The electrical conductivity of conductive adhesives does indeed change under different temperatures, and this change is influenced by various factors, such as the composition and structure of the conductive adhesive, as well as external environmental conditions. The following is a detailed analysis of the changes in the electrical conductivity of conductive adhesives under different temperatures: 
1. Changes in Conductivity with Increasing Temperature

1. Decrease in resistivity:

As the temperature rises, the contact between the conductive particles within the conductive adhesive may become tighter, thereby reducing the contact resistance and lowering the overall resistivity, resulting in an improved conductive performance.

2. Changes in material structure:

An increase in temperature will also cause the molecular vibrations within the conductive adhesive material to intensify, which may lead to changes in the material structure. These structural changes may affect the movement performance of charge carriers (such as electrons or holes), thereby further influencing the conductive properties. However, this effect is usually complex, and it may either enhance the conductivity or, in some cases, lead to a decrease in conductivity.

3. Thermal expansion effect:

At high temperatures, the conductive adhesive may undergo thermal expansion, causing changes in the spacing between the conductive particles. These changes in spacing may affect the conductive performance, but the specific impact depends on factors such as the distribution, size and shape of the conductive particles.

II. Changes in Conductivity with Decreasing Temperature

1. Increase in resistivity:

When the temperature drops, the contact between the conductive particles within the conductive adhesive may become less tight, resulting in an increase in contact resistance, an increase in overall resistivity, and a decrease in conductive performance.

2. Increase in material stiffness:

At low temperatures, the modulus (i.e., the stiffness) of conductive adhesives may increase, which could affect the flexibility and mechanical stability of the adhesives, and thereby have an indirect impact on the conductive performance. However, this influence is usually not as significant as the direct effect of temperature changes on the resistivity. 
III. Special Phenomena and Consideration Factors

Sintering or oxidation phenomenon:

For certain types of conductive adhesives (such as conductive silver adhesives), during extreme high temperatures, phenomena such as sintering or oxidation may occur. These phenomena can significantly reduce the conductivity, as sintering can cause the connections between conductive particles to become unstable or break, while oxidation forms an insulating layer on the surface of the conductive particles.

2. Temperature stability：

Different types of conductive adhesives have different temperature stabilities. Some conductive adhesives may maintain relatively stable electrical conductivity within a wide temperature range, while others may exhibit significant changes in electrical conductivity within a specific temperature range. Therefore, when choosing conductive adhesives, it is necessary to evaluate and select based on the specific application scenario and working temperature range.

3. Standardized Process：

The curing process also has an impact on the electrical conductivity of conductive adhesives. For instance, medium-temperature cured conductive adhesives usually have better mechanical properties and stability in terms of electrical conductivity, while high-temperature curing may cause metal particles to oxidize and result in a decrease in electrical conductivity. Therefore, during the curing process, it is necessary to control the appropriate temperature and time conditions. 
In conclusion, the electrical conductivity of conductive adhesives is influenced by various factors at different temperatures. To achieve the best stability and reliability of electrical conductivity, it is necessary to select the appropriate conductive adhesive material based on the specific application scenario and working temperature range, and conduct appropriate temperature characteristic tests and evaluations.