Products/Services for Thoriated Tungsten Filaments
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Fibers and Filaments - (223 companies)Materials Fibers and filaments consist of bulk, chopped fibers or strands and continuous monofilaments of materials and are used in reinforcing composites as well as other specialized electrical and thermal applications. Materials...TypeMaterial TypeBlended Fiber Structure -
Tungsten and Tungsten Alloys - (124 companies)Tungsten and tungsten alloys are refractory metals or alloys with a very high melting point and high density. How to Select Tungsten and Tungsten Alloys. Tungsten and tungsten alloys are heavy refractory metals or alloys with a very high melting... -
Metal Wire - (543 companies)Metal wires are flexible, typically cylindrical rods of metal. They are designed for carrying electricity and for bearing physical stresses and loads. -
Electrodes and Electrode Materials - (430 companies)...of a tungsten or refractory metal filament. Lathanum boride emitters are now used, which provide longer life. Furnace electrodes are used to heat and melt metals or ceramics in arc furnaces. An arc is struck between the electrodes and furnace load... -
Strapping and Filament Tapes - (113 companies)Strapping and filament tapes are strengthened with many woven filaments yarns embedded in the adhesive on the tape 's backing. Strapping or filament tape is a versatile, pressure-sensitive material that allows the user to bundle similar... -
Filament Winding Machines - (33 companies)...is a brand-specific type of filament winding machine for creating bulk storage tanks. Related Information. CR4 Community --Coiling Tungsten Wire. Image credit: McClean Anderson...
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Cathode Emitters and Filaments - (37 companies)...emission. Cold cathodes and hot cathodes are also common; cathodes used for field emission in vacuum tubes are called cold cathodes, whereas cathodes used as heated electrodes or filaments are called hot cathodes. Features. Cathodes have several special...
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Cores and Tubes - (39 companies)Cores and tubes are made of paper, plastic or metal and are used for mailing, shipping, material handling, and product display.
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Incandescent Lamps - (383 companies)Incandescent lamps generate light by passing an electric current through a thin filament wire (usually of tungsten) until the wire is extremely hot. Incandescent lamps generate light by passing an electric current through a thin filament wire until...
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Abrasive Brushes - (85 companies)Abrasive brushes have abrasive filament brush fills, which provide a more aggressive action compared to synthetic or wire filaments. Industrial brushes are used for metal deburring; removing rust, paint or coatings; welding or painting surface...
Product News
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MarShield
Tungsten Vial & Syringe Shields MarShield Tungsten Syringe Shields are all designed to reduce hand exposure in clinicians preparing and administering radiopharmaceuticals. Our tungsten shields are lightweight, sleek in design and easy to use. We offer over 20 different shield types and sizes including Tungsten Vial Transport Containers. Vial Syringe Shields. Vial Pigs. Vial Transport Containers. Sharps Container Shields. We also custom design and manufacture to your specific requirements. Just ask!. Learn About Tungsten... (read more)Browse Radiation Shielding Datasheets for MarShield -
Top Seiko Co., Ltd.
Tungsten : Properties, Uses, and Benefits Introduction. Tungsten, symbolized by W and with an atomic number of 74, stands out due to its exceptional characteristics. It is renowned for having the highest melting point of all elements and is celebrated for its density and hardness. This article will explore the key properties of tungsten, examine its diverse applications, and highlight the benefits it offers across various industries. Additionally, comparative hardness tables will be linked to enhance understanding of tungsten 's... (read more) -
MarShield
Tungsten Radiation Shielding Tungsten Radiation Shielding for Nuclear, Medical & NDT. MarShield Radiation Shielding are experts in the in the customization of tungsten heavy alloy for the Nuclear Energy, Nuclear Medicine / Radioisotope, diagnostic imaging and non-destructive testing industries. Limiting exposure to radiation is achieved by using materials that maximize shielding. The denser the material, the higher degree of shielding it provides. With a density approximately 1.7 timers higher than lead, Tungsten Heavy... (read more)Browse Nondestructive Testing (NDT) Supplies and Accessories Datasheets for MarShield -
MarShield
Reduce Radiation Exposure with Tungsten Shielding Several applications require shielding from radiation where lead is not a feasible material. Tungsten heavy alloy provides an alternative to lead that is strong and highly customizable into precision components. With an approximately 1.7 times greater density than lead, tungsten guarantees radiation exposure is kept to a minimum. Benefits Of Using Tungsten. Tungsten 's higher density means the material provides better gamma ray absorption and radiation shielding. Not only is tungsten thicker... (read more)Browse Radiation Shielding Datasheets for MarShield -
Top Seiko Co., Ltd.
