A kind of tungsten-based electrode material and preparation method thereof

An electrode material, tungsten-based technology, applied in the field of tungsten-based electrode material and its preparation, tungsten-based electrode material for high-energy ignition gas discharge tube and its preparation, can solve the problem that the coating is prone to cracking or peeling, and reduces the emission performance of oxide cathode , affecting the service life of electrodes, etc., to achieve the effect of ensuring performance uniformity, improving service life, tissue uniformity and performance uniformity.

Active Publication Date: 2017-06-13
ATTL (BEIJING) ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional oxide cathode is to coat a layer of alkaline earth metal carbonate on the surface of tungsten, which is decomposed at high temperature to obtain oxide, but the coating is prone to cracking or falling off under the action of ions, which affects the service life of the electrode
In addition, the interface between the base metal and the alkaline earth metal oxide coating will react to form an intermediate layer. The existence of the intermediate layer will inhibit the active elements in the base metal from diffusing to the surface layer, reducing the emission performance of the oxide cathode.

Method used

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  • A kind of tungsten-based electrode material and preparation method thereof
  • A kind of tungsten-based electrode material and preparation method thereof

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Experimental program
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Embodiment 1

[0038] According to the tungsten: nickel: strontium mass fraction ratio in the finished tungsten-based electrode material is 98.5:0.5:1, weigh the raw material yellow tungsten, Ni(NO 3 ) 2 ·6H 2 O and Sr(NO 3 ) 2 , Ni(NO 3 ) 2 ·6H 2 O and Sr(NO 3 ) 2 Dissolve completely to obtain the mixed aqueous solution of the two, then pour the mixed aqueous solution into a kneader, then mix yellow tungsten powder (average particle size of 50 μm) into the above mixed aqueous solution, stir and mix evenly through the kneader, the kneader comes with heating The system is always heated during the stirring process, and the heating temperature is 90°C until the powder is completely dry to obtain the precursor powder; the precursor powder is loaded into a boat and calcined in the air with a high-temperature resistance furnace (open the furnace door), the calcining temperature: 750°C, 1h; the calcined powder obtained after calcination is reduced in a reduction furnace under a hydrogen atm...

Embodiment 2

[0043] According to the tungsten: nickel: strontium mass fraction ratio in the finished tungsten-based electrode material is 96.5:0.5:3, weigh the raw material yellow tungsten, Ni(NO 3 ) 2 ·6H 2 O and Sr(NO 3 ) 2 , Ni(NO 3 ) 2 ·6H 2 O and Sr(NO 3 ) 2 Dissolve completely to obtain the mixed aqueous solution of the two, then pour the mixed aqueous solution into a kneader, then mix yellow tungsten powder (average particle size of 50 μm) into the above mixed aqueous solution, stir and mix evenly through the kneader, the kneader comes with heating The system is always heated during the stirring process, and the heating temperature is 85°C until the powder is completely dry to obtain the precursor powder; the precursor powder is loaded into a boat and calcined in the air with a high-temperature resistance furnace (open the furnace door), the calcining temperature: 700°C, 1.5h; the obtained calcined powder is reduced in a reduction furnace under a hydrogen atmosphere, the red...

Embodiment 3

[0046] According to the tungsten: nickel: strontium mass fraction ratio in the finished tungsten-based electrode material is 93.5:0.5:6, weigh the raw material yellow tungsten, Ni(NO 3 ) 2 ·6H 2 O and Sr(NO 3 ) 2 , Ni(NO 3 ) 2 ·6H 2 O and Sr(NO 3 ) 2 Dissolve completely to obtain a mixed aqueous solution of the two, then pour the mixed aqueous solution into a kneader, then mix yellow tungsten powder (average particle size of 40 μm) into the above mixed aqueous solution, stir and mix evenly through the kneader, and the kneader comes with heating The system is always heated during the stirring process, and the heating temperature is 95°C until the powder is completely dry to obtain the precursor powder; the precursor powder is loaded into a boat and calcined in the air with a high-temperature resistance furnace (open the furnace door), the calcining temperature: 700°C, 2h; reduce the obtained calcined powder in a reduction furnace under a hydrogen atmosphere, the reducti...

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Abstract

The invention discloses a tungsten-base electrode material and a preparation method thereof. Tungsten oxide, soluble nickel salt and soluble strontium salt are adopted as raw materials, solid-liquid doping, calcinating, reducing, forming and sintering are carried out in sequence, and the tungsten-base electrode material is prepared. According to 100 parts by weight, the tungsten-base electrode material comprises 88-98.5 parts of tungsten, 0.5-6 parts of nickel and 1-6 parts of strontium. The maximum number of times of discharge of a high-energy ignition gas discharge tube prepared through the electrode material can be 1,980,000. Compared with similar products at abroad, the service life is longer. Great significance in breaking through the limitation of the similar products at abroad on our country and meeting national defense needs is achieved.

Description

technical field [0001] The invention relates to a tungsten-based electrode material and a preparation method thereof, in particular to a tungsten-based electrode material for a high-energy ignition gas discharge tube and a preparation method thereof, belonging to the field of refractory metal materials. Background technique [0002] High-energy ignition gas discharge tubes are mainly used in high-energy igniters as a switch to control high energy. They are mainly used in military aerospace, airborne, and missile-borne engine igniters, and can also be used in ignition systems for civilian ships, boilers, and oil fields. . In terms of military high-energy ignition gas discharge tube technology, due to my country's long-term embargo and blockade by Western countries, it is impossible to introduce relevant advanced technologies and products. [0003] The discharge electrode is an important component of the high-energy ignition gas discharge tube, and its performance directly de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C27/04
CPCC22C1/045C22C27/04
Inventor 张保红牛山廷唐亮亮陈伟刘国辉甘乐林冰涛
Owner ATTL (BEIJING) ADVANCED MATERIALS CO LTD
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