The present application provides a preparation method for iridium nanocrystal, including the following steps: mixing an iridium salt, an alcohol solvent and a centrifugal waste liquid to form a mixed solution, and adding an alkali solution in an inert atmosphere for a heating reaction. After centrifugation, an iridium nanocrystal is obtained. The centrifugal waste liquid is a waste liquid produced in the pre-synthesis process of iridium nanocrystal. The preparation method can shorten the reaction time, and the obtained iridium nanocrystal has the advantages of high yield and low cost.

A bonding material of a silver paste contains: fine silver particles having an average primary particle diameter of 1 to 200 nm, each of the fine silver particles being coated with an organic compound having a carbon number of not greater than 8, such as sorbic acid; and a solvent mixed with the fine silver particles, wherein a diol, such as an octanediol, is used as the solvent and wherein a triol having a boiling point of 200 to 300 C., a viscosity of 2,000 to 10,000 mPa.Math.s at 20 C. and at least one methyl group, such as 2-methylbutane-2,3,4-triol or 2-methylbutane-1,2,4-triol, is mixed with the solvent as an addition agent.

The present invention relates to a technique for recovering and recycling a platinum paste. The present invention provides a method for recovering a metal powder from a platinum paste formed by mixing a solid component composed of a metal powder including at least a platinum powder or a platinum alloy powder and an organic component including at least an organic solvent, the method including removing the organic component by heating the platinum paste at a recovery temperature set in a temperature range of 300 C. or higher and 500 C. or lower. The recovered metal powder can be recycled into a platinum paste equivalent to a new product by mixing the metal powder with a solvent etc.

The present invention relates to novel gold nanocrystals and nanocrystal shape distributions that have surfaces that are substantially free from organic impurities or films. Specifically, the surfaces are clean relative to the surfaces of gold nanoparticles made using chemical reduction processes that require organic reductants and/or surfactants to grow gold nanoparticles from gold ions in solution. The invention includes novel electrochemical manufacturing apparatuses and techniques for making the gold-based nanocrystals. The invention further includes pharmaceutical compositions thereof and the use of the gold nanocrystals or suspensions or colloids thereof for the treatment or prevention of diseases or conditions for which gold therapy is already known and more generally for conditions resulting from pathological cellular activation, such as inflammatory (including chronic inflammatory) conditions, autoimmune conditions, hypersensitivity reactions and/or cancerous diseases or conditions In one embodiment, the condition is mediated by MIF (macrophage migration inhibiting factor).

The present invention relates to novel gold nanocrystals and nanocrystal shape distributions that have surfaces that are substantially free from organic impurities or films. Specifically, the surfaces are clean relative to the surfaces of gold nanoparticles made using chemical reduction processes that require organic reductants and/or surfactants to grow gold nanoparticles from gold ions in solution. The invention includes novel electrochemical manufacturing apparatuses and techniques for making the gold-based nanocrystals. The invention further includes pharmaceutical compositions thereof and the use of the gold nanocrystals or suspensions or colloids thereof for the treatment or prevention of diseases or conditions for which gold therapy is already known and more generally for conditions resulting from pathological cellular activation, such as inflammatory (including chronic inflammatory) conditions, autoimmune conditions, hypersensitivity reactions and/or cancerous diseases or conditions In one embodiment, the condition is mediated by MIF (macrophage migration inhibiting factor).

A bonding material includes: fine silver particles having an average primary particle diameter of 1 to 50 nm, each of the fine silver particles being coated with an organic compound having a carbon number of not greater than 8, such as hexanoic acid; silver particles having an average primary particle diameter of 0.5 to 4 m each of the silver particles being coated with an organic compound, such as oleic acid; a solvent containing a primary alcohol solvent and a terpene alcohol solvent; and a dispersant containing a phosphoric acid ester dispersant (or a phosphoric acid ester dispersant and an acrylic resin dispersant), wherein the content of the fine silver particles is in the range of from 5 wt % to 30 wt %, and the content of the silver particles is in the range of from 60 wt % to 90 wt %, the total content of the fine silver particles and the silver particles being not less than 90 wt %, and wherein the bonding material further includes a sintering aid of a monocarboxylic acid having an ether bond.

Provided is an instrument including a hydrophilic processed portion on at least a portion of an outer surface thereof. The hydrophilic processed portion contains a hydrophilic polymer and a silver-containing antibacterial agent, and a water contact angle of a surface of the hydrophilic processed portion is equal to or less than 80. Therefore, the instrument has excellent hydrophilicity and antibacterial properties.

A method for producing an active metal paste according to an embodiment includes a premixing process and a kneading process. The premixing process includes producing a mixture by mixing a binder with a metal powder; the metal powder includes copper and an active metal; the binder includes a resin dissolved in an organic solvent; and the mixture includes 60 to 95 mass % of the metal powder. The kneading process includes producing an active metal paste by causing the mixture to rotate and revolve.

An Fe-based amorphous alloy of the present invention has a composition represented by formula (Fe.sub.100-a-b-c-d-eCr.sub.aP.sub.bC.sub.cB.sub.dSi.sub.e (a, b, c, d, and e are in terms of at %), where 0 at %a1.9 at %, 1.7 at %b8.0 at %, 0 at %e1.0 at %, an Fe content (100-a-b-c-d-e) is 77 at % or more, 19 at %b+c+d+e21.1 at %, 0.08b/(b+c+d)0.43, 0.06c/(c+d)0.87, and the Fe-based amorphous alloy has a glass transition temperature (Tg).

Coating processes and coated components are disclosed. A coating process includes applying a suspension to an operationally-used surface, the suspension having one or more solvents, nano-materials, a plasticizer, a binder, and a dispersant suspending nano-materials within the suspension, applying heat to the suspension thereby removing liquids from the suspension, wherein solids are maintained on the surface after the applying of the heat, and sintering the solids on the surface to produce a coating. A coated component includes a substrate and a coating formed on the substrate by sintering of solids, the solids being positioned by application and heating of a suspension to an operationally-used surface, the suspension having one or more solvents, nano-materials, a plasticizer, a binder, and a dispersant suspending nano-materials within the suspension.