Barium Tungsten Electrode

Barium tungsten electrode is with characteristics of low electron work function, high electron current density, better starting performance and low temperature resistance, and is often used in the field of xenon flash lamps.

Barium tungsten electrode is with characteristics of low electron work function, high electron current density, better starting performance and low temperature resistance, and is often used in the field of xenon flash lamps. It is a kind of an electrode product that adds alkaline earth metal barium to pure tungsten electrodes. Its good physical properties and superior chemical properties is often used in the field of xenon flash lamps.

Compared with pure tungsten electrode material (tungsten content more than 99.5%), tungsten barium electrode has lower electron work function (φ=1.6 ev), higher electron current density (10A/cm2), and better startup Performance, and better low-temperature resistance, so it is often used as a photography lamp, electronic bayonet lamp, skin rejuvenation and hair removal beauty lamp, solar detector, pump light source lamp, electric pulse sterilization, industrial counting lamp, indicator light and Electrode materials in signal lights, etc.

BaW electrode can be prepared by dipping method, but this method has the disadvantages of complicated operation and difficult processing. The process to produce the electrode by dipping method is as following: 

Preparation of tungsten sponge: raw materials: 97g tungsten powder (250 mesh/cm2), 3g paraffin wax, 30-40cc aviation gasoline, glycerin; preparation process: pour gasoline into paraffin wax, melt the paraffin, and then pour the tungsten In the powder (about 180°C), stir quickly until no gasoline smell is smelled, then press into a block, and then sinter the pressed product at low temperature. The sintering temperature is 100~150°C/hour before rising to 600°C The speed is 200°C/hour at 600~1400°C, the temperature is about 1700°C during molding, and the final high temperature sintering (2000°C) is about half an hour.

Emission material: Put the barium aluminate into an oven at 100℃ for baking, then grind it into a block and put it in a molybdenum boat, add Al2O3 for sintering, when the sintering temperature reaches 700~800℃, Keep the temperature for 1 hour. When the sintering temperature is 1400°C, keep the temperature for 2 hours. After sintering into agglomerates, grind it to obtain a finished product.

Impregnated BaW electrode: Put barium aluminate into nitrocellulose and stir to form a paste, apply it to the surface of the tungsten sponge, and burn it to 1750°C until the color of the product is light green, and then sinter it. The electrode is put into a quartz container and vacuum-baked to obtain a finished product. Finally, the electrode is stored in a dry vacuum environment.

If you have any inquiry of cerium tungsten electrode, please feel free to contact us:

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Tungsten Alloy Weight Application – Golf Head

Tungsten alloy weight is used in golf to increase the weight of golf head. In order to improve the performance of golf clubs, the weight is added to the golf end. Compared with traditional weights (iron, lead, steel, zinc, etc.), tungsten alloy is more suitable as a weight for golf heads, because it owns the properties of greater density, stronger corrosion resistance and better impact resistance, which can effectively enhance the end product's durability.

The golf end is a part of the golf club. It has a ball hitting surface, a top and a bottom. The top is connected with a neck tube at its root end. The bottom of the ball head is provided with a receiving groove. The receiving groove is provided with a groove at the bottom. There is a first solder inside; a counterweight is arranged in the containing groove, and the specific gravity of the counterweight is greater than the specific gravity of the material at the bottom of the ball head.

The weight of the ball head is generally made of tungsten alloy. In order to facilitate disassembly and replacement, tungsten alloy counterweights are often made of screws. For beginners, not only do they have different club length requirements, but they also have different options for the weight of the head, depending on their own strength. In other words, the length of the club and the weight of the head will directly affect the direction and strength of the player when hitting the ball.

WHA weight is a high-density alloy, which has great advantages over other metals in terms of weight and volume. It can reduce the center of gravity of the club and improve the balance of the club. The density of tungsten alloy is twice that of steel, and it is also higher than lead, aluminum, and iron. It is an excellent material for weight parts. In addition, tungsten alloy is also an environmentally friendly material, which will not cause greater pollution to the ecological environment like lead, so it can better meet the development requirements of breeding parts.

If you have any inquiry of cerium tungsten electrode, please feel free to contact us:

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AC Contactor Tungsten Contacts

AC contactor is applied tungsten copper or tungsten iron contact as main connecting parts. AC refers to alternative current. 

Why tungsten contacts are selected for the contacts of AC contactors? Tungsten as raw material made contacts are with superior properties.

Contacts made with tungsten sheet and iron or copper leg are with properties of high temperature resistance, which can effectively avoid melting due to the increase of external temperature, so that the contact performance of the circuit can be improved.

The W contact has superior thermodynamic performance and better heat dissipation performance, which can significantly extend the single working time of the AC contactor.

Contact applied tungsten, is used purity over 99.95%, so it is with a low impurity content and a smooth surface.

AC contactors are commonly used to eliminate the arcs generated by the moving and static contacts during the opening and closing process; the working principle is to use electromagnetic force and spring elastic force to achieve the connection and breaking of the contacts, so there are two working states, namely Power-off state (release state) and energized state (action state).

In many cases, Alternative Current contactor contacts will malfunction due to overheating or burns. How does the overheating phenomenon occur?

The contactor is working in a place where the ambient temperature is too high for a long time, which will naturally increase the temperature of the contactor.

The cross-sectional area of ​​the place where the contact is poor is small, which causes the resistance in the place to be larger, and the passing current will be larger, the power loss will be higher, and the heat generated will be more, which will cause the temperature to rise. Burn the wires.

Spark discharge occurred at the contact point. Spark discharge will produce high temperature, which is mainly because the periodic decrease of current leads to frequent spark discharge at the contact point and rapid temperature rise.

After the introduction of the above content, we also have a certain understanding of why the temperature of the Alternative Current contactor will rise. Nowadays, in order to prevent the contacts from being burned, tungsten made contacts are used more widely as the contacts of AC contactors.

If you have any inquiry of cerium tungsten electrode, please feel free to contact us:

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Tungsten Contact Application - Switches

Tungsten contact is widely used in switches as a part to connect or disconnect the electricity. The so-called tungsten switch contact can be simply understood as the switch's contact point is made of metal tungsten, which has good heat resistance, lower resistance, good chemical stability and other advantages, and can be very good circuit connection or break, thereby reducing the probability of electrical equipment failure. Contact made of tungsten made of metal tungsten, which is often used in industry, agriculture, science and technology and national defense. Tungsten is a non-ferrous metal and also an important strategic metal. It has a silver-white appearance, metallic luster, high melting point, great hardness, low vapor pressure, and low evaporation rate. It is widely used in many fields.

The simplest switches have two pieces of metal called "contacts". When the two contacts are connected, the current can form a loop, and vice versa. It can be said that the contact point is the most important part of the switch. Therefore, the following aspects should be paid attention to when selecting raw materials for switch contacts.

When choosing contact metal, it is necessary to consider the degree of its resistance to corrosion, because most metals will form insulating oxides after being oxidized, which will make the contact not work properly. The electrical conductivity, hardness, mechanical strength, production cost, and toxic materials should be considered when selecting contact metal.

In order to improve the performance of contact points, manufacturers often electroplating corrosion-resistant metals such as metallic nickel on the contacts or use non-metallic conductive materials such as conductive plastics, which can effectively avoid adverse effects due to air oxidation.

In recent years, with the continuous development of science and technology, most of the switch contacts now use tungsten contacts. This is mainly because tungsten contacts have more excellent physical and chemical properties than traditional contact points and are not easily oxidized in air to produce an insulator.

If you have any inquiry of cerium tungsten electrode, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.