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Preparation method of multilayer titanium-nickel alloy filter film

A technology of titanium-nickel alloy and filter membrane, which is applied in the field of nano-scale porous metal filter media and its preparation, can solve the problems of slow heating rate, alloy densification, difficulty in obtaining high-porosity porous titanium-nickel alloy, etc., and achieves low cost , good flexibility and high strength

Inactive Publication Date: 2017-08-08
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

However, the heat released during the combination of Ti and Ni will increase the local temperature of the compact and produce a liquid phase in the compact, which will easily lead to the densification of the alloy. Therefore, the temperature rise rate is required to be very slow during sintering, which makes the powder sintering method difficult Difficult to get high porosity, larger size porous titanium-nickel alloy

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  • Preparation method of multilayer titanium-nickel alloy filter film

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Embodiment Construction

[0019] Under nitrogen protection, high-purity carbonyl nickel powder (median diameter 6.7 μm) and ultrafine titanium hydride powder (median diameter 5.2 μm) were mixed for 12 hours in a V-shaped mixer at a mass ratio of 55:45; 8.0g of 32000 polyvinyl butyral was dissolved in 80mL of absolute ethanol by ultrasonic at 40°C, and magnetically stirred for 35min; Mix with the film-forming slurry, and stir under magnetic force for 80 minutes. Take 6g of film slurry, adjust the pressure of the film forming device to 0.8kPa, coat the surface of the quartz plate evenly, transfer it to a nitrogen atmosphere after there are no bubbles on the surface of the film, and let it stand and dry at 40°C for 4.5 hours to form a single-layer titanium-nickel alloy prefabricated film ; Use zinc stearate intervals to continue the second and third layers of coating process. After the upper layer of raw film is dry, control the speed to remove the film, and place it in a vacuum sintering furnace for sin...

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Abstract

The invention provides a preparation method of a multilayer titanium-nickel alloy filter film. The method is characterized by including the steps of: (1) mixing high purity titanium hydride powder and high purity nickel carbonyl powder according to certain proportion; (2) preparing the high purity titanium hydride and nickel carbonyl mixed powder and a polyvinyl butyral liquid into a mixed slurry according to certain mass ratio, covering a smooth quartz surface with a film by a film formation apparatus, and performing standing drying in nitrogen; (3) using thin-layer zinc stearate for spacing on a dried prefabricated film layer, using the mixed slurry for film covering successively, and performing standing drying; and (4) removing the product from the quartz panel surface to form a multilayer titanium-nickel green film, controlling the temperature raising program, and carrying out vacuum sintering, thus obtaining the multilayer titanium-nickel alloy filter film. The method provided by the invention has a simple process, and the obtained material has stable performance, therefore the method is suitable for industrial production.

Description

[0001] Technical field: [0002] The invention relates to a metal filter medium, in particular to a nanoscale porous metal filter medium and a preparation method thereof. The preparation of the present invention is simple, the process parameters are easy to control, and its product structure and properties are very suitable for use as an air purification element or a mask filter element for effectively isolating PM2.5. The obtained product has good biocompatibility and can be regenerated and cleaned. Strong plasticity, light and soft, not easy to damage, durable, can be bent at will, strong adjustability, and can be used as a mask filter to better fit the face structure. [0003] Background technique: [0004] At present, most of the air filters in my country use glass fiber or melt-blown fiber non-woven fabric as the filter element, but due to the large pores between the fibers, usually 5-25 μm, it is difficult to achieve PM2.5 pollutants. High-efficiency filtration, and durin...

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Application Information

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IPC IPC(8): B01D71/02B01D67/00
CPCB01D71/022B01D67/0039
Inventor 喻林萍乔越康建刚南博王娜娜喻强
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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