نتایج جستجو برای: zirconium zr
تعداد نتایج: 15415 فیلتر نتایج به سال:
In the title compound, [Zr(C(5)H(4)F(3)O(2))(4)]·C(7)H(8), the Zr atom is in a square-anti-prismatic coordination geometry that comprises four O,O'-bidentate trifluoro-acetyl-acetonate ligands. The O-Zr-O bite angles of the acetonate ligands range from 75.27 (5) to 75.41 (5)°. The Zr atom is located on a twofold rotation axis.
The structural properties of (Bi0.5Na0.5)Ti1-xZrxO3 (where 0 ≤ x ≤ 0.7) have been investigated using powder diffraction and X-ray absorption spectroscopy. Diffraction measurements on (Bi0.5Na0.5)TiO3 confirm that both monoclinic Cc and rhombohedral R3c phases are present at room temperature. Doping small amounts of Zr into the B site of (Bi0.5Na0.5)TiO3 initially stabilizes the rhombohedral pha...
In the present work, ceria, ceria-zirconia (Ce = 80 at.%, Zr = 20 at.%), ceria praseodymia (Ce = 80 at.%, Pr = 20 at.%) and ceria-zirconia-praseodymia catalysts (Ce = 80 at.%, Zr = 10 at.% and Pr = 10 at.%) have been prepared by the multi-inlet vortex reactor (MIVR). For each set of samples, two inlet flow rates have been used during the synthesis (namely, 2 ml min-1, and 20 ml min-1) in order ...
Received 25 August 2014, Revised 08 December 2014, Accepted 10 December 2014 -------------------------------------------------------------------------------------------------------------------------------------------Abstract Rutin, one of the excellent chelating agents, has been made to react with Zr and MoO4 ions to get metal complexes in methanol. The synthesis, spectral properties (UV-Vis, H...
The unusual reactivity of hafnocene complexes in comparison to their titanium and zirconium analogues was dramatically demonstrated in the recent functionalization of coordinated N2 and the coupling of CO2 and N2 to a substituted hydrazine product. The differences in their structure and bonding were also noticed; for example, the s and p ratio of the diene bonding in (s-cis-h-diene) metallocene...
• A Zirconium labeled drug was visualized in tumors by Imaging Mass Spectrometry. Time of Flight Secondary Ion Spectrometry (ToF-SIMS) used parallel with immunohistochemistry. ToF-SIMS is a quick and sensitive technique to image zirconium labelled biologics. high-precision complement immunoPET using the same established radiotracers. The human epidermal growth factor receptor 2 (HER2) specific ...
These studies focused on a new radiolabeling technique with copper ((64)Cu) and zirconium ((89)Zr) for positron emission tomography (PET) imaging using a CD45 antibody. Synthesis of (64)Cu-CD45 and (89)Zr-CD45 immunoconjugates was performed and the evaluation of the potential toxicity of radiolabeling human peripheral blood stem cells (hPBSC) was assessed in vitro (viability, population doublin...
This review considers current Zr alloys and opportunities for advanced zirconium to meet the demands of a structural material in fusion reactors. based materials breeder blanket offer potential increase tritium breeding ratio above that Fe, Si V materials. Current commercial might be considered as water-cooled designs, due similar operating temperature fission power plants. For blankets designe...
Reactive nanolaminates afford a promising route for the low-temperature synthesis of zirconium diboride, an ultrahigh-temperature ceramic with metallic properties. Although the addition of carbon is known to facilitate sintering of ZrB2, its effect on the kinetics of the formation reaction has not been elucidated. We have employed a combined approach of nanocalorimetry and first-principles theo...
Internal friction peaks PI, P2 and P3 were determined by the composite oscillator technique (APUCOT) at 40 and 120 lcHz in unalloyed Zr + H and in Zr-2.5Nb + H. The effect on the peaks of hydrogen content, thermal cycling and ageing was investigated. PI can be increased by misfit dislocations due to hydrides. The height of P2 is proportional to the total content of hydrogen while P3 depends on ...
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