Abstract: Disclosed is a silver powder preparation method including a silver salt reduction step. The silver salt reduction step includes a reaction solution preparation step for preparing a first reaction solution and a second reaction solution and a precipitation step for allowing reaction between the first reaction solution and the second reaction solution to precipitate silver particles. The first reaction solution contains silver ions, ammonia, an alkali metal salt of an organic acid, and a phosphorous compound, and the second reaction solution contains a reducing agent. The content of the phosphorous compound and the reaction temperature of the precipitation step are adjusted so that the shrinkage rate of the silver powder is adjusted within a range of 5% to 20% at 500° C. when the reaction temperature is heated to 800° C. at a heating rate of 50° C./min.

Abstract: The present disclosure relates to a silver powder preparation method comprising: a silver powder preparation step of preparing a silver salt, which comprises silver ions, and then reducing the silver ion so as to precipitate silver particles; a silver powder recovery step of separating silver particles from an aqueous solution or a slurry, which comprises the precipitated silver particles, and then washing and drying same to recover silver powder; and a silver powder coating step of injecting a pH adjuster into the recovered silver powder to adjust the pH, and then injecting a coating agent to coat after the pH adjustment. The pH adjuster is used in the silver powder coating step to adjust the pH, and thus, when silver power is used in a conductive paste, as the rate of change in viscosity over time is low, a conductive paste having excellent viscosity stability can be provided.

Abstract: Disclosed is a silver powder preparation method including a silver salt reduction step. The silver salt reduction step includes a reaction solution preparation step for preparing a first reaction solution and a second reaction solution and a precipitation step for allowing reaction between the first reaction solution and the second reaction solution to precipitate silver particles. The first reaction solution contains silver ions, ammonia, an alkali metal salt of an organic acid, and a phosphorous compound, and the second reaction solution contains a reducing agent. The content of the phosphorous compound and the reaction temperature of the precipitation step are adjusted so that the shrinkage rate of the silver powder is adjusted within a range of 5% to 20% at 500° C. when the reaction temperature is heated to 800° C. at a heating rate of 50° C./min.

Abstract: The present application relates to a spherical, porous structure which is formed using a mold taking the form of a spherical nanoparticle aggregate, and relates to a production method therefor. According to one aspect of the present application, the production method for the spherical, porous structure comprises: the use of a mold taking the form of a spherical nanoparticle-carbon precursor aggregate comprising a carbon precursor on the surfaces of a plurality of nanoparticles, formed by removing solvent from droplets comprising the carbon precursor and the plurality of nanoparticles.

Abstract: Provided are a method for fabricating a porous carbon structure using optical interference lithography, and a porous carbon structure fabricated by same, wherein the method for fabricating a porous carbon structure using optical light interference lithography includes: forming a photoresist layer on a substrate; irradiating a three-dimensional optical interference pattern onto the photoresist formed using three-dimensional optical interference lithography to form a three-dimensional porous photoresist pattern; coating the formed three-dimensional porous photoresist pattern with an inorganic material; heating the photoresist pattern on which the inorganic material is coated to carbonize the pattern; and removing the coated inorganic material.

Abstract: The present application relates to a spherical, porous structure which is formed using a mould taking the form of a spherical nanoparticle aggregate, and relates to a production method therefor. According to one aspect of the present application, the production method for the spherical, porous structure comprises: the use of a mould taking the form of a spherical nanoparticle-carbon precursor aggregate comprising a carbon precursor on the surfaces of a plurality of nanoparticles, formed by removing solvent from droplets comprising the carbon precursor and the plurality of nanoparticles.

Abstract: Provided are a method for fabricating a porous carbon structure using optical interference lithography, and a porous carbon structure fabricated by same, wherein the method for fabricating a porous carbon structure using optical light interference lithography includes: forming a photoresist layer on a substrate; irradiating a three-dimensional optical interference pattern onto the photoresist formed using three-dimensional optical interference lithography to form a three-dimensional porous photoresist pattern; coating the formed three-dimensional porous photoresist pattern with an inorganic material; heating the photoresist pattern on which the inorganic material is coated to carbonize the pattern; and removing the coated inorganic material.