Tungsten News

Tungsten News
How Does Tungsten Needle to Obtain a Precise Tip Radius? 167

Tungsten needle is a kind of tungsten rod with sharp ends. Usually, it is made of high-density tungsten metal so that it can be widely used in many fields. For its production, it adopts powder metallurgy, but this method is not enough when very sharp tips are required. As one of the core components of the field emission electron microscope, the performance of the field emission electron source determines the main electron optical performance param， ，eters in the field emission…

Tungsten News
How to Produce High-precision Tungsten Foil? 143

Heat shields, heating elements and vacuum furnace supports are made of tungsten foil. The foil is thin and is ideal for embedding in laminates, other metals and glass; it is made of mental tungsten and can be used in high temperature vacuum furnaces, coatings, electronic and semiconductor components. How to produce the thin foil? Compared with the coating deposition method, the rolling method is more suitable for the production of tungsten foil, mainly due to the advantages of higher hardness,…

Tungsten News
The Differences Between Cerium Tungsten Electrode and Thorium Tungsten Electrode 166

With the continuous development of science and technology such as welding, cutting and spraying technology, manufacturers have higher and higher requirements for tungsten electrodes, such as easy arc starting, stable arc column and long service life. In order to improve the deficiencies of pure tungsten electrodes, researchers often add an appropriate amount of modifiers such as cerium oxide (CeO2) or thorium oxide in the production process, and the prepared products are naturally called corresponding electrodes such as cerium tungsten electrode…

Tungsten News
A New Production Method to Make Tungsten Target 174

Tungsten target, also known as tungsten sputtering target, is a typical pure tungsten product with high purity, high melting point, high density, high deflection strength, good thermochemical stability, low resistance, non-toxic and non-radioactive characteristics. It is widely used in flat panel displays, solar cells, integrated circuits, automotive glass, medical equipment and other industries. The researcher with the patent number CN102513789A provides a method for producing it and steps are as follows: Provide target blanks; machine the surface of the blanks;…

Tungsten News
Tungsten Needles and Tungsten Rhenium Needles Used in the Construction of Probe Cards 207

Tungsten needle, also named tungsten pin, mainly refer to thin tungsten rod or thin tungsten rod with sharp tip. Their properties are basically the same, but uses are different. Mostly, their diameters are usually below 2mm and lengths range from 15mm to 100mm. For thin tungsten rod, it is mainly used as an electrode for argon arc welding. During welding, an arc will be generated between the tungsten electrode and the workpiece, and under the action of the arc heat,…

Tungsten News
Tungsten foil for Electric light Source Parts and Electric Vacuum Devices 194

Tungsten foil is a kind of thin tungsten sheet with thinner thickness of 0.05mm to 0.3mm and more narrow width of 50mm to 400mm. With more than 99.95% purity, it owns excellent thermal, mechanical, chemical and electrical properties, and is widely used in many fields. Regarding its physical and chemical properties, it is a silver-gray metal sheet with metallic luster, with a melting point of about 3410 °C, a boiling point of about 5660 °C, a relative density of 19.35g/cm3,…

Tungsten News
Non-sag Tungsten Wire Replaces High Carbon Steel Wire as Base Material of Diamond Wire Saw 182

Diamond wire saw, also known as diamond wire, refers to a cutting wire that uses electroplating process or resin bonding method to fix diamond abrasive on metal wire. It is mainly used to cut high hard and brittle materials such as single crystal silicon, polycrystalline silicon, sapphire, magnetic materials and cemented carbide, etc. Compared with free abrasive wire saws, it has the advantages of higher processing efficiency, lower energy consumption, and better cutting quality; compared with circular saws and band…

Tungsten News
Why Fine Tungsten Wire Can Be Used for Window Heating? 140

Tungsten is the most widely used refractory metal with up to 3410℃ melting point. It also has good electrical and thermal conductivity under the conditions of low thermal expansion, low vapor pressure and high temperature, so tungsten is widely used to make filaments of various incandescent lamps and tungsten halogen lamps and electrodes of gas discharge lamps. In addition, tungsten wire can be used as a heating material for high temperature furnaces, heating elements for electronic tubes and reinforcing ribs…

Tungsten News
Types of JEOL’s EB Tungsten Filament 192

What Is JEOL’s EB Tungsten Filament？ Evaporation source materials used for vapor deposition require excellent electrical conductivity, high melting point and low vapor pressure. Therefore, many vapor deposition accessories are made of tungsten. Filaments/heaters made of tungsten have the characteristics of high melting point, low thermal expansion coefficient, good corrosion resistance and long evaporation life. Japan Electron Optical Laboratory is the full name of JEOL. After decades of exploration and research by the world’s top scientific instrument manufacturers, they created…

Tungsten News
Will Molybdenum Plates Replace Graphene in the Electronics Industry? 166

Molybdenum is the most widely used materials in the processing industry. It can be used in the iron and steel industry, most of which are industrial molybdenum oxide briquette directly used for steelmaking or cast iron, a small part is smelted into ferromolybdenum and then used in steelmaking, or synthesized with other metals to make molybdenum plates. Plates made of molybdenum or molybdenum alloy can improve the corrosion resistance, strength and wear resistance of the original metal. With the characteristics…

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