Abstract: A graphite electrode includes a pole having a socket in an internal screw shape at an end portion, and a nipple in an external screw shape that can be fastened to the socket, wherein a value obtained by subtracting an effective diameter on a small diameter end side of the nipple from an effective diameter on a small diameter end side of the socket is 0.05 to 0.7 mm, and a value obtained by subtracting a taper angle of the socket from a taper angle of the nipple is ?2 minutes to ?3 minutes 30 seconds.

Abstract: A carbon black wherein a nitrogen adsorption specific surface area (N2SA) is 25 to 60 m2/g, a DBP absorption number is 90 to 180 cm3/100 g, a ratio of the nitrogen adsorption specific surface area (N2SA) to an iodine adsorption number (IA) (N2SA/IA) is 1.10×103 to 1.50×103 m2/g, a hydrogen content by NMR is 150 to 250 /g, and ?D is 260 to 290 cm?1.

Abstract: A negative electrode material for a lithium-ion secondary battery is disclosed which contains a mass of graphite particle spherical aggregates in which a plurality of flat graphite particles are aggregated. The mass of the graphite particle spherical aggregates has an average circularity, D90/D10, and a crystallite size Lc (004) within a predetermined range, and the proportion of the graphite particle spherical aggregates in which the largest flat graphite particle observed on the outermost surface has a circle equivalent diameter of 2 ?m to 12 ?m in graphite particle spherical aggregates having a circle equivalent diameter of 10 ?m or more when observed by SEM is 80% or more.

Abstract: The present invention provides a sintered metal friction material that has excellent wear resistance, heat resistance even at high load and has a higher friction coefficient while maintaining a friction coefficient and wear resistance that are hard to decrease, and has a reduced content of copper of less than 5 mass %. There is provided a sintered metal friction material characterized in that the sintered metal friction material comprises a sintered material of a friction material composition, the friction material composition comprises matrix metals and a friction modifier, the matrix metals comprise following 20 to 40 mass % of iron powder, 20 to 40 mass % of nickel powder, 0.5 to 10 mass % of zinc powder, 0.5 to 5 mass, of tin powder, 0.5 to 4 mass % of copper powder and 0.5 to 5 mass % of sintering assist powder.

Abstract: A carbon black is disclosed which can exert excellent abrasion resistance while suppressing heat generation when incorporated into a rubber composition. A carbon black in which the total number of active sites represented by a product of a full width at half maximum of a Raman scattering peak appearing in a range of 1340 to 1360 cm?1 when an excitation wavelength is 532 nm and a specific surface area when nitrogen gas is adsorbed is 3.60×104 to 8.20×104 (cm?1·m2/g), and when a nuclear magnetic resonance signal of a spin-spin relaxation process observed by a solid echo method is represented by a sum of a first signal and a second signal having a time constant larger than that of the first signal, an amount of hydrogen represented by a signal intensity per unit mass at time 0 of the first signal is 50.0 to 250.0 (/g).

Abstract: It is intended to provide a carbon black which can confer reinforcing properties and low exothermicity, which are usually incompatible, as well as excellent abrasion resistance, when mixed with a rubber component, and is suitable for tire tread rubber that is used particularly under severe driving conditions. The present invention provides a carbon black having surface free energy ?d of 50 to 200 mJ/m2 determined by a reverse-phase gas chromatography analysis method and a strongly acidic group concentration of 0 to 0.115 ?mol/m2.

Abstract: Provided is a method for easily producing an oxidized carbon black aqueous dispersion that can highly remove multivalent metal ions and exhibit excellent dispersion stability. A method for producing an oxidized carbon black aqueous dispersion by successively performing on an aqueous slurry of oxidized carbon black having one or more anionic functional groups on a surface thereof a neutralization step of mixing an alkali metal hydroxide and performing heating/neutralization in the presence of one or more selected from a water-soluble chelating agent and a salt thereof or after mixing an alkali metal hydroxide and performing heating/neutralization, mixing one or more selected from a water-soluble chelating agent and a salt thereof and a separation and removal step of separating and removing a multivalent metal ion chelate complex from a mixed solution obtained at the neutralization step using a separation membrane.

