Abstract: A process for making silver nanostructures, which includes the step of reacting at least one polyol and at least one silver compound that is capable of producing silver metal when reduced, in the presence of: (a) a source of chloride or bromide ions, and (b) at least one copolymer that comprises: (i) one or more first constitutional repeating units that each independently comprise at least one pendant saturated or unsaturated, five-, six-, or seven-membered, acylamino- or diacylamino-containing heterocylic ring moiety per constitutional repeating unit, and (ii) one or more second constitutional repeating units, each of which independently differs from the one or more first nonionic constitutional repeating units, and has a molecular weight of greater than or equal to about 500 grams per mole, is described herein.

Abstract: Provided are resin-based and metal-based anti-thermally-expansive members each having small thermal expansion. More specifically, provided are an anti-thermally-expansive resin and an anti-thermally-expansive metal, each including a resin or a metal having a positive linear expansion coefficient at 20° C. and a solid particle dispersed in the resin or metal, in which the solid particle includes at least an oxide represented by the following general formula (1): (Bi1-xMx)NiO3 (1), where M represents at least one metal selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In; and x represents a numerical value of 0.02?x?0.15.

Abstract: Methods employing novel solvents are disclosed for making metal nanostructures including metal nanowires. Such methods can be carried out at lower temperatures and higher production rates than those employing ethylene glycol. The products of these methods are useful for electronics applications.

Abstract: A method to recover gold lost in roaster calcine-leach tailings, due to the formation of cyanide refractory compounds or morphologies during the roasting process. The process can include acid leaching of magnetic concentrate from roaster leach tailings, combining the acid leach slurry to the pre-acidulation tank for pressure oxidation feed, acid pressure oxidation of the pressure oxidation feed, and recovery of gold.

Abstract: A material for providing an electrically conducting contact layer, the material comprising a base material being any one of Ag, Cu, Sn, Ni, a first metal salt of one thereof, or an alloy of one or more thereof. The material further comprises In within a range of 0.01 at. % to 10 at. %, Pd within a range of 0.01 at. % to 10 at. %, and, unless already the base material comprises Sn at a higher amount, Sn within a range of 0.01 at. % to 10 at. %. From such material, a contact layer (6) can be provided that, compared to a coating of only the base material, has improved corrosion resistance and low contact resistance. Also disclosed is: an electrically conducting contact element (2) that comprises a substrate (4) and coated thereon a contact layer (6) comprising the material, a method for providing the contact element (2), and uses of the material as contact layer and target material.

Abstract: A preparation method of silver nanostructure for use as substrate of surface-enhanced Raman scattering (SERS), which can ensure the ‘hot spot’, which provides the considerably very intense electromagnetic field in which the silver nano-structures have uniform average size and very strong forms of particles, by characterizing a variety of conditions such as, for example, concentration of AgNO3 and reductant, reaction temperature, stirring velocity, single dropwise addition quantity, dropwise addition rate, or total dropwise addition quantity, which were unpredictable in the conventional silver nanoparticle preparation method using AgNO3 aqueous solution and NaBH4 reductant, so that the preparation method can be advantageously applied for the mass production of silver nano-structures for use as substrate of SERS because the method can provide multimer form with enhanced SERS signals and reproducibility, and also ability to selectively control the particle size.

Abstract: The invention relates to a method for producing a noble metal/metal layer, which has particularly advantageous tribological properties, comprising the following steps: providing a bath for the currentless deposition of a metal layer, which additionally contains at least one type of noble metal ions; introducing a substrate into the bath; and applying a voltage.

Abstract: It is an object of the present invention to provide a Ag—Pd—Cu—Ge type silver alloy which can form a reflective electrode film having such two characteristics that it is very reduced in the lowering of reflectance caused by thermal deterioration and has resistant to yellowing caused by sulfurization even after a heating step in a process of producing a color liquid crystal display. The silver alloy according to the present invention includes a composition containing at least four elements including Ag as its major component, 0.10 to 2.89 wt % of Pd, 0.10 to 2.89 wt % of Cu and 0.01 to 1.50 wt % of Ge, and the total amount of Pd, Cu and Ge is 0.21 to 3.00 wt %.

