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

A titanium dioxide, push-type technology, applied in the field of dynamic preparation method and sintering device of titanium dioxide powder, can solve the problems that the temperature of the upper and lower layers of the product is greatly affected, affects the performance, hinders the reaction speed, etc.

Active Publication Date: 2015-09-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The structure of the push-type dynamic continuous sintering device in this embodiment is as follows figure 1 , figure 2 As shown, the feeding chamber 2, the preheating chamber 4, the reaction chamber 10, the heat insulation chamber 13, the cooling chamber 15, and the reaction boat 8 loaded with raw material powders and reaction products are sequentially connected and communicated to push the push rod for the movement of the reaction boat. 1. The driving mechanism that can make the push rod do reciprocating linear motion is composed of the supporting frame 13 supporting the feeding chamber 2, the preheating chamber 4, the reaction chamber 10, the heat insulation chamber 13, the cooling chamber 15 and the driving mechanism;

[0064]The top of the feeding chamber 2 is provided with a feeding port and is equipped with a cover plate 3 covering the feeding port, and the end of the feeding chamber is provided with a push rod inlet and outlet hole; the wall of the preheating c...

Embodiment 2

[0077] In this embodiment, the difference between the push-type dynamic continuous sintering device and the sintering device described in Embodiment 1 is that the length L1 of the preheating chamber 4 is 1 m, the length L2 of the reaction chamber 10 is 1 m, and the length L3 of the cooling chamber 15 is 1 m, and the length L4 of the heat insulation chamber 13 is 0.6 m; the heat insulation board is made of graphite.

[0078] In this embodiment, the push-type dynamic continuous preparation method of titanium dioxide powder is as follows:

[0079] (1) Ingredients

[0080] Raw material is H 2 TiO 3 Powder, reducing agent, according to Ti 9 o 17 The chemical formula of the powder and the chemical reaction between the raw materials used are used to calculate the molar percentage of each raw material;

[0081] h 2 TiO 3 Powder: (nano charcoal powder + titanium hydride powder) = 9:1.5.

[0082] (2) mixing and drying (with embodiment 1)

[0083] (3) Sintering

[0084] The ope...

Embodiment 3

[0088] In this embodiment, the push type dynamic continuous sintering device differs from the sintering device described in Embodiment 1 in that the length L1 of the preheating chamber is 1 m, the length L2 of the reaction chamber is 2 m, and the length L3 of the condensation chamber is 1 m. The thermal devices of the preheating chamber and the reaction chamber are induction heating devices.

[0089] In the present embodiment, the preparation method of titanium oxide powder is as follows:

[0090] (1) Ingredients

[0091] The raw material is nano TiO 2 Powder, reducing agent, according to Ti 9 o 17 The chemical formula of the powder and the chemical reaction between the raw materials used are used to calculate the molar ratio of each raw material;

[0092] Nano-TiO 2 Powder: nano carbon black powder = 9:0.8.

[0093] (2) mixing and drying (with embodiment 1)

[0094] (3) Sintering

[0095] The operation method of this step is identical with step (3) in embodiment 1, an...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/04
Inventor 刘颖叶金文李小磊
Owner SICHUAN UNIV
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