Push-type dynamic continuous preparation method and sintering device for titanium black powder

Abstract

The invention provides a push-type dynamic continuous preparation method for titanium black powder. The titanium black powder is TiO powder, Ti3O5 powder, Ti4O7 powder, Ti5O9 powder, Ti6O11 powder, Ti7O13 powder, Ti8O15 powder or Ti9O17 powder. The push-type dynamic continuous preparation method comprises the following steps: (1) preparing raw materials; (2) mixing and drying; (3) sintering: introducing reducing gas or / and inert gas into a cooling chamber, a reaction chamber and a preheating chamber with the gas flow of 0.1-3 L / min, heating to enable the temperature of the preheating chamber to be a preheating temperature, heating to enable the temperature of the reaction chamber to be a reaction temperature to enable the reaction chamber to be in a working condition, successively feeding reaction boats loaded with the mixed powder at certain time intervals into a feeding chamber, and successively pushing the reaction boats to a discharging opening direction at a constant speed. The invention further provides a push-type dynamic continuous sintering device. Through the adoption of the preparation method and the sintering device, titanium black powder of which the purity is higher than 70% can be obtained, and continuous mass production can be realized.

Description

technical field [0001] The invention belongs to the technical field of titanium oxide powder preparation, and in particular relates to a dynamic preparation method and a sintering device for titanium oxide powder. Background technique [0002] Titanium oxide has a rutile-based TiO 2 The structure of the lattice, its several different titanium oxide compounds have high electrical conductivity, and at the same time, the chemical stability is extremely high, and they have good light absorption ability in the visible light region or ultraviolet light region, which makes it a On the one hand, it can be an excellent electrode material and electrochemical catalyst carrier material for electrochemical applications, and on the other hand, it is also a very promising material for improving light absorption performance and photoelectrochemical performance. Ti 6 o 11 It is due to the polarization of the insulator generated by the electron-lattice coupling, which has antiferromagnetis...

AI Technical Summary

Problems solved by technology

Due to uneven heat transfer, the temperature field of the material is uneven, and the upper and lower layer products are greatly affected by the temperature

At the same time, the raw material is easy to absorb water and it is difficult to dry completely. The adsorbed water will volatilize to generate water vapor during the high temperature reaction. In addition, the reaction itself will generate water vapor and CO in a reducing atmosphere. 2 Gases, which are not exhausted in time in conventional furnaces, hindering the reaction rate and causing inhomogeneous reactions

In addition, due to process defects, the product is easily absorbed by the trace amount of O contained in the environment when it is cooled. 2 oxidation

These factors lead to the final product being a mixed phase of different substances, and it is difficult to obtain high-quality single-phase titanium dioxide powder with a purity higher than 70%, which seriously affects its performance and limits its wide application.

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