Abstract: A bonding wire according to the invention contains a core having a surface, in which the core contains silver as a main component and at least one element selected from gold, palladium, platinum, rhodium, ruthenium, nickel, copper, and iridium. The wire exhibits at least one of the following properties: I. an average size of crystal grains of the core is between 0.8 ?m and 3 ?m, II. the amount of crystal grains having an orientation in the <001> direction in a wire cross section is in a range of 10-20%, III. the amount of crystal grains having an orientation in the <111> direction in a wire cross section is in a range of 5-15%, and IV. the total amount of crystal grains having orientations in the <001> and <111> directions in a wire cross section is in a range of 15-40%.

Abstract: Methods of producing metal nanowires, compositions, and articles are disclosed. Such methods allow production of metal nanowires with reproducibly uniform diameter and length, even in the presence of catalyst concentration variation. Such metal nanowires are useful for electronics applications.

Abstract: Disclosed is a method suitable for large-scale producing silver nanostructures including nanoparticles and nanowires with high crystallization and purity in a short period of time. In this method, silver particles with mean diameter less than 200 nm and silver nanowires with length in micrometers are produced through a microwave-assisted wet chemistry method. Tens to hundreds grams of silver nanoparticles and nanowires are obtained in minutes by microwave irradiation treatment to a precursor pre-made by highly concentrated silver salt solution and other additives. These silver nanoparticles and nanowires have good dispersibility and are ideal for forming conductive adhesives.

Abstract: Titanium sterling silver alloy compositions that exhibit enhanced tarnish resistance while maintaining an acceptable hardness. Applications and manufacturing methods thereof are disclosed.

Abstract: Methods of producing metal nanowires employing tubular continuous-flow reactors and their products are described and claimed. Such methods can provide superior nanowire uniformity without agglomeration. Such nanowires are useful for electronic applications.

Abstract: The present invention provides an aqueous solution-based method for producing nano-sized silver platelets, which employs the controlled mixing of a silver ion solution, a reducing solution, and an acidic solution, under suitable conditions. Also provided are the silver platelets produced thereby, and compositions containing the silver platelets.

Abstract: Provided is a method for producing Ag nanowires, including, heating a precursor solution that includes: an Ag salt; a water-soluble polymer; a surfactant, or a halide of metal ions having a standard reduction potential of ?0.1 to ?0.9V as a metal catalyst; and a reduction solvent, to produce the Ag nanowires. According to this method, a time for synthesizing nanowires may be considerably decreased, and an amount of Ag precursor discarded without reaction may be effectively reduced. As a result, the Ag nanowires may be produced with high efficiency and mass-production thereof through a simple scale-up may be successfully achieved.

Abstract: It is important that the metal particles used in a conductive paste used for wiring have the characteristic of being easily dispersed in a polar solvent in combination with another material such as a resin used in a paste. Provided is a metal particle powder which exhibits a pH value of 6 or less when 0.5 g of the metal particles to be evaluated are added to 100 mL of a potassium hydroxide solution with a pH of 11, and then an aqueous nitric acid solution in an amount in which pH becomes 5 by adding 0.10 mol/L nitric acid to 100 mL of a potassium hydroxide solution and 10 mL of ethyl alcohol (blank solution) with a pH of 11 is added.

Abstract: A brazing alloy for bonding in air contains Ag, B, and Si, as essential components, in which the total of constituent elements except for Ag is set to more than 50% by volume and not more than 90% by volume, Si content in the constituent elements except for Ag is set to more than 22% by volume, and B content in the constituent elements except for Ag is set to more than 14% by volume. In a bonded layer of a bonded specimen of the present invention, after holding at high temperature, no void as observed in a bonded specimen after holding at high temperature of a Comparative Sample is observed, the brazing alloy is sufficiently melted, and superior gas sealing characteristics are maintained even after holding at high temperature for a long time.

