The thermal expansion coefficient of tungsten wire is about 4.5×10^-6/℃. The thermal expansion coefficient refers to the ratio of the change in length, volume or area of an object to the original length, volume or area when the temperature rises by 1℃. Tungsten wire shows good stability in high temperature environment due to its high melting point and good oxidation resistance. At the same time, its small thermal expansion coefficient also makes it advantageous in many applications.
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