Will the tungsten wire mesh react with air?
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Tungsten wire mesh is a pure tungsten wire product. It has the characteristics of high melting point, high hardness, high strength, high electrical resistivity, low vapor pressure, low evaporation rate, good high temperature resistance (withstand high temperature of 3400 degrees), and excellent impact resistance. Therefore, it is widely used in various mechanical equipment, such as electromagnetic shielding net, vacuum furnace heat treatment grid, radio frequency electromagnetic shielding, light wave filtering, etc. Will the tungsten wire mesh react with air? In this article, we will try to answer the above questions.
Will the tungsten wire mesh react with air?
Under normal circumstances, tungsten wire mesh is a product with very good physical and chemical stability and will not react with air or oxygen. But when heated in the air, the color of the tungsten wire mesh begins to change from steel gray or silver white to dark gray black. When the temperature rises to 400°C, tungsten begins to oxidize. As the temperature rises, the oxidation reaction becomes more and more intense, and tungsten trioxide is gradually formed.
Tungsten trioxide is a kind of light yellow orthorhombic crystalline powder.
Chemical formula WO3, specific gravity 7.16g/cm3, melting point 1473°C, boiling point 1750°C. It sublimates significantly when the temperature is 850℃, and the color deepens as the temperature rises, and it turns green when it melts.
In addition to the color change of tungsten trioxide with temperature, the crystal structure also depends on temperature. WO3 is a tetragonal system above 740°C, an orthorhombic system at 330-740°C, a monoclinic system at 17-330°C, and a triclinic system at -50-17°C.
In addition, it is worth noting that if the tungsten wire mesh is continuously heated in an oxygen environment, its toughness will become worse and its brittleness will become greater and greater. It is easy to break under impact or vibration.
However, even under the high temperature in vacuum, the tungsten wire mesh can still maintain the characteristics of tungsten, that is, the melting point is high, and the melting time mainly depends on the evaporation rate of tungsten, so it is not easy to break.
in conclusion
Thank you for reading our article, hope it can help you better understand the tungsten wire mesh. If you want to learn more about tungsten or other refractory metals, we recommend that you visit Advanced Refractory Metals (ARM) for more information.
Anping county Tengde metal wire mesh products co.,ltd . is a manufactory with 20 years experience on productions and research and development. Our main products includ Tungsten Wire Mesh, stainless steel wire mesh, wire mesh production series ,filter and filter material. We also provide customization service. We can produce special-shaped wire mesh and wire mesh further processing as your demand. Our products are all passed strict inspection to ensure that the products are absolutely qualified .If you have more questions about tungsten wire mesh, please contact us, we will be happy to answer and serve you!