Method for producing cathode component for flashlight

A manufacturing method and flash lamp technology, applied in the manufacture of cathode heaters, etc., can solve problems such as inability to form complex shapes, unstable electron emission, and weak electron emission ability, so as to improve material utilization, save machining costs, and reduce aperture size. controllable effect

Inactive Publication Date: 2011-08-17
XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] Utilizing traditional technology to prepare cathode parts for flash lamps has disadvantages such as unstable electron emission, weak electron emission ability, easy poisoning, intolerance to electron bombardment, short life, difficult welding, inability to form complex shapes, low efficiency and

Method used

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  • Method for producing cathode component for flashlight
  • Method for producing cathode component for flashlight
  • Method for producing cathode component for flashlight

Examples

Experimental program
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Example Embodiment

[0029] Example 1

[0030] Calcinate 2,500g of tungsten powder with a Fischer particle size of 7 μm in a hydrogen furnace at 1,500°C for 3 hours, mill with a ball mill for 1 hour, and pass through a 200-mesh sieve for use. At a temperature of 150°C, mix the above-mentioned treated tungsten powder with 48g of paraffin wax, 20g of polypropylene, 8g of polyethylene and 4g of stearic acid with a double Z-type mixer, and prepare the mixture with an injection molding machine and a mold. figure 2 The shape shown is green and the forming temperature is 160°C. Soak the green body in trichlorethylene at 40°C for 4 hours to remove most of the paraffin and stearic acid in the green body, then slowly raise the temperature to 500°C in a hydrogen furnace and keep it warm for 2 hours to remove the remaining organic matter in the green body , and then heated up to 2000° C. for 3 hours to obtain a cathode substrate, the cathode substrate has a porosity of about 20% and an average pore diameter...

Example Embodiment

[0031] Example 2

[0032] Mix 2250g of tungsten powder with a Fischer particle size of 3μm and 250g of rhenium powder with a Fischer particle size of 10μm evenly, calcinate in a hydrogen furnace at 1000°C for 5 hours, use a ball mill for 2 hours, and pass through a 150-mesh sieve for use. At a temperature of 190°C, mix the raw material powder treated above with 68g of polyoxymethylene, 4.8g of polyethylene, 4g of ethylene-vinyl acetate copolymer, 1.6g of paraffin wax and 1.6g of zinc stearate with a double Z-type mixer, The mixture is prepared with an injection molding machine and a mold figure 2 The shape shown is green and the forming temperature is 180°C. Put the green body in the mixed atmosphere of nitrogen and nitric acid for 4 hours, use nitric acid to decompose the polyoxymethylene in the green body, then slowly raise the temperature of the green body to 700 degrees Celsius and keep it warm for 2.5 hours to remove the remaining organic matter in the green body, and t...

Example Embodiment

[0033] Example 3

[0034] Mix 2250g tungsten powder with a Fischer particle size of 5μm, 125g rhenium powder with a Fischer particle size of 6μm, and 125g iridium powder with a Fischer particle size of 6μm, calcinate in a hydrogen furnace at 1200°C for 1h, use a ball mill for 4h, and pass through 250 Mesh sieve for spare. At a temperature of 160°C, mix 2500g of the above-treated tungsten powder with 52g of paraffin wax, 16g of polypropylene, 5.6g of polyethylene, 4g of ethylene-vinyl acetate copolymer and 2.4g of zinc stearate with a double Z-type mixer, The mixture is prepared with an injection molding machine and a mold image 3 The shape shown is green and the forming temperature is 165°C. Put the green body in a hydrogen furnace and slowly raise the temperature to 800 degrees Celsius and keep it warm for 3 hours to remove the organic matter in the green body, then raise the temperature to 1900 degrees Celsius and keep it warm for 5 hours to obtain a cathode substrate. Th...

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Abstract

The invention provides a new method for producing a cathode component for a flashlight. The method comprises the following steps of: carrying out calcining, ball milling and sieving on powdered raw materials, uniformly mixing the powdered raw materials with a thermoplastic or thermoset organic matter under the heating state, preparing the mixture into a green body having a certain shape by adopting the metal injection molding process, removing the organic matter in the green body through a chemical or heating method, obtaining a cathode basal body with certain porosity through high-temperature sintering, immersing an electron emission substance in a gap on the cathode basal body, and finally obtaining the cathode component for the flashlight through surface cleaning, washing and high-temperature treatment. The method has the advantage of preparing the cathode basal body material with considerably uniform density, controllable porosity and pore diameters, uniform pore diameters and narrow pore diameter distribution, simplifying the process for preparing the cathode component for the flashlight, reducing the production cost, and achieving volume production, low cost and considerablycomplex production shapes.

Description

technical field [0001] The invention relates to a manufacturing method of a cathode part for a flash lamp. Background technique [0002] The cathode assembly is the core component of the flash lamp (typically including xenon flash lamp, helium flash lamp, etc.), and the cathode is the heart of the cathode assembly, which is mainly used to emit electrons. The matrix of the cathode part is a porous structure, and the performance of the cathode assembly is mainly determined by the cathode assembly. The pore size of the substrate, the pore size distribution, the type of electron emitter and the impregnation of the electron emitter are determined. [0003] The cathode assembly is generally composed of cathode parts and support rods, such as figure 1 As shown, 1 in the figure is the cathode part, 2 is the support rod, and 1 and 2 are combined by welding. [0004] There are three main methods of traditional flash lamp cathode assembly manufacturing, as follows: [0005] Method 1...

Claims

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Application Information

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IPC IPC(8): H01J9/08
Inventor 欧阳明亮宋久鹏赖亚洲于洋庄志刚
Owner XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD
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