Abstract: A metal particle which is a non-nucleated, spherical porous material having continuous open pores, and which is formed from dendritic crystals which have grown uniformly outward from the center without requiring a nucleating agent. A method for producing a metal particle which includes the steps of: mixing a metal salt and a polycarboxylic acid in a liquid phase; adding a reducing agent to the resultant mixture to deposit metal particles; and drying the deposited metal particles. The metal particle produced by the method, which is a non-nucleated, spherical porous material having continuous open pores, is unlikely to suffer bonding or aggregation of the metal particles and exhibits excellent dispersibility, and, when the metal particle is used in a conductive composition, such as a conductive paste, a cured product having satisfactory conduction properties can be obtained at a relatively low temperature, making it possible to easily control the specific gravity or resistance.

Abstract: A silver powder for silver clay, wherein a main component is Ag, and an amount of P is controlled to be 100 ppm or less.

Abstract: Compositions for forming Au-based bulk-solidifying amorphous alloys are provided. The Au-based bulk-solidifying amorphous alloys of the current invention are based on ternary Au—Cu—Si alloys, and the extension of this ternary system to higher order alloys by the addition of one or more alloying elements. Additional substitute elements are also provided, which allow for the tailoring of the physical properties of the Au-base bulk-solidifying amorphous alloys of the current invention.

Abstract: The process for making silver powder particles with small size crystallites uses a combination of gum arabic and maleic acid with the reduction of a silver salt with ascorbic acid. Silver thick film paste containing these silver powder particles can be used in electronic applications to form electrodes for semiconductor devices and, in particular, solar cells.

Abstract: A production method of composite silver nanoparticle including the steps of: arranging at least an alcohol solvent selected from alcohols with a carbon number of 1 to 12 composed of methanol, ethanol, propanol, buthanol, pentanol, hexanol, heptanol, octhanol, nonanol, decanol, undecanol and dodecanol; preparing an alcohol solution by mixing a silver salt into the alcohol solvent added more excessively than the mol number of the silver salt so as to become an excess alcohol solution; heating the excess alcohol solution in a reaction chamber at a generation temperature PT generating an aldehyde for a generation time; forming a silver core through reducing of the silver salt by the alcohol solvent and/or the aldehyde; and forming a composite silver nanoparticle having an organic coating layer originated from the alcohol solvent around the silver core.

Abstract: A bonding wire for semiconductor devices and a method of manufacturing the wire are provided. The bonding wire contains at least one element selected from zinc, tin, and nickel in an amount of 5 ppm to 10 wt %, the remainder containing silver and inevitable impurities. The method involves pouring a silver alloy according to the invention into a mold and melting the silver alloy, continuously casting the melted silver alloy, and drawing the continuously casted silver alloy.

Abstract: There is provided with a silver ink composition which is formed by blending one or more kinds of silver ?-ketocarboxylates selected from the group consisting of silver isobutyrylacetate, silver benzoylacetate, silver propionylacetate, silver acetoacetate, silver ?-methylacetoacetate, and silver ?-ethylacetoacetate, and an aliphatic primary or secondary amine having 1 to 10 carbon atoms, and a substrate with a surface on which a metallic silver layer which is formed by heating the silver ink composition is provided. According to the invention, it is possible to obtain a silver ink composition suitable for forming a metallic silver layer which has superior glossiness and specularity, and a substrate with a surface on which a metallic silver layer is formed using the silver ink composition.

Abstract: A connecting material that includes metallic particles with an oxygen state ratio of less than 15% as measured by X-ray photoelectron spectroscopy and a mean particle size between 0.1 ?m and 50 ?m; and especially a connecting material that includes metallic particles that have been subjected to treatment for removal of a surface oxide film and subjected to surface treatment with a surface protective material, so as to provide a connecting material having a high coefficient of thermal conductivity even when joined at a curing temperature of up to 200° C. without application of a load, and that has sufficient bonding strength even when the cured product has been heated at 260° C.; as well as a semiconductor device employing the connecting material to bond a semiconductor element to a support member.

