Metal oxide particle production method and production device

摘要

An object of the present invention is to provide a method for producing metal oxide particles, in which metal oxide particles with high photocatalytic activity is produced, and a production apparatus therefor. The above object can be achieved by using a method for producing metal oxide particles, which includes subjecting a reaction gas containing metal chloride and an oxidizing gas containing no metal chloride in a reaction tube (11) to preheating, and then subjecting a combined gas composed of the reaction gas and the oxidizing gas to main heating in a main heating region (A) apart from the downstream side of the junction (5b), wherein the time until the combined gas from the junction (5b) arrives at the upstream end (A1) of the main heating region (A) is adjusted to be less than 25 milliseconds.

主权项

1. A method for producing metal oxide particles, which comprises subjecting a reaction gas containing metal chloride and an oxidizing gas containing no metal chloride in a reaction tube to preheating, and then subjecting a combined gas composed of the reaction gas and the oxidizing gas to main heating in a main heating region apart from the downstream side of the junction, wherein
the time until the combined gas from the junction arrives at the upstream end of the main heating region through a middle region, at which no heating device is provided, is adjusted to be 8 milliseconds to less than 25 milliseconds, wherein at least one of a light shield plate and a heat shield plate is provided outside the reaction tube at the middle region.