نتایج جستجو برای: niobium surface preparation
تعداد نتایج: 799254 فیلتر نتایج به سال:
A novel, highly stable, non-carbon support system for the oxygen reduction reaction (ORR) has been discovered in the form of nano-structured (NbxTi1-x)Ns (x = 0.25 and 0.5). Template-free, solid-solid separation synthetic approaches have been used for preparing these materials. The (NbxTi1-x)N materials have high specific surface area and better electronic conductivity than carbon-based supports.
| A set of tri-stable RSFQ cells has been designed, simulated, fabricated in Hypres, Inc. using 1 kA=cm 2 low-Tc Niobium technology and successfully tested. The elements (including a generic X cell, XOR and inverted XOR cells) are fully compatible with binary RSFQ circuits and do not require any in-put/output conversion. Their use provides an eeec-tive way to simplify some complex functional RS...
We report on a 850 GHz SIS heterodyne receiver employing a RF tuned niobium tunnel junction with a current density of 14kA/cm2, fabricated on a 1 μm Si3N4 supporting membrane. Since the mixer is designed to be operated well above the superconducting gap frequency of niobium (2 /h ≈ 690 GHz), special care has been taken to minimize niobium transmission line losses. Both Fourier Transform Spectro...
We have used energy-filtered x-ray photoelectron emission microscopy (XPEEM) and synchrotron radiation to measure the grain orientation dependence of the work function of a sintered niobium-doped strontium titanate ceramic. A significant spread in work function values is found. Grain orientation and surface reducing/oxidizing conditions are the main factors in determining the work function. Ene...
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