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Method for preparing tungsten needle tip electrode based on electric field evaporation and implementing device thereof

A technology of tungsten needles and electrodes, which is applied in the field of preparation of tungsten needle-point electrodes, can solve the problems of complex preparation devices and low repeatability of needle points, and achieve the effects of improving preparation efficiency, high product repeatability, and simple devices

Inactive Publication Date: 2020-06-09
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0010] The present invention aims to solve the problems of many drawbacks in the existing tungsten tip electrode preparation method, which lead to complex preparation devices and low repeatability of the prepared tip electrodes, and now provides a method for preparing tungsten tip electrodes based on electric field evaporation and its realization device

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  • Method for preparing tungsten needle tip electrode based on electric field evaporation and implementing device thereof
  • Method for preparing tungsten needle tip electrode based on electric field evaporation and implementing device thereof
  • Method for preparing tungsten needle tip electrode based on electric field evaporation and implementing device thereof

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specific Embodiment approach 1

[0029] Embodiment 1: The method for preparing tungsten tip electrodes based on electric field evaporation described in this embodiment includes the following steps:

[0030] Preliminary refinement processing steps:

[0031] Before preparing the needle-tip electrode, the tungsten needle electrode should be pre-prepared, that is, the preliminary thinning treatment. There are two treatment methods:

[0032] First, the method of electrochemical corrosion is adopted. The diameter of the tungsten wire used in the method is 0.5 mm, and the electrolyte solution is 2 mol / L NaOH solution. The thinner the diameter of the tungsten wire, the thinner the etched needle tip. However, the diameter of the tungsten wire is too thin and the mechanical strength is not enough, which is not conducive to the utilization of follow-up work, so this method can only be used as a preliminary thinning treatment. In the relevant experiments in the atmospheric environment, tungsten wires with a diameter o...

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Abstract

The invention discloses a method for preparing a tungsten needle tip electrode based on electric field evaporation and an implementing device thereof and relates to the technical field of preparationof tungsten needle tip electrodes. The method and device provided by the invention aim at solving problems existing in an existing tungsten needle tip electrode preparation method. According to the method and device, the core process occurs in the atmosphere, the position of equipment is relatively fixed, an optical microscopic system with the appropriate resolution ratio is suitable for being additionally arranged, the needle tip shape is monitored in real time, the device is simple, and the needle tip preparation efficiency is improved. By means of the method for preparing the tungsten needle tip electrode based on electric field evaporation and the implementing device thereof, a tungsten needle tip with the radius of curvature at submicron order or below can be obtained and can be widely applied to the technical fields of corona, electric tree and plasma generating in a high voltage technology, medical minimally invasive electrotome and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of tungsten needle-point electrodes. Background technique [0002] Due to its physical and chemical properties (compared with other metals: highest melting point, stable chemical properties in atmospheric environment, good electrical conductivity, good mechanical strength), tungsten wire is more suitable as a needle electrode. At present, electrochemical corrosion is the most commonly used method to prepare tungsten tip electrodes in the laboratory atmospheric environment. [0003] The most common method is the DC-drop method, that is, the needle tip is immersed in the electrolyte solution (NaOH) as an anode and is corroded by direct current electrolytic reaction, and the tungsten wire near the liquid surface will be corroded relatively quickly. The speed forms a thinner neck and finally breaks, and the etched upper tungsten wire is the required needle point. However, this method also has di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F4/02
CPCC23F4/02
Inventor 孙志赵大帅孙兴花雨韩柏
Owner HARBIN UNIV OF SCI & TECH
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