Titanium based cathode material with uniform and dense TiB2 layer and preparation method of titanium based cathode material

A cathode material and dense technology, applied in the direction of coating, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems that the service life is difficult to meet the requirements, the titanium substrate is easy to be corroded, and boronizing cannot be realized, so as to eliminate the coating The problem of falling off, avoiding corrosion, and the effect of increasing thickness

Active Publication Date: 2019-04-30
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, TiB for aluminum electrolysis cathode obtained directly by boronizing titanium substrate 2 -TiB on the top layer of TiB/Ti gradient composite 2 The layer is uneven, not dense, and even partially fails to achieve t

Method used

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  • Titanium based cathode material with uniform and dense TiB2 layer and preparation method of titanium based cathode material
  • Titanium based cathode material with uniform and dense TiB2 layer and preparation method of titanium based cathode material
  • Titanium based cathode material with uniform and dense TiB2 layer and preparation method of titanium based cathode material

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Example Embodiment

[0023] Example 1

[0024] (1) Perform boronizing treatment on the titanium matrix whose surface has been cleaned. The electrolyte composition and mass fraction are 70% anhydrous borax, 15% anhydrous potassium carbonate and 15% B 4 C. Take graphite crucible as anode, metal titanium plate as cathode, and control the cathode current density to 100mA / cm 2 , The temperature of the molten salt electrolyte is 850℃, and the power is applied for 5 hours to obtain TiB 2 -TiB / Ti gradient composite material;

[0025] (2) The TiB obtained in step (1) 2 -TiB / Ti gradient composite material for non-destructive cleaning, and TiB 2 -TiB / Ti gradient composite material is boiled in 0.5mol / L sodium hydroxide solution for 75min, then immersed in clean water at room temperature for 100min, then treated in 0.5 / L hydrochloric acid at room temperature for 6min, and finally cleaned with ultrasonic in clean water.

[0026] (3) The TiB that has been cleaned in step (2) 2 -TiB / Ti gradient composite material for mo...

Example Embodiment

[0027] Example 2

[0028] (1) Perform boronizing treatment on the titanium matrix whose surface has been cleaned. The electrolyte composition and mass fraction are 75% anhydrous borax, 15% anhydrous potassium carbonate and 10% B 4 C. Take graphite crucible as anode, metal titanium plate as cathode, and control the cathode current density to 150mA / cm 2 , The temperature of the molten salt electrolyte is 800 ℃, electrify for 4 hours to obtain TiB 2 -TiB / Ti gradient composite material.

[0029] (2) The TiB obtained in step (1) 2 -TiB / Ti gradient composite material for non-destructive cleaning, and TiB 2 -TiB / Ti gradient composite material is boiled in 1mol / L sodium hydroxide solution for 60min, then immersed in clean water at room temperature for 120min, then treated in 1mol / L hydrochloric acid at room temperature for 5min, and finally cleaned by ultrasonic in clean water.

[0030] (3) The TiB that has been cleaned in step (2) 2 -TiB / Ti gradient composite material for molten salt electro...

Example Embodiment

[0031] Example 3

[0032] (1) Perform boronizing treatment on the titanium matrix whose surface has been cleaned. The electrolyte composition and mass fraction are 80% anhydrous borax, 10% anhydrous potassium carbonate and 10% B 4 C. Take graphite crucible as anode, metal titanium plate as cathode, and control the cathode current density to 200mA / cm 2 , The temperature of the molten salt electrolyte is 950℃, and the electricity is applied for 0.5 hours to obtain TiB 2 -TiB / Ti gradient composite material.

[0033] (2) The TiB obtained in step (1) 2 -TiB / Ti gradient composite material for non-destructive cleaning, and TiB 2 -TiB / Ti gradient composite material is boiled in 3mol / L sodium hydroxide solution for 50min, then immersed in clean water at room temperature for 140min, then treated in 2mol / L hydrochloric acid at room temperature for 4min, and finally cleaned by ultrasonic in clean water.

[0034] (3) The TiB that has been cleaned in step (2) 2 -TiB / Ti gradient composite material f...

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Abstract

The invention provides a titanium based cathode material with a uniform and dense TiB2 layer and a preparation method of titanium based cathode material, and belongs to the technical field of cathodematerial preparation. The preparation method comprises the following steps that (1) a titanium substrate with the surface being completely treated is subjected to boronizing treatment, a boronizing agent is prepared from anhydrous borax, anhydrous potassium carbonate and B4C, a graphite crucible serves as an anode, a metal titanium plate serves as a cathode, and thus a TiB2-TiB/Ti gradient composite material is obtained; (2) the surface of the TiB2-TiB/Ti gradient composite material is completely cleaned; and (3) the completely treated composite material is subjected to TiB2 molten salt electrode position, and the TiB2-TiB/Ti gradient composite material with the surface electrodeposited with a TiB2 cladding material is obtained. According to the preparation method, the cathode TiB2-TiB/Tigradient composite material for aluminum electrolysis with the uniform and dense TiB2 outermost layer can be obtained, the TiB2 layer is thickened at the same time, and the service life of the cathodematerial is prolonged.

Description

【Technical field】 [0001] The invention relates to the technical field of preparation of cathode materials, in particular to a method of boronizing and electrodepositioning a titanium base to prepare uniform and dense TiB 2 Layer TiB 2 - Method of cathode gradient composite material for TiB / Ti aluminum electrolysis. 【Background technique】 [0002] Carbon has always been used as a cathode lining material in aluminum electrolysis, but it is not wetted by molten aluminum and is easily eroded and damaged by molten electrolyte and molten aluminum. In order to replace the carbon cathode lining, people continue to strive to find new materials, so far, TiB 2 It is the most ideal aluminum electrolysis cathode lining material, because TiB 2 Not only can it be well wetted by molten aluminum, but it can also resist the erosion of molten aluminum and molten electrolyte. At the same time, the pole distance can be significantly shortened, and the cell voltage and energy consumption can b...

Claims

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Application Information

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IPC IPC(8): C25C3/08C25D11/00
CPCC25C3/08C25D11/00
Inventor 黄有国陈家荣李庆余王少伊储有奇李玉范小萍傅浩王红强
Owner GUANGXI NORMAL UNIV
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