Method for preparing nano composite material by supercritical fluid electroforming

A nano-composite material and supercritical fluid technology, applied in electroforming, electrolytic coating, electrolytic process, etc., can solve the problems of difficult control of electroforming layer uniformity and easy agglomeration of nanoparticles. smooth surface effect

Active Publication Date: 2011-08-10
临沂恩科开发建设有限公司
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a supercritical fluid with uniform dispersion of nanoparticles, smooth surface, dense structure, fine grains and excellent performance in view of the prob

Method used

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  • Method for preparing nano composite material by supercritical fluid electroforming
  • Method for preparing nano composite material by supercritical fluid electroforming
  • Method for preparing nano composite material by supercritical fluid electroforming

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Embodiment 1）

[0021] See figure 1 , The device used in the method of this embodiment includes an electroforming device 1 , a carbon dioxide gas cylinder 2 , a high-pressure pump 3 and a DC power supply 4 .

[0022] The electroforming device 1 has a reactor 11 , a cathode 13 , an anode 14 , an adjustment plate 15 , a heating coil 16 and a mechanical stirrer 17 . The reactor 11 is a closed pressure vessel, including a reactor main body 11-2 and a reactor lining 11-1. The reactor main body 11-2 is made of stainless steel or high-strength structural steel, and the reactor lining 11-1 is made of corrosion-resistant tetrafluoroethylene material. An air inlet 12 and a liquid outlet 18 are provided above the reactor main body 11 - 2 . The cathode 13 includes a cathode body 13-2 and a cathode template 13-1, and the anode 14 includes an anode body 14-2 and an anode template 14-1. The main body of the anode template 14-1 is a mesh metal plate, and the material of the mesh metal plate is the same as...

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Abstract

The invention discloses a method for preparing nano composite material by supercritical fluid electroforming, which comprises the following steps of: (1) adding metal salt solution, nano granules and composite additive into a reactor of an electroforming device, stirring uniformly, introducing carbon dioxide gas, and stirring at the temperature of between 35 and 50 DEG C under the pressure of 8 to 20MPa to generate supercritical fluid electroforming solution containing the nano granules; (2) setting pulse interval at 1 to 5 microseconds, setting the pulse width at 10 to 30 microseconds, setting the current density at 1 to 3A/dm<2>, switching on a direct-current power supply, and making the metal ions and the nano granules in the metal salt solution deposited on a cathode template togetherto obtain a nano composite electroforming layer; and (3) after the deposition is completed, obtaining the nano composite material by corresponding treatment. The method can electroform the nano composite material electroforming layer with uniform nano granule dispersion, flat surface, compact tissue, fine crystal grain and excellent performance.

Description

technical field [0001] The invention belongs to the field of electrochemical processing, and in particular relates to a method for preparing nanocomposite materials by supercritical fluid electroforming. Background technique [0002] The principle of the composite electroforming process is to add particles with special properties such as ceramics and diamonds into the electroforming solution, use the conductive original mold (or metal parts) as the cathode, and use the metal plate for electroforming as the anode. Under the action of the electric field, the metal ions continuously capture the particles, reduce them to metal at the cathode, and deposit on the surface of the cathode together. During this period, the anode metal continuously turns into ions and dissolves into the electroforming solution for replenishment, so that the concentration of metal ions in the solution remains constant. When the composite electroformed layer of the cathode original mold gradually reache...

Claims

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Application Information

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IPC IPC(8): C25D1/00C25D15/00
Inventor 雷卫宁刘维桥李小平
Owner 临沂恩科开发建设有限公司
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