A titanium base alloy powder is formed by subsurface reduction of a chloride vapor with a molten alkali metal or molten alkaline earth metal to form reaction products comprising pre-alloy particles and a salt of the alkali metal or the alkaline earth metal. A majority of the pre-alloy particles have a composition of at least 50% by weight of titanium, about 5.38% to 6.95% by weight of aluminum, and about 3% to 5% by weight of vanadium. The pre-alloy particles are recovered from the reaction products to produce a titanium base alloy powder containing less than about 200 ppm alkali or alkaline earth metal.

A method for synthesizing nanoparticles includes aerosolizing a precursor solution in the presence of a flowing carrier gas to yield a reactant stream, the precursor solution comprising a volatile solvent and a nanoparticle precursor. The method further includes heating the reactant stream to a temperature above a boiling point of the volatile solvent to form a product stream comprising a plurality of nanoparticles, cooling the product stream, and passing the product stream through a collection liquid to collect the nanoparticles from the product stream.

Provided is a method and apparatus for producing inorganic powder using chemical vapor synthesis (CVS), the method and apparatus being capable of increasing a production yield by suppressing side reactions and of increasing continuous process stability by preventing reactor blockage, and the method includes supplying a precursor, supplying a side reaction prevention gas capable of preventing side reactions of the precursor, to the precursor, supplying a reaction gas to the precursor, and forming inorganic powder due to a chemical reaction between the precursor and the reaction gas.

Provided is a method and apparatus for producing inorganic powder using chemical vapor synthesis (CVS), the method and apparatus being capable of increasing a production yield by suppressing side reactions and of increasing continuous process stability by preventing reactor blockage, and the method includes supplying a precursor, supplying a side reaction prevention gas capable of preventing side reactions of the precursor, to the precursor, supplying a reaction gas to the precursor, and forming inorganic powder due to a chemical reaction between the precursor and the reaction gas.

A metal powder in which 99.5 mass % or more of the metal component is Ni, the ratio of metal particles having the ratio S/D.sub.PV of the minor axis S of the metal particles to the equal volume sphere equivalent diameter D.sub.PV of the metal particles is 0.92 or less and the ratio D.sub.PV/D.sub.PV50 of the equal volume sphere equivalent diameter D.sub.PV to the volume-based median diameter D.sub.PV50 is 1.8 or more is 1.0 vol % or less, and the volume-based median diameter D.sub.PV50 of the metal particles is 0.08 to 0.35 m. Furthermore, the S content per a specific surface area of 1 m.sup.2/g is preferably 70 to 600 ppm, and similarly, the O content is preferably 1200 to 7000 ppm.

A metal powder in which 99.5 mass % or more of the metal component is Ni, the ratio of metal particles having the ratio S/D.sub.PV of the minor axis S of the metal particles to the equal volume sphere equivalent diameter D.sub.PV of the metal particles is 0.92 or less and the ratio D.sub.PV/D.sub.PV50 of the equal volume sphere equivalent diameter D.sub.PV to the volume-based median diameter D.sub.PV50 is 1.8 or more is 1.0 vol % or less, and the volume-based median diameter D.sub.PV50 of the metal particles is 0.08 to 0.35 m. Furthermore, the S content per a specific surface area of 1 m.sup.2/g is preferably 70 to 600 ppm, and similarly, the O content is preferably 1200 to 7000 ppm.