Abstract: The present invention provides a sintered metal friction material that has excellent wear resistance, heat resistance even at high load and has a higher friction coefficient while maintaining a friction coefficient and wear resistance that are hard to decrease, and has a reduced content of copper of less than 5 mass %. There is provided a sintered metal friction material characterized in that the sintered metal friction material comprises a sintered material of a friction material composition, the friction material composition comprises matrix metals and a friction modifier, the matrix metals comprise following 20 to 40 mass % of iron powder, 20 to 40 mass % of nickel powder, 0.5 to 10 mass % of zinc powder, 0.5 to 5 mass, of tin powder, 0.5 to 4 mass % of copper powder and 0.5 to 5 mass % of sintering assist powder.

Abstract: A negative electrode material for a lithium-ion secondary battery is disclosed which contains a mass of graphite particle spherical aggregates in which a plurality of flat graphite particles are aggregated. The mass of the graphite particle spherical aggregates has an average circularity, D90/D10, and a crystallite size Lc (004) within a predetermined range, and the proportion of the graphite particle spherical aggregates in which the largest flat graphite particle observed on the outermost surface has a circle equivalent diameter of 2 ?m to 12 ?m in graphite particle spherical aggregates having a circle equivalent diameter of 10 ?m or more when observed by SEM is 80% or more.

Abstract: It is intended to provide a carbon black which can confer reinforcing properties and low exothermicity, which are usually incompatible, as well as excellent abrasion resistance, when mixed with a rubber component, and is suitable for tire tread rubber that is used particularly under severe driving conditions. The present invention provides a carbon black having surface free energy ?d of 50 to 200 mJ/m2 determined by a reverse-phase gas chromatography analysis method and a strongly acidic group concentration of 0 to 0.115 ?mol/m2.

Abstract: A method for easily producing a graphite powder for use as a lithium secondary battery negative electrode material with small specific surface area while reducing energy consumption, and achieving high graphitization efficiency, includes melt-mixing a coke powder and a carbon precursor binder so that an amount of fixed carbon included in the carbon precursor binder is 5 to 15 parts by mass based on 100 parts by mass of the coke powder, to prepare a mixture, and pressing the mixture to prepare a compact, the coke powder being obtained by heating a green coke powder at 600 to 1450° C. in a non-oxidizing atmosphere, the green coke powder having a cumulative particle size at 50% in a volumetric cumulative particle size distribution of 5 to 50 ?m; heating the compact in a non-oxidizing atmosphere to effect carbonization and graphitization to obtain a graphitized compact; and grinding the graphitized compact.

Abstract: A CVD-SiC formed body has low light transmittance and high resistivity, and may suitably be used as a member for an etcher that is used for a semiconductor production process, for example. The SiC formed body is formed using a CVD method, and includes 1 to 30 mass ppm of boron atoms, and more than 100 mass ppm and 1000 mass ppm or less of nitrogen atoms. The SiC formed body preferably has a resistivity of more than 10 ?·cm and 100,000 ?·cm or less, and a light transmittance at a wavelength of 950 nm of 0 to 1%.

Abstract: Carbon black is used as a component of a rubber composition, ensures that the resulting rubber exhibits improved processability, is reinforced in an improved manner, and exhibits low heat buildup, and may suitably be used for a rubber member (e.g., tire tread) and the like for which high abrasion resistance is required. The carbon black includes primary particles having an average particle size of 15 to 35 nm, and forms aggregates having a Stokes mode diameter measured using a centrifugal sedimentation method of 140 to 180 nm, and having a spherical shape when observed using a transmission electron microscope.

