Method for improving efficiency of hollow sphere preparation by template dissolving method

Abstract

The invention relates to a method for improving efficiency of hollow sphere preparation by a template dissolving method, which belongs to the field of material preparation. During a process of using the template dissolving method to prepare millimeter or micron metal or alloy hollow spheres, the surface of a millimeter or micron metal or alloy template is coated with a metal or alloy shell layer to form a composite sphere in a core-shell structure, nano metal or alloy particles are added in plating solution, and the particles are scattered to be embedded into the shell layer by means of composite chemical plating or composite plating. The electrode potential of the particles is lower than that of the shell layer. Using the method can evidently shorten template dissolving time and greatly improve the efficiency of millimeter or micron metal or alloy hollow sphere preparation by the template dissolving method. Further, the size and amount of micropores formed on the shell layer by acid etching can be controlled by adjusting the size and amount of the particles added in the plating solution.

Description

technical field

[0001] The invention relates to a method for improving the efficiency of preparing hollow spheres by the dissolution template method, in particular to a method for improving the efficiency of the preparation of millimeter or micron-scale metal or alloy hollow spheres by the dissolution template method, and belongs to the field of material preparation. Background technique

[0002] Various materials such as porous materials, damping materials or wave-absorbing materials can be prepared by combining metal hollow spheres or alloy hollow spheres with other materials, which can be used for sound-absorbing and vibration-reducing foam metals, coating materials with electromagnetic shielding functions, and battery electrodes. materials etc. When preparing the above materials, it is often necessary to prepare metal or alloy hollow spheres on the order of millimeters or microns according to the requirements of the specific properties of the materials.

[0003] Form a ...

Examples

Embodiment 1

[0014] Configure 20g / L CoSO 4 Solution 200mL, 30g / L potassium sodium tartrate solution 100mL, 2g / L edetate disodium solution 100mL, the three solutions are uniformly mixed, then stir and add 5mol / L NaOH solution 150mL to obtain the pH value 13 electroless cobalt plating solution.

[0015] Weigh 20g of iron balls with an average diameter of 0.8mm, pickle them with 300mL of 1% HCl for 5 minutes to remove the oxide layer and oil on the surface of the iron balls, rinse the pickled iron balls with deionized water, and use them as templates .

[0016] Weigh 0.3g of iron particles with an average diameter of 30nm, add the iron particles and template iron balls into the plating solution, heat the plating solution to 50°C, and pour into the plating solution under the conditions of ultrasonic vibration and mechanical stirring Add 10mL of hydrazine hydrate as a reducing agent to start the cobalt plating reaction. After 1 hour of reaction, no bubbles escape from the plating solution. At...

Embodiment 2

[0018] Configure 20g / L CoSO 4 Solution 250mL, 30g / L potassium sodium tartrate solution 50mL, 1g / L ethylenediaminetetraacetic acid disodium solution 100mL, the three solutions are uniformly mixed, and then stirred and added with 5mol / L NaOH solution 150mL to obtain pH> 13 baths for electroless cobalt plating.

[0019] Weigh 20 g of iron balls with an average diameter of 70 μm, pickle with 300 mL of 1% HCl for 1 min to remove the oxide layer and oil on the surface of the iron balls, rinse the pickled iron balls with deionized water, and use them as templates.

[0020] Weigh 0.3g of iron particles with an average diameter of 30nm, add the iron particles and template iron balls into the plating solution, heat the plating solution to 50°C, and pour into the plating solution under the conditions of ultrasonic vibration and mechanical stirring Add 10mL of hydrazine hydrate as a reducing agent to start the cobalt plating reaction. After 30 minutes of reaction, no bubbles escape from ...

technical field

[0001] The invention relates to a method for improving the efficiency of preparing hollow spheres by the dissolution template method, in particular to a method for improving the efficiency of the preparation of millimeter or micron-scale metal or alloy hollow spheres by the dissolution template method, and belongs to the field of material preparation. Background technique

[0002] Various materials such as porous materials, damping materials or wave-absorbing materials can be prepared by combining metal hollow spheres or alloy hollow spheres with other materials, which can be used for sound-absorbing and vibration-reducing foam metals, coating materials with electromagnetic shielding functions, and battery electrodes. materials etc. When preparing the above materials, it is often necessary to prepare metal or alloy hollow spheres on the order of millimeters or microns according to the requirements of the specific properties of the materials.

[0003] Form a ...

Examples

Embodiment 1

[0014] Configure 20g / L CoSO 4 Solution 200mL, 30g / L potassium sodium tartrate solution 100mL, 2g / L edetate disodium solution 100mL, the three solutions are uniformly mixed, then stir and add 5mol / L NaOH solution 150mL to obtain the pH value 13 electroless cobalt plating solution.

[0015] Weigh 20g of iron balls with an average diameter of 0.8mm, pickle them with 300mL of 1% HCl for 5 minutes to remove the oxide layer and oil on the surface of the iron balls, rinse the pickled iron balls with deionized water, and use them as templates .

[0016] Weigh 0.3g of iron particles with an average diameter of 30nm, add the iron particles and template iron balls into the plating solution, heat the plating solution to 50°C, and pour into the plating solution under the conditions of ultrasonic vibration and mechanical stirring Add 10mL of hydrazine hydrate as a reducing agent to start the cobalt plating reaction. After 1 hour of reaction, no bubbles escape from the plating solution. At...

Embodiment 2

[0018] Configure 20g / L CoSO 4 Solution 250mL, 30g / L potassium sodium tartrate solution 50mL, 1g / L ethylenediaminetetraacetic acid disodium solution 100mL, the three solutions are uniformly mixed, and then stirred and added with 5mol / L NaOH solution 150mL to obtain pH> 13 baths for electroless cobalt plating.

[0019] Weigh 20 g of iron balls with an average diameter of 70 μm, pickle with 300 mL of 1% HCl for 1 min to remove the oxide layer and oil on the surface of the iron balls, rinse the pickled iron balls with deionized water, and use them as templates.

[0020] Weigh 0.3g of iron particles with an average diameter of 30nm, add the iron particles and template iron balls into the plating solution, heat the plating solution to 50°C, and pour into the plating solution under the conditions of ultrasonic vibration and mechanical stirring Add 10mL of hydrazine hydrate as a reducing agent to start the cobalt plating reaction. After 30 minutes of reaction, no bubbles escape from ...