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Laser heat source metal oxide deoxidation method

A technology for oxides and oxide powders, applied in the metallurgical field, can solve the problems of unsuitable external environment use, difficult to obtain, etc., and achieve the effects of reducing construction and maintenance costs, good technical applicability, and high degree of automation.

Pending Publication Date: 2020-07-10
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the key material of this technology, the inert anode material, will be continuously consumed in the process, and it is difficult to obtain on the surface of the moon. It needs to be transported from the earth and is not suitable for use in an extraterrestrial environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The experimental raw material used is analytically pure titanium dioxide, in which TiO 2 ≥98%, Fe≤0.01%, Pb≤0.005, As≤0.0007, the rest is water & hydrochloric acid soluble;

[0043] After mixing the oxide into a certain binder, press molding, sintering, and finally obtain a cylindrical sample with a diameter of 20mm and a length of 20mm;

[0044] Place the sample column in the copper crucible in the vacuum chamber, adjust the sample stage where the copper crucible is placed, so that the selected ablation point on the upper surface of the sample is at the focal point of the laser, and set a water-cooled copper tube 10mm directly above the ablation point of the sample. chip collector.

[0045] In this example, a high-power laser is used, and the laser power can be adjusted between 50-2000W. The laser emits light from directly above the sample. After the laser exits, a focusing lens is used to focus the beam and irradiate the selected area on the upper surface of the sam...

Embodiment 2

[0053] Method is with embodiment 1, and difference is:

[0054] (1) The laser power is 1000W, the radius of the laser ablation point is 0.58mm, and the power density under the corresponding experimental conditions is: 4.06×10 5 W / cm 2 ;

[0055] (2) The amount of defocus is 15 mm overfocus, that is, compared to the situation in which the ablation point on the upper surface of the sample is located at the laser focus position in Example 1 above, in this example, the sample platform is moved downward so that the ablation point on the upper surface of the sample is at 15mm below the laser focus;

[0056] The elemental analysis of the product collected by the water-cooled copper plate collector is carried out, and the elemental analysis of the product is carried out by X-ray energy spectrum analysis (EDS). The local atomic percentage of the collected product is: Ti 66.75%, O 33.25%, and the result shows the oxygen element percentage Reduced to obtain subvalent oxide products. ...

Embodiment 3

[0058] Method is with embodiment 1, and difference is:

[0059] (1) Argon gas with a pressure of 0.2 MPa is passed into the vacuum container, and ablation is carried out with argon gas as the protective atmosphere;

[0060] (2) The degree of vacuum is 3.0×10 -2 Pa;

[0061] The elemental analysis of the product was carried out by EDS. The local atomic percentage of the product collected by the water-cooled copper plate was: Ti94.27%, O2.33%, and the results showed that the percentage of oxygen element decreased.

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Abstract

The invention discloses a metal oxide deoxidation method taking laser as a heat source. The metal oxide deoxidation method comprises the following steps: (1) sintering metal oxide powder by adding a binder or directly pressing or mixing and pressing with other functional materials to obtain a raw material column; (2) placing the raw material column on a workbench in a vacuum bin, wherein the workbench is provided with a collecting device; (3) vacuumizing the vacuum bin, starting the laser, ablating the raw material column by the laser, heating and evaporating the raw material column, and carrying out a thermal decomposition reaction to generate corresponding low-valence oxide or metal and oxygen; (4) collecting low-valence metal oxide or metal by a collecting device; and (5) collecting thegenerated oxygen in a lead-out manner.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a metal oxide deoxidation method using laser as a heat source. Background technique [0002] Space is a huge treasure trove of mineral resources. Celestial bodies such as the moon, Mars, and asteroids contain many mineral resources that are scarce on the earth. Outer space resources are of great significance to the sustainable development of mankind. Taking the moon as an example, the moon is rich in mineral resources and energy resources. Harnessing such resources required the development of a new metallurgical technology. This technology can use the moon's abundant titanium, aluminum, silicon and other oxide ore resources as raw materials, use high vacuum as the storage and production environment, and use solar energy resources as energy supply to achieve deoxidation of lunar oxides to produce oxygen and more Inexpensive oxides and even metals. The prepared subvalent oxi...

Claims

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Application Information

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IPC IPC(8): C01G23/047C01G23/04C22B5/02C22B34/12C22B26/20C22B26/22C22B21/00
CPCC01G23/047C01G23/043C22B5/02C22B34/1263C22B26/22C22B26/20C22B21/0053
Inventor 李光石鲁雄刚车浪王彬朱洪斌张永合
Owner SHANGHAI UNIV
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