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Method for preparing metal micro-nano hollow spherical powder

A powder preparation, micro-nano technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of ungiven shell thickness, high processing conditions, and complex device structure, etc. Achieve the effect of shortening the production cycle, shortening the production cycle, and simple processing conditions

Active Publication Date: 2014-02-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method requires high processing conditions, complex device structure, high production cost, and no specific shell thickness is given

Method used

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  • Method for preparing metal micro-nano hollow spherical powder
  • Method for preparing metal micro-nano hollow spherical powder
  • Method for preparing metal micro-nano hollow spherical powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The metal nickel plate is processed into a rectangular tool electrode 3 and a workpiece electrode 6, and the electrode surface is deoxidized and smoothed. The workpiece electrode as the negative electrode is placed at the bottom of the cylindrical working fluid tank 8, and the tool electrode as the positive electrode is suspended in the working fluid tank through the servo feed device 2 fixed on the wall of the working fluid tank, pointing downward. Facing the workpiece electrode, in order to maintain the required gap for spark discharge during processing, connect the tool electrode and workpiece electrode to the positive and negative interfaces of the pulse power supply device 1, pour kerosene as the working fluid 4 into the working fluid tank, and make the tool electrode The lower end of the part extends into the kerosene. The power of the ultrasonic generator of the ultrasonic device is 100W, and the frequency is 20KHZ. There are 6 ultrasonic vibrators in the ultraso...

Embodiment 2

[0038] The metal nickel plate is processed into a rectangular tool electrode 3 and a workpiece electrode 6, and the electrode surface is deoxidized and smoothed. The workpiece electrode as a negative electrode is placed at the bottom of the square working fluid tank 8, and the tool electrode as a positive electrode is suspended in the working fluid tank through the servo feed device 2 fixed on the wall of the working fluid tank, pointing downwards to the working fluid tank. In order to maintain the required gap for spark discharge during processing, connect the tool electrode and the workpiece electrode with the positive and negative interfaces of the pulse power supply device 1, and pour the plasma water as the working fluid 4 into the working fluid tank to make the tool electrode The lower part protrudes into the plasma water. The power of the ultrasonic generator of the ultrasonic device is 200W, and the frequency is 60KHZ. There are 4 ultrasonic vibrators in the ultrasonic...

Embodiment 3

[0041] The metal copper plate is processed into rectangular tool electrode 3 and workpiece electrode 6, and the electrode surface is deoxidized and smoothed. The workpiece electrode as the negative electrode is placed at the bottom of the cylindrical working fluid tank 8, and the tool electrode as the positive electrode is suspended in the working fluid tank through the servo feed device 2 fixed on the wall of the working fluid tank, pointing downward. Facing the workpiece electrode, in order to maintain the required gap for spark discharge during processing, connect the tool electrode and workpiece electrode to the positive and negative interfaces of the pulse power supply device 1, pour kerosene as the working fluid 4 into the working fluid tank, and make the tool electrode The lower end of the part extends into the kerosene. The power of the ultrasonic generator of the ultrasonic device is 400W, and the frequency is 100KHZ. There are 2 ultrasonic vibrators in the ultrasonic...

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Abstract

The invention discloses a method for preparing metal micro-nano hollow spherical powder. The method comprises the main contents of: correspondingly immersing a tool electrode and a workpiece electrode into a working fluid, wherein a gap required by spark discharge is kept between the tool electrode and workpiece electrode; and switching on a pulse power supply to enable the tool electrode and the workpiece electrode to generate spark discharge to be molten and gasified, and meanwhile implementing supersonic vibration on the working fluid between the tool electrode and the workpiece electrode during the spark discharge process, so that the working fluid in the gap generates micro-bubbles, and molten and gasified metal materials of the tool electrode and the workpiece electrode are attached and sedimentated on the surfaces of the micro-bubbles to form metal micro-nano hollow spheres. By adopting the method disclosed by the invention, the prepared metal micro-nano hollow spherical powder has high degree of hollowness, the particle diameter ranges from 20 nanometers to 100 micrometers, the wall surface is not larger than 1 micrometer, and the proportion of the hollow spheres is high. The micro-nano hollow sphere exhibits special outstanding performances in terms of physics, chemistry, electromagnetics and photology, and can be widely applied to the fields of chemistry, metallurgy, material, aerospace and the like.

Description

technical field [0001] The invention relates to the preparation technology of metal hollow powder, more specifically, relates to a method for preparing metal micro-nano hollow sphere powder. Background technique [0002] Due to its special hollow structure, micro-nano hollow powder has a larger specific surface area and lower density than ultra-fine solid powder, and exhibits special and excellent performance in physics, chemistry, electromagnetics and optics, especially in terms of absorbing waves. Powders have enormous application potential. The structure and wall thickness of the magnetic hollow powder not only directly affect the fluctuation of its own permittivity and magnetic permeability, but also directly control its wave-absorbing performance, and also directly affect the weight of its covering and shielding stealth bodies, such as aircraft and missiles. Weight is very important to aircraft, missiles, etc., and the requirements are very strict. General absorbing st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/14B82Y40/00B82Y30/00
Inventor 李翔龙徐雪梅宋宏伟
Owner SICHUAN UNIV
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