiometric titanium acylate- barium acetate sol (pH > 13.5). Precursor powders obtained by hydrolytic decomposition of barium and titanium alkoxides were heat treated at 1100°C to obtain high purity, homogeneous, single phase BaTi₄O₉ powders. Atomistic pathways for the evolution of crystalline phases from amorphous gels and powders were investigated. The microstructure and electrical properties of sintered BaO-TiO₂ ceramics were studied and correlated with the powder processing conditions. The structures of crystalline and amorphous forms of some materials in the BaO-TiO₂ system were simulated using molecular dynamics computer techniques to develop a fundamental understanding of structure-property relationships for BaTiO₃ and TiO₂ containing glasses.

A dissertation submitted in fulfilment of the requirements of the degree of Master of Science. Department of Chemistry. University of the Witwatersrand. Johannesburg 2016. / The lattice parameters and thermal expansion coefficients for La2Hf2O7, Eu2Hf2O7, Gd2Hf2O7, Y2Hf2O7, Gd2Zr2O7, Y2Zr2O7, Eu2Ti2O7, Gd2Ti2O7, and Y2Ti2O7 were determined relative to temperature over the range of 30°C to 850°C. All materials were determined to be of the pyrochlore phase expect for Y2Hf2O7, which crystallised in the defect fluorite phase. All materials were shown to have positive thermal expansion, which was not consistent over the experimental temperature range. The change in the thermal expansion coefficient was positive for La2Hf2O7, Y2Zr2O7, Eu2Ti2O7 and Y2Ti2O7, of which the largest change was experienced by Y2Zr2O7. The remaining materials experienced a negative change in their thermal expansion coefficients. The largest negative change was experienced by Gd2Ti2O7. It was shown that the x parameter of the 48f oxygen atom increased with increasing temperature. This had the effect of distorting the transition metal octahedral, and creating a more perfect rare-earth cube as the parameter increased. / TG2016

Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2007. / Includes bibliographical references. Also available in electronic version.