Abstract: Metal nanowires with high linearity can be produced using metal salts at a relatively low temperature. A transparent conductive film can be formed using the metal nanowires. Particularly, the transparent conductive film has high transmittance, low sheet resistance, and good thermal, chemical and mechanical stability. The transparent conductive film has a high electrical conductivity due to the high linearity of the metal nanowires. The metal nanowires take up 5% or less of the volume of the transparent conductive film, ensuring high transmittance of the transparent conductive film. Furthermore, the metal nanowires are useful as replacements for existing conductive materials, such as ITO, conductive polymers, carbon nanotubes and graphene. The metal nanowires can be applied to flexible substrates and other various substrates due to their good adhesion and high applicability to the substrates. Moreover, the metal nanowires can find application in various fields, such as displays and solar cell devices.

Abstract: The process for making silver powder particles with very small size crystallites uses a combination of gum arabic and maleic acid with the reduction of a silver salt with ascorbic acid. Silver thick film paste containing these silver powder particles can be used in electronic applications to form electrodes for semiconductor devices and, in particular, solar cells.

Abstract: A brazing alloy for bonding in air, in which the melting point is reduced so as to perform brazing at a low temperature without using flux even in air, is provided. In addition, a bonded article and a current collecting material, each of which is bonded with the brazing alloy and has preferable gas sealing characteristics and superior bonding strength, are provided. The brazing alloy for bonding in air includes Ag and B as essential components. The amount of Ag is not less than 50 vol. % and less than 92 vol. %, and the amount of B is greater than 8 vol. % and not more than 50% vol. %. The amounts of Ag and B are adjusted so that the total of the amounts of Ag and B is 100% including inevitable impurities.

Abstract: Processes are disclosed and claimed that allow either purification of nanowire slurries or exchange of liquids in such slurries or both. Such processes avoid the drawbacks of other known methods and are readily scalable to larger production volumes.

Abstract: A porous catalyst layer formed from discrete particles of unsupported metal, wherein at least 80%, suitably at least 90%, of the discrete particles have a mass of from 1 to 1000 zeptograms, and wherein the catalyst layer has a metal volume fraction of less than 30% and a metal loading of less than 0.09 mg/cm2 is disclosed. The catalyst layer is suitable for use in fuel cells and other electrochemical applications.

Abstract: A process for producing silver nanoparticles includes receiving a first mixture comprising a silver salt, an organoamine, a first solvent, and a second solvent; and reacting the first mixture with a reducing agent solution to form organoamine-stabilized silver nanoparticles. The polarity index of the first solvent is less than 3.0, and the polarity index of the second solvent is higher than 3.0. The nanoparticles are more dispersible or soluble in the first solvent.

Abstract: A cold formation method of composite silver nanoparticles has been established. Thus, provided are composite silver nanoparticles comprising a silver core, which is made up of aggregated silver atoms and has an average particle diameter of from 1 to 20 nm, and an organic coating layer formed thereon which comprises at least one member selected from an alcohol molecule derivative having 1 to 12 carbon atoms, an alcohol molecule residue or an alcohol molecule; a composite silver nanopaste which contains at least the composite silver nanoparticles and a solvent and/or a viscosity grant agent added thereto; a method of producing the same; an apparatus for producing the same; a method of bonding the same; and a method of patterning the same.

Abstract: Methods of preparing nanowires, compositions, and articles are disclosed. Such methods can provide thin nanowires with reduced nanoparticle contamination. Compositions and articles comprising such nanowires are useful in electronics applications.

Abstract: Methods employing novel solvents are disclosed for making metal nanostructures including metal nanowires. Such methods can be carried out at lower temperatures and higher production rates than those employing ethylene glycol. The products of these methods are useful for electronics applications.

Abstract: Nanowire preparation methods, compositions, and articles are disclosed. Such methods which reduce metal ions to metal nanowires in the presence of aluminum or gallium ions, are capable of producing long, narrow, nanowires useful for electronics and optical applications.

Abstract: Methods of preparing metal nanowire are disclosed that employ quaternary phosphonium salts. Such processes can produce long and thin nanowires. Compositions and articles comprising such nanowires are useful in electronics applications.