Abstract: Provided is a method for conveniently producing a water dispersion of oxidized carbon black particles that exhibits excellent dispersibility and storage stability, in the case of producing a water dispersion of oxidized carbon black particles by liquid-phase oxidation of carbon black particles using a persulfate. In the method for producing a water dispersion of oxidized carbon black particles by bringing at least one persulfate and carbon black particles into contact to perform liquid-phase oxidation, in the presence of an inorganic alkali in an amount equal to or greater than an amount theoretically necessary for neutralizing an acidic product produced by the liquid-phase oxidation, the persulfate and the carbon black particles are brought into contact in water and subjected to liquid-phase oxidation treatment while being heated.

Abstract: Provided is a method for easily producing an oxidized carbon black aqueous dispersion that can highly remove multivalent metal ions and exhibit excellent dispersion stability. A method for producing an oxidized carbon black aqueous dispersion by successively performing on an aqueous slurry of oxidized carbon black having one or more anionic functional groups on a surface thereof a neutralization step of mixing an alkali metal hydroxide and performing heating/neutralization in the presence of one or more selected from a water-soluble chelating agent and a salt thereof or after mixing an alkali metal hydroxide and performing heating/neutralization, mixing one or more selected from a water-soluble chelating agent and a salt thereof and a separation and removal step of separating and removing a multivalent metal ion chelate complex from a mixed solution obtained at the neutralization step using a separation membrane.

Abstract: A novel carbon black can improve rubber properties (e.g., degree of reinforcement and heat buildup). The carbon black has an aggregate void modal diameter Dmp determined by mercury porosimetry of 25 to 60 nm, and has a ratio (?Dmp/modal diameter Dmp) of a half-width ?Dmp of an aggregate void diameter distribution determined by mercury porosimetry to the aggregate void modal diameter Dmp of 0.30 to 0.56.

Abstract: Semiconductor processing and equipment are disclosed. The semiconductor equipment and processing provide semiconductor wafers with reduced defects.

Abstract: Carbon black is used as a component of a rubber composition, ensures that the resulting rubber exhibits improved processability, is reinforced in an improved manner, and exhibits low heat buildup, and may suitably be used for a rubber member (e.g., tire tread) and the like for which high abrasion resistance is required. The carbon black includes primary particles having an average particle size of 15 to 35 nm, and forms aggregates having a Stokes mode diameter measured using a centrifugal sedimentation method of 140 to 180 nm, and having a spherical shape when observed using a transmission electron microscope.

Abstract: Carbon black includes primary particles having an average particle size of 15 to 40 nm, microprotrusions having an average length of 2 to 10 nm being formed on a surface of the primary particles. A method for producing carbon black includes introducing an oxygen-containing gas and fuel into a fuel combustion zone, mixing and combusting the oxygen-containing gas and the fuel to produce a high-temperature combusted gas stream, introducing a raw material hydrocarbon in a first stage of a raw material introduction zone and introducing the raw material hydrocarbon and an oxygen-containing gas in a second stage of the raw material introduction zone while introducing the high-temperature combusted gas stream into the raw material introduction zone to produce a carbon black-containing gas which is introduced into a reaction termination zone while spraying a coolant.

Abstract: A method for easily producing a graphite powder for use as a lithium secondary battery negative electrode material with small specific surface area while reducing energy consumption, and achieving high graphitization efficiency, includes melt-mixing a coke powder and a carbon precursor binder so that an amount of fixed carbon included in the carbon precursor binder is 5 to 15 parts by mass based on 100 parts by mass of the coke powder, to prepare a mixture, and pressing the mixture to prepare a compact, the coke powder being obtained by heating a green coke powder at 600 to 1450° C. in a non-oxidizing atmosphere, the green coke powder having a cumulative particle size at 50% in a volumetric cumulative particle size distribution of 5 to 50 ?m; heating the compact in a non-oxidizing atmosphere to effect carbonization and graphitization to obtain a graphitized compact; and grinding the graphitized compact.