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1638 results about "Galvanic deposition" patented technology

Deposition corrosion is a subtle form of galvanic cell that can produce pitting in a liquid environment when a more cathodic metal is plated out of solution onto a metal surface.

Electroless deposition apparatus

An apparatus and a method of depositing a catalytic layer comprising at least one metal selected from the group consisting of noble metals, semi-noble metals, alloys thereof, and combinations thereof in sub-micron features formed on a substrate. Examples of noble metals include palladium and platinum. Examples of semi-noble metals include cobalt, nickel, and tungsten. The catalytic layer may be deposited by electroless deposition, electroplating, or chemical vapor deposition. In one embodiment, the catalytic layer may be deposited in the feature to act as a barrier layer to a subsequently deposited conductive material. In another embodiment, the catalytic layer may be deposited over a barrier layer. In yet another embodiment, the catalytic layer may be deposited over a seed layer deposited over the barrier layer to act as a “patch” of any discontinuities in the seed layer. Once the catalytic layer has been deposited, a conductive material, such as copper, may be deposited over the catalytic layer. In one embodiment, the conductive material is deposited over the catalytic layer by electroless deposition. In another embodiment, the conductive material is deposited over the catalytic layer by electroless deposition followed by electroplating or followed by chemical vapor deposition. In still another embodiment, the conductive material is deposited over the catalytic layer by electroplating or by chemical vapor deposition.
Owner:APPLIED MATERIALS INC

Vapochromic led

A sandwich device was prepared by electrodeposition of an insoluble layer of oligomerized tris(4-(2-thienyl)phenyl)amine onto conducting indium-tin oxide coated glass, spin coating the stacked platinum compound, tetrakis(p-decylphenylisocyano)platinum tetranitroplatinate, from toluene onto the oligomer layer, and then coating the platinum complex with aluminum by vapor deposition. This device showed rectification of current and gave electroluminescence. The electroluminescence spectrum ( lambda max=545 nm) corresponded to the photoluminescence spectrum of the platinum complex. Exposure of the device to acetone vapor caused the electroemission to shift to 575 nm. Exposure to toluene vapor caused a return to the original spectrum. These results demonstrate a new type of sensor that reports the arrival of organic vapors with an electroluminescent signal. The sensor comprises (a) a first electrode; (b) a hole transport layer formed on the first electrode; (c) a sensing / emitting layer formed on the hole transport layer, the sensing / emitting layer comprising a material that changes color upon exposure to the analyte vapors; (d) an electron conductor layer formed on the sensing layer; and (e) a second electrode formed on the electron conductor layer. The hole transport layer emits light at a shorter wavelength than the sensing / emitting layer and at least the first electrode comprises an optically transparent material.
Owner:CALMEC +1

Preparation method of neodymium iron boron magnet

A preparation method of neodymium iron boron magnet is disclosed. The composition general formula of the magnet provided by the invention is R1R2FeMB, wherein R1 is at least one element selected from the group consisting of Nd, Pr, La, Ce, Sm, Sc, Y and Eu, having a content of 23 to 35 wt%; R2 is at least one element selected from the group consisting of Tb, Dy, Gd, and Ho, having a content of 0.1 to 5 wt%; M represents transition group metal with the exception of Fe, having the content of 0.01 to 5 wt%; B represents simple substance boron, having the content of 0.8 to 1.2 wt%; the balance isFe and the other inevitable impurities. The preparation method of neodymium iron boron magnet provided by the invention works in such a manner that: one or more elements in the R2 are plated to the surface of the magnet, the metal R2 is diffused into the interior of the magnet by primary high temperature heat treatment, and imbalance organization and internal stress brought by the high temperature treatment are eliminated through secondary low temperature tempering. Low temperature molten salt electrodeposition method is employed to plate films. The present invention is advantageous in greatly improving the production efficiency, reducing the dosage of the heavy rare earth during preparation process of magnet, saving rare earth resource, and obtaining high coercivity without reducing remanent magnetism and magnetic energy product of a magnet.
Owner:GRIREM ADVANCED MATERIALS CO LTD