Abstract: Methods of preparing nanowires having small diameters and large lengths are disclosed. Such nanowires are useful in electronics applications.

Abstract: Preparation methods, compositions, and articles useful for electronic and optical applications are disclosed. Such methods reduce metal ions to metal nanowires in the presence of bromide ions, IUPAC Group 14 elements in their +2 oxidation state, and optionally chloride ions. The product nanowires are useful in electronics applications.

Abstract: The instant invention relates to shaped transition metal particles, in particular in the form of a dispersion in an aqueous and/or organic medium, the manufacture thereof and their use as an infrared (IR) absorbing agent, an IR curing agent for coatings, an additive in conductive formulations, an antimicrobial agent or for sensoring organic and/or inorganic compounds. Further, the invention relates to dispersions comprising said shaped particles and an aqueous and/or organic medium, such as a thermoplastic or crosslinkable polymer, as well as to antimicrobial compositions and products.

Abstract: After a reducing agent is added to a water reaction system containing silver ions to deposit silver particles by reduction, the silver particles are dried to obtain a silver powder which is heat-treated at a temperature of higher than 100° C., and lower than 400° C. The silver powder thus heat-treated has a maximum coefficient of thermal expansion of not greater than 1.5% at a temperature of 50° C. to 800° C., and has no heating peak when the silver powder is heated from 50° C. to 800° C. The silver powder has an ignition loss of not greater than 1.0% when the silver powder is ignited until the weight of the silver powder is constant at 800° C. The silver powder has a tap density of not less than 2 g/cm3 and a BET specific surface area of not greater than 5 m2/g.

Abstract: Methods of producing metal nanowires employing tubular continuous-flow reactors and their products are described and claimed. Such methods can provide superior nanowire uniformity without agglomeration. Such nanowires are useful for electronic applications.

Abstract: The present invention relates to an Ag alloy film. Particularly, it is preferably used as a reflective film or semi-transmissive reflective film for an optical information recording medium having high thermal conductivity/high reflectance/high durability in the field of optical information recording media, an electromagnetic-shielding film excellent in Ag aggregation resistance, and an optical reflective film on the back of a reflection type liquid crystal display device, or the like. The Ag alloy film of the present invention comprises an Ag base alloy containing Bi and/or Sb in a total amount of 0.005 to 10% (in terms of at %). Further, the present invention relates to a sputtering target used for the deposition of such an Ag alloy film.

Abstract: Methods of producing metal nanowires, compositions, and articles are disclosed. Such methods allow production of metal nanowires with reproducibly uniform diameter and length, even in the presence of catalyst concentration variation. Such metal nanowires are useful for electronics applications.

Abstract: Methods of producing metal nanowires, compositions, and articles are disclosed. Such methods allow production of metal nanowires with reproducibly uniform diameter and length, even in the presence of catalyst concentration variation. Such metal nanowires are useful for electronics applications.

Abstract: A method and system are provided in which a gold and/or silver-collecting resin-in-leach circuit comprises both co-current and counter-current sections.

Abstract: A method of making silver ribbons is disclosed. A silver salt solution and a reducing agent solution are added to an aqueous dispersing polymer solution to precipitate silver ribbons.

Abstract: Methods of preparing nanowires, and compositions and articles comprising the nanowires are disclosed. Such methods allow tailored synthesis of nanowires based on one or more product geometrical parameters. Such tailored nanowires are useful in electronic applications.

Abstract: Nanomaterial preparation methods, compositions, and articles are disclosed and claimed. Such methods can provide nanomaterials with improved morphologies relative to previous methods. Such materials are useful in electronic applications.

Abstract: Nanomaterial preparation methods, compositions, and articles are disclosed and claimed. Such methods can provide nanomaterials with improved morphologies and reduced nitric oxide co-production relative to previous methods. Such materials are useful in electronic applications.

Abstract: Nanomaterial preparation methods, compositions, and articles are disclosed and claimed. Such methods can provide nanomaterials with improved morphologies relative to previous methods. Such materials are useful in electronic applications.