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Method for preparing spherical TinO(2n-1) from plasma

A technology of titanium dioxide and plasma, which is applied in the field of plasma preparation of spherical titanium dioxide, can solve the problems of long process flow and achieve the effects of good product uniformity, less agglomeration and fast preparation speed

Active Publication Date: 2017-12-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The relatively pure single-phase titanium dioxide that can be obtained by the inventive method, but its reduction time needs 2 to 8 hours, and the process flow is long

Method used

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  • Method for preparing spherical TinO(2n-1) from plasma
  • Method for preparing spherical TinO(2n-1) from plasma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: A method for preparing spherical titanium dioxide by plasma: pass the titanium dioxide powder through a 200-mesh sieve, take the under-sieve, and then transport it to a high-temperature plasma reactor through a carrier gas (the carrier gas is argon) In the high-temperature plasma flame area, under the carrier gas (argon) atmosphere, the titanium dioxide powder undergoes a reduction reaction, and then is driven by the gas to settle through the condensation zone of the cooling device to obtain spherical titanium dioxide powder (Ti n o 2n-1 , 3≤n≤10); wherein the titanium dioxide powder is rutile, the flow rate of the carrier gas (argon) is 5L / min, and the ion excitation gas of the high temperature plasma reactor is argon;

[0016] The obtained spherical titanium oxide powder (Ti n o 2n-1 , 3≤n≤10) is blue titanium dioxide powder with a particle size of 30~150μm.

Embodiment 2

[0017] Example 2: A method for preparing spherical titanium dioxide by plasma: pass the titanium dioxide powder through a 300-mesh sieve, get its undersize, and then pass the carrier gas (the carrier gas is a mixture of argon and hydrogen, argon and The volume ratio of hydrogen (1:1) is transported to the high-temperature plasma flame area in the high-temperature plasma reactor. Under the atmosphere of carrier gas (a mixture of argon and hydrogen), the titanium dioxide powder undergoes a reduction reaction, and then driven by the gas After passing through the condensation zone of the cooling device, the spherical titanium dioxide powder (Ti n o 2n-1 , 3≤n≤10); wherein the titanium dioxide powder is anatase, the flow rate of the carrier gas (a mixture of argon and hydrogen) is 0.5L / min, and the ion excitation gas of the high temperature plasma reactor is argon and hydrogen the gas mixture;

[0018] The obtained spherical titanium oxide powder (Ti n o 2n-1 , 3≤n≤10) is a dar...

Embodiment 3

[0019] Example 3: A method for preparing spherical titanium dioxide by plasma: pass the titanium dioxide powder through a 400-mesh sieve, take the under-sieve, and then transport it to a high-temperature plasma reactor through a carrier gas (the carrier gas is hydrogen) In the high-temperature plasma flame area, under the carrier gas (hydrogen) atmosphere, the titanium dioxide powder undergoes a reduction reaction, and then is driven by the gas to settle through the condensation zone of the cooling device to obtain spherical titanium dioxide powder (Ti n o 2n-1 , 3≤n≤10); wherein the titanium dioxide powder is rutile type, the flow rate of the carrier gas (hydrogen gas) is 1.0L / min, and the ion excitation gas of the high temperature plasma reactor is hydrogen gas;

[0020] The obtained spherical titanium oxide powder (Ti n o 2n-1 , 3≤n≤10) is a dark black titanium oxide powder with a particle size of 10-50 μm. The titanium oxide powder obtained in this example (Ti n o 2n-1...

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Abstract

The invention discloses a method for preparing spherical TinO(2n-1) from plasma and belongs to the technical field of preparation of powdery materials. According to the method, TiO2 powder is conveyed into a plasma flame area in a high-temperature plasma reactor through carrier gas, loses oxygen in the carrier gas atmosphere and is settled in a condensing area, and spherical TinO(2n-1) powder is obtained. Rapid preparation of TinO(2n-1) can be realized with the method, the technical process is short, and continuous production can be realized.

Description

technical field [0001] The invention relates to a method for preparing spherical titanium oxide by plasma, and belongs to the technical field of powder material preparation. Background technique [0002] Titanium oxide is an important titanium oxide material. At present, researchers are applying the prepared titania nanomaterials to the fields of photocatalysis, photoelectrochemical sensors, catalysts, rechargeable lithium-ion battery materials, fuel cells, and microwave absorption. Nano titanium suboxide powder has different physical and chemical properties. [0003] At present, titanium dioxide powder is mainly prepared by titanium dioxide reduction method, using hydrogen, carbon black, metal titanium and carbon monoxide and other reducing agents, heating to a certain temperature in a vacuum or an inert gas atmosphere and keeping it for a certain period of time to reduce titanium dioxide to prepare the required powder samples. Because these processes are time-consuming a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/04
CPCC01G23/043C01P2004/32C01P2004/03C01P2004/61C01P2004/60
Inventor 徐宝强赵顶杨斌邓勇杨佳马文会刘大春郁青春李一夫田阳蒋文龙熊恒曲涛戴永年
Owner KUNMING UNIV OF SCI & TECH
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