Synthesis and structural characterization of the bi-based superconductors

Bilgici, Serdar Ziya


Synthesis and structural characterization of Co-Al based superalloys
Dinler, Ali Fırat; Mekhrabov, Amdulla O.; Department of Metallurgical and Materials Engineering (2019)
Co-based superalloys are commonly used in static components such as stationary vanes because of their superior hot corrosion, oxidation, sulfidation resistance and phase stability at elevated temperatures. They possess relatively lower strength values due to limits in strengthening with solid solution and/or carbide precipitation that makes them unusable for blade and disk applications requiring higher strength values. However, Co-based superalloys with L12 ordered γ’-Co3(Al,W) microstructure has recently d...
Synthesis and characterization of Co-Pb/SBA-15 mesoporous catalysts
Akça, Burcu; Üner, Deniz; Department of Chemical Engineering (2006)
Co and Pb are soft oxides, making them useful in partial oxidation catalysis. But it is difficult to prepare high surface area, nanometer size particles due to the low melting point of Pb. In the present study, SBA-15 samples are incorporated with Co and/or Pb at different weight loadings to provide a controlled geometry in nanometer scale via using direct synthesis method. The characterization of the synthesized samples was done by XRD, N2 adsorption isotherms, TEM images and XPS analysis. The increase in ...
Synthesis and characterization of the [Ni6Ge13(CO)(5)](4-) and [Ge9Ni2(PPh3)](2-) Zintl ion clusters
Nalbant Esentürk, Emren; Eichhorn, B (Elsevier BV, 2006-01-23)
Reactions between K4Ge9, Ni(CO)(2)(PPh3)(2), and 2,2,2-crypt in ethylenediamine solutions give two different products depending on reaction conditions. The [Ni6Ge13(CO)(5)](4-) ion (1) is formed at low temperatures (similar to 40 degrees C) and short reaction times whereas the [Ge9Ni2(PPh3)](2-) ion (2) forms at higher temperatures (similar to 118 degrees C). Both complexes were isolated as [K(2,2,2-crypt)](+) salts and characterized by single-crystal X-ray diffraction, electrospray mass spectrometry (ESI-M...
Synthesis and characterization of Pd-MCM-type mesoporous nanocomposite materials
Şener, Canan; Doğu, Timur; Department of Chemical Engineering (2006)
Noble metal incorporated MCM-41 based nanostructured mesoporous materials have attracted the attention of material researchers in recent years. Sorption characteristics of MCM materials can be improved by surface modification techniques. Besides surface modification, metal nanoparticles can also be produced within the pores of mesoporous materials. MCM-41 can act as host for several metal nanoparticles such as palladium. The present study is focused on the synthesis of Pd-MCM-41 nanocomposite catalytic mate...
Synthesis and characterization of epoxy based nanocomposites
Basara, G; Yılmazer, Ülkü; Bayram, Göknur (Wiley, 2005-11-01)
Epoxy-clay nanocomposites were synthesized to examine the effects of the content and type of different clays on the structure and mechanical properties of the nanocomposites. Diglycidyl ether of bisphenol-A (epoxy) was reinforced by 0.5-11 wt % natural (Cloisite Na+) and organically modified (Cloisite 3013) types of montmorillonite. SEM results showed that as the clay content increased, larger agglomerates of clay were present. Nano-composites with Cloisite 30B exhibited better dispersion and a lower degree...
Citation Formats
S. Z. Bilgici, “Synthesis and structural characterization of the bi-based superconductors,” Middle East Technical University, 2000.