Solution composition and method for electroless deposition of coatings free of alkali metals

An electroless deposition solution of the invention for forming an alkali-metal-free coating on a substrate comprises a first-metal ion source for producing first-metal ions, a pH adjuster in the form of a hydroxide for adjusting the pH of the solution, a reducing agent, which reduces the first-metal ions into the first metal on the substrate, a complexing agent for keeping the first-metal ions in the solution, and a source of ions of a second element for generation of second-metal ions that improve the corrosion resistance of the aforementioned coating. The method of the invention consists of the following steps: preparing hydroxides of a metal such as Ni and Co by means of a complexing reaction, in which solutions of hydroxides of Ni and Co are obtained by displacing hydroxyl ions OH beyond the external boundary of ligands of mono- or polydental complexants; preparing a complex composition based on a tungsten oxide WO3 or a phosphorous tungstic acid, such as H3[P(W3O10)4], as well as on the use of tungsten compounds for improving anti-corrosive properties of the deposited films; mixing the aforementioned solutions of salts of Co, Ni, or W and maintaining under a temperatures within the range of 20° C. to 100° C.; and carrying out deposition from the obtained mixed solution.
Owner:LAM RES CORP

Porous carbon/manganese dioxide composite electrode, preparation method of porous carbon/manganese dioxide composite electrode and rechargeable zinc-manganese ion battery

The invention relates to a porous carbon/manganese dioxide composite electrode, a preparation method of the porous carbon/manganese dioxide composite electrode and a rechargeable zinc-manganese ion battery, and belongs to the technical field of electrochemistry. Porous carbon with high specific surface area and favorable electric conductivity is taken as a carrier electrode; the carrier electrode is electrolyzed in flowing water solution which contains a manganous salt precursor and a supporting electrolyte; and manganese dioxide is deposited on the surface of the porous carbon. Through selecting the concentration of the manganous salt as well as the concentration, pH value, current, temperature and time of the supporting electrolyte in the electric deposition process, a porous carbon/manganese dioxide composite is prepared, so that the regulation and control of the particle size and distribution density of the manganese dioxide are realized, and the active substance utilization rate of the manganese dioxide is improved. By taking the obtained porous carbon/manganese dioxide composite as the electrode, and by using the water solution containing zinc and manganese ions as electrolyte to assemble secondary batteries, the specific capacity of the electrode is above 200mAh/g and the electrode has the characteristics of being high in capacity and long in service life. The preparation method is easy to operate, green and environmental.
Owner:中国人民解放军军事科学院防化研究院

Fence type anode plate for electrodeposition of nonferrous metals

The invention discloses a fence type anode plate for electrodeposition of nonferrous metals. The fence type anode plate for electrodeposition of the nonferrous metals is characterized in that lead or lead-based complex alloy with the thickness of 2-10mm is compounded on the surface of a rod core to form a composite rod; a corrugated or sawtooth type pattern is drawn on the surface of the composite rod; a conductive ceramic composite coating layer is coated or electrodeposited on the surface of the composite rod; the fence type anode plate is formed by assembling a plurality of the composite rods; and the composite rods are fixed by insulation edge clamping strips and clamped by insulation rivets. By the fence type anode plate for electrodeposition of the nonferrous metals, fluidity of electrolyte solution is improved, concentration polarization of a cathode area is reduced, and deposition amount of cathode metals is increased, so that cathode current efficiency is improved; the fence type anode plate does not bend and deform, and therefore short circuit phenomenon of anode and cathode plates is prevented; and compared with the conventional lead-based alloy anode plate, the conductivity of the fence type anode plate is obviously improved, the tank voltage is reduced by 10%, the material cost is reduced by 20% and the current efficiency is increased by 2-5%.
Owner:KUNMING HENDERA SCI & TECH

