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Fabrication and Application of Diachem Electrodes

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DIAM Electrically conductive diamond coated electrodes have been developed in recent years. The unique electrochemical properties of diamond electrodes such as their extreme chemical resistance, even at high doping concentrations, and high overvoltage for water electrolysis opens the door to numerous applications. For their industrial use, sufficient availability, and this in the form of large area electrodes is necessary. The development of large area DIACHEM process allows for reproducible coatings of substrates up to 50 X 100 cm. Doping with boron allows the reproducible setting of the resistivity of the diamond coating in the range of 5 to 100 mohm cm. DIACHEM electrodes can presently be applied in various industrial applications. The most important of these include: industrial waste water treatment, in particular the mineralization of toxic organic compounds; the disinfection of water, circulation system with water which are only possible through use of an electrochemical recycling process; electrochemical synthesis, in particular from strong oxidising solutions and galvanic processes such as the recycling of chromium (chromate) baths. Previous investigations have shown that the use of DIACHEM electrodes results in either a significant improvement in the effectiveness or that the process was only possible through use of this particular electrode material. CONDIAS GmbH offers the DIACHEM electrode commercially.

Fabrication and application of diamond films for dry forming die.

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Fabrication and Applications of Polymer Microchannel Chips

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Fabrication and characterisation of laser surface modified plasma sprayed alumina coatings

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A surface specific CO2 laser was used treat thick alumina coatings formed using an air plasma spray process with the aim of converting the porous metastable gamma alumina phase invariably present to the more stable alpha form. An increase in Vickers hardness from ca. 1100 to ca. 2300 HV was found.

Fabrication and characterisation of nickel coated Ni-NCZ (nickel coated ZrO2) composite coating.

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SFEN For the first time, electroless nickel plated ZrO2 (Ni-NCZ) particles were used for the co-electrodeposition of Ni-NCZ composite coating. Optical microscope, SEM and X-ray diffraction studies showed that Ni-NCZ has a rough surface with a smaller Ni crystallite size than Ni-ZrO2 due to the conductive properties of NCZ particles, which provide more nucleation sites for Ni clusters. The energy dispersive X-ray spectroscopy measurement results showed that Ni-NCZ has more co-electrodeposited particles than Ni-ZrO2. This is due to the more positive zeta potential of NCZ particles compared to that of ZrO2. The microhardness measurements demonstrated that the Ni-NCZ composite coating has a higher microhardness than Ni-ZrO2 due to the higher amounts of co-electrodeposited particles and lower crystallite size. Electrochemical impedance spectroscopy and potentiodynamic polarisation test showed that the corrosion resistance of Ni-NCZ is higher than that of Ni-ZrO2.

Fabrication and characterisation of plasma processed surfaces with tuned wettability.

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Changes in wettability are described of a silicon surface that was coated with a proprietary photoresist. Control

Fabrication and Characteristics of a Nanostructure PbO2 Anode and its Application for Degradation of Phenol.

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JES

Fabrication and characteristics of SiO(x) films by plasma chemical vapor deposition of tetramethylorthosilicate

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Fabrication and Characteristics of ZnO Thin Films with an Al/Si ( 1 0 0 ) Substrates.

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MCP Highly ( 0 0 2 ) oriented ZnO thin films were synthesized on the Al/Si ( 1 0 0 ) substrates by DC reactive magnetron sputtering. X-ray diffraction (XRD), scanning electronic micro-spectra (SEM), spreading resistance profile (SRP and second ion mass spectrocopy (SIMS) were used to determine the structural and electrical properties of ZnO/Al/Si. The results indicated that ZnO epilayers were highly c-axis oriented and that the surface of the ZnO was very clean and smooth. The Al/Si ( 1 0 0 ) substrate is a very suitable substrate for growing the ZnO thin films. There was a sharp transitional region between the ZnO thin films and Al membrane. Based on the prepared ZnO thin films, Schottky diodes were successfully fabricated by Standard IC technique. Gold Schiottky contact on n-type ZnO showed -0.14µA leakage current to 1 V reverse bias, and ideality factor is 1.5.

Fabrication and characterization of Ni-P-Al-W multicomponent coatings.

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Fabrication and Characterization of Cellular Devices with Microelectrode Systems.

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Fabrication and Characterization of Diamond Quartz Crystal Microbalance Electrode

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JES Abstract avail. online. (JE)

Fabrication and characterization of double-sided YBCO superconducting thin films using laser ablation

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SURF Epitaxial growth of double-sided high-T(c) superconducting (HTSC) thin film was systematically investigated. Highly c-axis oriented YBa2Cu3O(7-x) (YBCO) superconducting thin films on (100) MgO substrates were fabricated by pulsed laser deposition (PLD), because devices like microwave stripline filters for communication systems require high-quality HTSC thin films on both sides of single crystal wafers. To use 1-sided film as low-loss ground plane, halogen lamp was used to heat substrate without silver paste to preserve its backside for the fabrication of double-sided superconducting thin films. The electrical property and the structural characteristics of YBCO films was studied. Film orientation was changed from fully c-axis near substrate/film interface to mixture of a-axis and c-axis near the film surface. This should be considered in the manufacture of superconducting microwave devices. By optimizing the thickness and deposition temp. of YBCO thin films, highly c-axis-oriented double-sided YBCO thin films were fabricated.Transition temp. of films was c. 88 K.

Fabrication and Characterization of Electrodeposited Nickel/Zirconium-Silicate Composite Coating.

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SURF Ni-Zr-silicate (Ni-zircon) composite coating was electrodeposited on mild steel using Watts nickel bath. Fine (5-10 µm) and coarse (40-60 µm) zirconia particles were used. The study compared the effect of zircon addition to the electrolyte on the hardness and wear resistance properties of composite coatings. The results obtained indicated that the codeposition of reinforced particles of zircon to Watts nickel bath improved the hardness and wear resistance of mild steel samples compared with zircon free nickel bath. On the other hand, microstructure of Ni matrix was changed by the addition of the hard Zr-Silicate particles. It is confirmed that the wear resistance of codeposited layer increases with addition of 25 g/l of large Zr-silicate particles. Moreover, wear resistance increases as the amount of fine zircon particles (5-10 µm) increases.

Fabrication and Characterization of Integrated Ultrahigh-Density Iron-Platinum Alloy Nanowire Arrays on Glass.

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JES