Why is it so hard to machine Tungsten? W " as the chemical symbol, is well-known in the highest melting point among all the metals. The melting point of tungsten is 3422? (6192?). Its density of tungsten is also quite high: 19.3 g/cm3. The high density enables it to work as radiation shields. Tungsten is a useful material under high temperature and high radiation environment. It is, however, not easy to make precision parts in tungsten because of its hardness and brittleness. Tungsten blocks are created by powder metallurgy. Each... (read more) -
ToneCooling Technology Co., Ltd
Diamond Copper & Tungsten Copper Alloys Our Diamond Copper and Tungsten Copper Alloys provide cutting-edge solutions for thermal management in high-performance industries. Diamond Copper combines artificial diamond powder with copper alloys, offering exceptional thermal conductivity (1000W/M.K) and a low thermal expansion coefficient, ideal for demanding electronics and aerospace applications. Diamond Aluminum offers a slightly lower thermal conductivity but with the added benefit of lower density. Tungsten Copper Alloy combines... (read more)Browse Heat Sinks Datasheets for ToneCooling Technology Co., Ltd -
MarShield
Tungsten Shielding Plates for CT Scanner Project with one of the hardest materials, Tungsten alloy, were created with multiple intact features and tight dimensional requirements for SPECT Scanner. MarShield determined the right cutting and machining tools for the job as the most dense and hard tungsten alloy in class was being used in the production of this project. The team Analyzed all the features which were to be machined and validated the tools by conducting a dry run, ironing out these changes. Product Specifications & Construction Details... (read more) -
Running Industry Co., Ltd
Powder Metallurgy parts such as tungsten), pseudo alloys, porous materials, etc. For example, manufacturing special functional materials such as tungsten filament or copper tungsten alloy for light bulbs. Accurate control of ingredients. Powder metallurgy does not melt materials during the material production process, avoiding component segregation and enabling precise control of material ratio and uniformity. Sintering is carried out in a vacuum or reducing atmosphere, resulting in higher purity of the product. Advantages... (read more) -
Harper International Corporation
Carbon Fiber research and development line Even our smallest scientific scale Carbon Fiber research and development line emulates real world production across all equipment, yet delivers the precision and flexibility needed to aid research efforts and future scale up. Requiring only one person to operate, this inventive system is designed to handle very few filaments - from 10 to 20 filaments up to 6k, and operates at about .15 meters per minute or .005kg per hour, as shown here (right) in this R &D system installed at the Georgia... (read more) -
Zeus
Drawn Fiber Performance & Versatility. Available as a braided sleeve or expandable over-braid, Zeus drawn fiber provides the performance and versatility to fit almost any application. Learn More (read more)
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High-power transmitting valves with thoriated filaments for use in broadcasting
SUMMARY A major change that has occurred in high-power transmitting valves during the last decade is the introduction of the thoriated tungsten filament or cathode.
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Use of Thoriated-Tungsten Filaments in High-Power Transmitting Tubes
11 Z. J. Atlee, " Thoriated tungsten filaments in rectifiers," Elec. Eng., vol.
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Pulse Power Considerations For The Generation of 45 µs, 200 keV Electron Beams For CO2 Lasers
The high voltage cathode assembly employs 132 thoriated tungsten filaments distributed over the area of the 250 cm x 10 cm output window.
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THORIUM: A BIBLIOGRAPHY OF PUBLISHED LITERATURE
379 SCHOTTKY EFFECT AND CONTACT POTENTIAL MEAS- UREMENTS ON THORIATED TUNGSTEN FILAMENTS .
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Developments in thermionic valves during the last sixty years
The thoriated tungsten filament was of course more easily damaged by gas poisoning from occluded gases within the envelope and better vacuum systems were necessary; getters were therefore introduced to assist the gas clean-up after the valve had been sealed off.
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Instrument development and plasma measurements on a 200-watt Hall thruster plume
The thoriated tungsten filament is 0.125 mm in diameter and 6 mm in length. . . . . . . . . .
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Thermionic emission
indicated a similar departure from a MAXWELLian distribution for electrons emitted from tungsten filaments and from thoriated tungsten fila- ments .
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Fluctuation voltage in diodes and in multi-electrode valves
This minimum is independent of frequency with thoriated tungsten filaments : with oxide-coated filaments the mini- mum increases, and occurs at a lower current value, as the frequency of operation is decreased; this is due to flicker effect.
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Discussion on ¿A survey of present knowledge of thermionic emitters¿ before the Radio Section, 3rd December, 1952
Valves with thoriated tungsten filaments have been used for many years, but in high-power transmitters it has generally been necessary to restrict their use to the early stages, because the anode voltage must be limited in order to prevent poisoning of…
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A universal multi-mode filament regulator for hard tubes
Elsewhere' the idea of stabilising thoriated tungsten filament power rather than voltage seemed sensible.