In-situ preparation of NiCo2Sx and NiCo2O4 on conductive substrate and application of NiCo2Sx and NiCo2O4 in energy storage device

The present invention relates to an in-situ preparation method of NiCo2Sx and NiCo2O4 on a conductive substrate and application of NiCo2Sx and NiCo2O4 in super capacitors and an anode catalyst of a direct methanol fuel cell (DMFC). The preparation method comprises two steps of electro-deposition and sulfuration (or calcination). The conductive substrate serves as a working electrode, electro-deposition is carried out under constant potential, and a cobalt-nickel layered double hydroxide (Co-Ni LDHs) is grown in situ growth. Co-Ni LDHs obtained through electro-deposition reacts with Na2S to prepare NiCo2Sx which is calcined in the air to prepare NiCo2O4. Through the two steps of electro-deposition and sulfuration (or calcination), in-situ growth of NiCo2Sx (NiCo2O4) on the conductive substrate is effectively realized, thereby avoiding usage of adhesives or conductive agents required for electrode preparation through a conventional coating method. The NiCo2Sx and NiCo2O4 grown directly on the conductive substrate can be directly used for researches of the super capacitors and anode non-platinum catalysts of the DMFCs. In an alkaline solution, NiCo2Sx and NiCo2O4 show a higher specific electric-capacity and a higher methanol catalytic oxidation efficiency than single metal sulfides such as NiSx and CoSx and single metallic oxides such as NiO and Co3O4.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY

Method for preparing metallic submicron microsphere array film and electric deposition device

The invention relates to a method for preparing a metallic submicron microsphere array film and an electric deposition device. The method comprises the following steps of: vertically self-assembling polystyrene microspheres to obtain an ordered microsphere array film grown on conductive glass, synthesizing a silicon dioxide macroporous nano net by using the ordered microsphere array film as an initial template and adopting a sol-gel method, and obtaining the metallic submicron microsphere array film attached to the conductive glass by using the nano net as a second-step template and adopting an electrochemical deposition method. The electric deposition device comprises a glass tube filled with electroplating liquid; a tube orifice is sealed by using a plug containing platinum opposite electrodes and a silver/silver chloride reference electrode on the upper part of the glass tube; and the lower part of the glass tube is connected with an inverse opal film attached to the surface of the conductive glass through an O-shaped gasket and fixed on the inverse opal film. The method solves the problem of difficulty in preparing the high-ordered metallic microsphere array film, and lays a foundation for researching three-dimensional photonic band gap performance of a metallic microsphere array, particularly silver spheres with special optical property.
Owner:BEIJING UNIV OF CHEM TECH

Carbon nanotube modified titanium based fluorine-containing lead dioxide electrode and preparation method thereof

The invention relates to a carbon nanotube modified titanium based fluorine-containing lead dioxide electrode and a preparation method thereof. The carbon nanotube modified titanium based fluorine-containing lead dioxide electrode is prepared by: taking a titanium plate as a substrate, polishing and etching the titanium plate substrate, performing thermal deposition of a tin antimony oxide base layer, then conducting electrodeposition of an alpha-PbO2 intermediate layer in an alkaline plating solution, and finally performing electrodeposition of a beta-PbO2 active layer in an acidic plating solution containing fluoride ions, a surfactant and a carbon nanotube. Compared with ordinary titanium based fluorine-containing lead dioxide electrodes, the carbon nanotube modified titanium based fluorine-containing lead dioxide electrode has high catalytic activity and long service life. The electrode can be used as an anode to treat organic wastewater, can achieve a good degradation effect, and can realize mineralization on poisonous and harmful organic matters that are difficult to degrade. Being easy and convenient to operate, the electrode provided by the invention is a potential electrode suitable for water treatment.
Owner:JILIN NORMAL UNIV
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