The electrical conductivity of tungsten paste is mainly determined by the following factors:

1. Tungsten powder content and properties：The tungsten powder in the tungsten paste is the main component for conducting electricity. The higher the content of tungsten powder, the better the electrical conductivity usually is. At the same time, the particle size, shape and purity of the tungsten powder also affect the electrical conductivity. Uniform particle size, regular shape and high purity tungsten powder are conducive to forming a better conductive network.
2. Inorganic bonding phase and organic carrier：The types and contents of inorganic bonding phases and organic carriers also affect the electrical conductivity of the tungsten slurry. They need to be well-matched with the tungsten powder to ensure that the tungsten slurry can form a dense conductive layer after sintering.
3. Sintering process：The process parameters such as sintering temperature, time and atmosphere have significant effects on the electrical conductivity of tungsten slurry. Appropriate sintering procedures can enable good contact between tungsten powder particles, thereby enhancing the electrical conductivity.
4. Impurities and defects：Impurities and defects in the tungsten slurry will reduce its electrical conductivity. Therefore, during the preparation of the tungsten slurry, the purity of the raw materials and the preparation process need to be strictly controlled to minimize the occurrence of impurities and defects.
5. Work environment：The electrical conductivity of tungsten paste may also be affected by the working environment, such as temperature and humidity. At high temperatures, the resistivity of the tungsten paste may slightly increase, but it can still maintain good electrical conductivity within a certain range. At the same time, humidity may also have an impact on the electrical conductivity of the tungsten paste, as tungsten has a certain degree of hygroscopicity. Changes in humidity may lead to changes in its electrical conductivity.

In conclusion, the electrical conductivity of tungsten paste is the result of the combined effect of various factors, and it requires consideration and optimization from multiple aspects.