Physical Properties of Tungsten Wire for Glass Heating

Tungsten wire is an ideal choice for glass heating due to its physical properties such as high melting point, low thermal expansion coefficient, high mechanical strength, good thermal conductivity and chemical stability. These properties not only ensure the efficiency and uniformity of the heating process, but also extend the service life of the tungsten wire and reduce potential damage to the glass.

1. High Melting Point

Tungsten wire has an extremely high melting point of about 3422°C. This property enables it to work stably in high temperature environments and is very suitable for high temperature heating required for glass processing.

2. Resistivity Changes with Temperature

The resistivity of tungsten wire increases with increasing temperature. This property helps to achieve uniform heating, avoid local overheating, and ensure that the glass is heated uniformly.

3. Low Thermal Expansion Coefficient

Tungsten wire has a low thermal expansion coefficient and is like that of glass. This matching reduces the thermal stress caused by thermal expansion differences during heating, thereby reducing the risk of glass breakage.

4. High Mechanical Strength

Tungsten wire has high mechanical strength, can withstand stress at high temperature, is not easy to deform or break, and ensures the stability of the heating process.

5. Good Thermal Conductivity

Tungsten wire has high thermal conductivity, which can quickly transfer heat, so that the glass can quickly reach the required temperature and improve heating efficiency.

6. Chemical Stability

Tungsten wire has good chemical stability at high temperature, is not easy to react chemically with glass, and avoids material contamination or performance degradation during heating.

7. Low Heat Capacity

Tungsten wire has low specific heat capacity and small heat capacity, which means that it can heat up quickly and respond to temperature changes, which is convenient for precise control of the heating process.

8. High Density

Tungsten wire has high density (19.25 g/cm³), which can provide large heating power in a small volume, and is suitable for glass processing scenarios that require efficient heating.

9. Oxidation Resistance and Corrosion Resistance

Tungsten wire has good oxidation resistance and corrosion resistance at high temperature, and can be used for a long time in harsh environments without aging.

10. Resistance Stability

Tungsten wire has good resistance stability, and is not prone to performance degradation after long-term use, and can maintain a stable heating effect.

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