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Chemical preparation method of novel porous titanium

A technology of porous titanium and titanium sheets, which is applied in the field of preparation of porous titanium, can solve the problems of reduced corrosion resistance, achieve stable properties, good application prospects, and easy large-scale production

Inactive Publication Date: 2012-09-12
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium is not easily corroded because it is easy to form a passivation film. However, in the presence of F-, its corrosion resistance will be greatly reduced, and it can be carved into a porous structure, or even eroded to disappear.

Method used

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  • Chemical preparation method of novel porous titanium
  • Chemical preparation method of novel porous titanium
  • Chemical preparation method of novel porous titanium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Cut the 100um thick titanium sheet into an area of ​​1.4*1.9cm 2 Ultrasonic cleaning with detergent, water, and absolute ethanol for 10 minutes, rinsed with water and dried, then placed in 10w% oxalic acid aqueous solution at 100°C for 3 hours, rinsed with water, and dried to obtain a clean surface with microscopic unevenness titanium sheet.

[0023] (2) Use the above-mentioned treated titanium sheet as a cathode, with an area of ​​3*3.5cm 2 The titanium sheet is used as the anode, and the center of the two-pole titanium sheet is perpendicular to the center line of the two titanium sheets, and the distance between the two electrodes is 1cm. put into by HF, CH 3 COOH and H 2 O in the electrolyte solution with a volume ratio of 1:5:40, boost the voltage to 20V within 5 minutes, etch the cathode for 25 minutes, rinse with water and dry to obtain a porous titanium mesh.

Embodiment 2

[0025] (1) Cut the 100um thick titanium sheet into an area of ​​4.5*4.5cm 2 Ultrasonic cleaning with detergent, water, and absolute ethanol for 10 minutes, rinsed with water and dried, then placed in 10w% oxalic acid aqueous solution at 100°C for 3 hours, rinsed with water, and dried to obtain a clean surface with microscopic unevenness titanium sheet.

[0026] (2) Use the above-mentioned treated titanium sheet as a cathode, with an area of ​​5*5cm 2 A titanium sheet is used as the anode, the centers of the two poles are aligned and the parallel spacing of the titanium sheets is 1 cm. put into the initial by HF, CH 3 COOH and H 2 O in the electrolyte solution with a volume ratio of 1:15:100, by continuously changing the voltage and adding a small amount of HF, the current is kept constant at 0.5A, and the cathode is etched for 50min. Rinse and dry to obtain a porous titanium mesh.

Embodiment 3

[0028] (1) Cut the 100um thick titanium sheet into an area of ​​4.5*4.5cm 2 Ultrasonic cleaning with detergent, water, and absolute ethanol for 10 minutes respectively, rinsed with water and dried, then placed in 15w% oxalic acid aqueous solution at 100°C for 5 hours, rinsed with water, and dried to obtain a clean and microscopic surface. Uneven titanium sheet.

[0029] (2) The above-mentioned treated titanium sheet is used as a cathode, with an area of ​​5*5cm 2 A titanium sheet is used as the anode, the centers of the two poles are aligned and the parallel spacing of the titanium sheets is 1 cm. put into by HF, CH 3 COOH and H 2 O in the electrolyte solution with a volume ratio of 1:10:80, boost the voltage to 20V at a boost rate of 2V / min, etch the cathode for 100min, rinse with water, and dry to obtain the corresponding porous titanium mesh.

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Abstract

The invention provides a chemical preparation method of novel porous titanium. The chemical preparation method is characterized in that a metal titanium plate as a substrate is subjected to surface dirt removal cleaning treatment and then is treated in an oxalic acid solution for a certain time so that the uneven metal titanium plate is obtained; and in a system composed of a common acid or salt, a solvent and a corrosive acid, the uneven metal titanium plate is electrolyzed at a cathode under voltage of 2 to 40V by an electrochemical cathode etching method for a time so that a porous titanium mesh which has apertures having uneven and controllable sizes and has a black-white degree-controllable titanium surface color is obtained. The chemical preparation method has the advantages of simple processes, convenient operation, low equipment requirements and easily controllable conditions. The porous titanium mesh obtained by the chemical preparation method has stable properties and small thickness, is soft and has good application prospects in related fields of photovoltaics, photocatalysis, electrocatalysis and medicine.

Description

technical field [0001] The present invention relates to a preparation method of porous titanium and its application in photovoltaic industrialization. Specifically, it relates to an electrolyte solution composed of ordinary acid or salt, water and corrosive acid after being treated in oxalic acid solution. Porous titanium was obtained by cathodic etching in the medium, and the application of this titanium mesh to the preparation of series-parallel components of solar cells has achieved good results. Background technique [0002] Titanium and titanium alloys have excellent properties such as low density, high specific strength, good biocompatibility and corrosion resistance, and have important applications in aerospace, biomedicine and other fields. In the field of biomedicine, titanium can quickly form a passivation film in human body fluids, thereby preventing titanium from releasing metal ions to the human body. Titanium and titanium alloys are made into biological implant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/08
Inventor 周幸福解海先邵长林
Owner NANJING UNIV OF TECH
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