During atomic layer deposition (ALD) of uniform LayZr1-yOx thin films, spontaneous segregation of ZrO2 nanocrystals takes place that are embedded in an amorphous La2O3 matrix. This occurs if the Zr content in the LayZr1-yOx film is above 30% i.e. if the pulse ratio between the lanthanum precursor and the zirconium precursor is larger than six. We study this clustering phenomena using High resol...

Previous experiments have shown that tritium is produced in deuterated titanium. To better define the phenomenon a series of tests have been performed using various metals and alloys and different deuterating conditions. Sheets and shavings of titanium, zirconium, hafnium, tantalum, Zircaloy 2 and Ti-Zr 50% alloy have been tested. A statistical analysis of the tritium production shows that sign...

The reaction of zirconium(IV) porphyrinogen with water yields a dinuclear complex in which one mu-oxo ligand bridges two Zr(IV) centres, and two protons are bound to the alpha carbons of two porphyrinogen pyrroles. The reaction establishes the utility of the porphyrinogen macrocycle as a storage site for protons as well as electrons.

An efficient, electrically conductive, chemical barrier for the integration of piezoelectric Pb(Zr,Ti)O3 (PZT) films on reactive metal substrates has been developed, opening new possibilities for PZT integration on micromechanical and semiconductor devices, Very reactive zirconium films have been taken in order to test the quality of the specially designed RuO2/Cr buffer under the condition of ...

The attachment chemistry required for the sequential self-assembly of zirconium phosphonate (ZP) monolayers on gold and germanium surfaces is examined with a combination of attenuated total reflection (ATR-FTIR) and polarization modulation (PM-FTIR) Fourier transform infrared spectroscopies. On the germanium substrates, the conversion of an attached o-aminosilane monolayer to phosphate amide sp...

The electronic band structure, density of states, structural phase transition and super conducting transition temperature of group –IV B element Zirconium (Zr) under normal and high pressure are reported. The normal pressure band structure, density of states and superconducting transition temperature of hcp Zr agree well with the previous calculations. The high pressure band structure exhibits ...

Salt metathesis reactions of Cp(2)(NR(2))ZrX (X = Cl, I, OTf) and lithium hydrosilazides ultimately afford hydride products Cp(2)(NR(2))ZrH that suggest unusual β-hydrogen elimination processes. A likely intermediate in one of these reactions, Cp(2)Zr[N(SiHMe(2))t-Bu][N(SiHMe(2))(2)], is isolated under controlled synthetic conditions. Addition of alkali metal salts to this zirconium hydrosilazi...

Zirconium amides have become increasingly popular and useful due to their widespread use as precursors to other zirconium complexes and their use in the production of solid oxide fuel cells (SOFCs). Herein we report the mol-ecular structure of tris-(di-methyl-amido)-bis-(di-methyl-amine)-zirconium(IV) iodide, [Zr(C2H6N)3(C2H7N)2]I. The bond lengths and bond angles are consistent with a slightly...

Novel composite membranes for high temperature polymer-electrolyte fuel cells (HT-PEFC) based on a poly[oxy-3,3-bis(4'-benzimidazol-2″-ylphenyl)phtalide-5″(6″)-diyl] (PBI-O-PhT) polymer with small amounts of added Zr were prepared. It was shown in a model reaction between zirconium acetylacetonate (Zr(acac)4) and benzimidazole (BI) that Zr-atoms are capable to form chemical bonds with BI. Thus,...

The phase analysis of Cu-0.41%Cr-0.20%Zr alloy treated by vacuum melting + solid solution aging was carried out means SEM, TEM, EDXS and XRD. results show that there are three phases in the alloy, namely copper matrix phase, chrome-rich zirconium-rich phase. distribution size is bimodal. coarse microns scale, main components elemental chromium Cu 5 Zr, which formed during casting process not ea...