Dynamic continuous preparation method of Ti4O7 powder and dynamic continuous sintering device

Abstract

The invention provides a dynamic continuous preparation method of Ti4O7 powder. The dynamic continuous preparation method comprises the following steps: (1) material preparation: computing the weight percents of raw materials including TiO2 powder and reducing agents according to the chemical formula of the Ti4O7 powder and chemical reaction between the used raw materials; (2) material mixing and drying; (3) sintering: heating furnace tubes in a sloping state in which discharge holes of the furnace tubes are lower than feeding holes of the furnace tubes and in a rotating state of the furnace tubes in an open system or a closed system or under negative pressure, continuously feeding the mixed powder obtained in the step (2) into the furnace tubes when the temperatures in the furnace tubes reach the reaction temperature, enabling the mixed powder to pass through heating zones of the furnace tubes in a form of screw motion after the mixed powder enters the furnace tubes to complete reaction to form a reaction product, enabling the reaction product to fall into a collecting chamber, and cooling the reaction product, thus obtaining the Ti4O7 powder. A dynamic continuous sintering device used in the method comprises a material storage chamber, a screw feeder, the furnace tubes, a furnace tube driving mechanism, a heating furnace, the collecting chamber, a support frame, a threaded lifter and a bracket.

Description

technical field [0001] The invention belongs to Ti 4 o 7 The technical field of powder preparation, in particular to a kind of Ti 4 o 7 A dynamic continuous preparation method and a sintering device for powder. Background technique [0002] Ti 4 o 7 It is a single-phase titanium black. Its most prominent physical property is its excellent electrical conductivity at room temperature, and its single-crystal electrical conductivity can reach 1500 S / cm. Although usually prepared Ti 4 o 7 As a polycrystalline material, the conductivity cannot reach that of a single crystal, but it is still better than graphite. At the same time Ti 4 o 7 It has very remarkable thermal stability, chemical stability and corrosion resistance, and can exist stably in strong acid and strong alkali environment. These properties effectively overcome the defects of existing commonly used industrial electrode materials. Therefore Ti 4 o 7 It can be widely used as electrode material and conduct...

AI Technical Summary

Problems solved by technology

Due to uneven heating, each layer of product is greatly affected by temperature, and it is difficult to obtain Ti with a single phase composition. 4 o 7 powder, the resulting product is Ti 4 o 7 、Ti 5 o 9 、Ti 3 o 5 The mixed phase seriously affects its electrochemical performance and limits its wide application.

[0004] Chinese patent ZL201210122956.X discloses "a nano-Ti 4 o 7 Powder preparation method", using highly active nano-TiO 2 , nano-carbon black and aromatic aldehydes as raw materials to improve reaction kinetics, promote carbothermal reduction process, through vacuum or flow atmosphere, although a small amount of single-phase nano-Ti can be prepared in the laboratory 4 o 7 powder, but using vacuum sintering furnace or carbon tube furnace equipment, the preparation process is an intermittent operation, the output and efficiency are not high, and it is difficult to ensure the uniformity of the temperature of the material in the furnace during the reaction process when the amount of material is large, resulting in impurity in the product phase , and not easy to mass-produce

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