The variation law of conductivity of printed silver paste at different temperatures

Printing silver paste, as a high-performance conductive material, is widely used in electronic devices, communication equipment, and industrial applications. The variation of its conductivity at different temperatures is of great significance for the practical application of materials. This article will explore this changing pattern and use the technology produced by Advanced Institute (Shenzhen) Technology Co., LtdResearch Platinum Brand YB8604 Line Printing Silver PasteProvide a detailed analysis as an example.

1、 Introduction

Printed silver paste circuits have excellent conductivity, reliability, and flexibility, and can be applied to PCB substrates through printing, brushing, or spraying to form the required circuit connections. High conductivity can effectively transmit electronic signals, reduce the resistance of the circuit, and thus improve the performance of the equipment. YB8604 line printing silver paste, as one of the outstanding products, has excellent printing performance and conductivity.

2、 The relationship between conductivity and temperature

The conductivity of printed silver paste shows a significant variation pattern at different temperatures. This change is mainly influenced by factors such as softening of glass powder in the silver paste, changes in porosity, and the state of silver particles.

1. Below 700 ℃:
   When the heat treatment temperature is below 700 ℃, there is no significant change in conductivity between silver slurries with different solid content (30wt.%~70wt.%). At this point, the glass powder in the slurry has not yet softened, with a high porosity and more electron scattering centers, resulting in relatively low electrical conductivity.

2. 700 ℃ to 800 ℃:
   When the heat treatment temperature is increased to 700 ℃, the glass powder in the silver paste begins to soften, and the liquid glass powder promotes the densification of the silver paste, resulting in a significant decrease in the porosity of the paste. As the temperature further increases, when it reaches 800 ℃, the porosity of the silver paste reaches its lowest value, and the conductivity rapidly increases from the order of 107. This is because the decrease in porosity reduces the number of electron scattering centers, thereby increasing conductivity.

3. Above 800 ℃:
   When the heat treatment temperature is further increased to 900 ℃, the solid content is 60wt.% There is no significant difference in the porosity of the silver paste above. At this point, the heat treatment temperature is close to the melting point of silver, and the particle size is smallerNano silver powderIt has gradually softened, further promoting the sintering and densification of silver paste. However, excessively high temperatures may cause phenomena such as silver particle growth, sintering shrinkage, and grain coarsening, which have adverse effects on electrical resistivity.

3、 Characteristics of YB8604 line printing silver paste from Yanbo brand

Produced by Advanced Institute (Shenzhen) Technology Co., LtdResearch Platinum Brand YB8604 Line Printing Silver PasteHas the following significant characteristics:

1. High conductivity:
   The conductivity of YB8604 silver paste is higher than that of ordinary silver alloy conductive silver paste, and close to the level of pure silver conductive silver paste, ensuring good conductivity.

2. Moderate viscosity:
   The viscosity of YB8604 silver paste is moderate, which can meet the requirements of high-precision screen printing. The printed pattern is uniform, without obvious flowing or collapsing phenomena.

3. Excellent mechanical performance:
   YB8604 silver paste has high tensile strength, strong adhesion to the substrate, and is not easily peeled off; Moderate hardness, good wear resistance, and not easily scratched.

4. High thermal conductivity and heat resistance:
   YB8604 silver paste has high thermal conductivity, good heat dissipation performance, and good heat resistance, which can maintain stable performance in high temperature environments.

4、 Conclusion

The conductivity of printed silver paste shows a significant variation pattern at different temperatures. As the temperature increases, the conductivity gradually increases and reaches its maximum value within a certain temperature range. However, excessively high temperatures may have adverse effects on the performance of silver paste. Therefore, in practical applications, it is necessary to choose the appropriate heat treatment temperature according to specific needs to optimize the conductivity of silver paste.

Advanced Institute (Shenzhen) Technology Co., LtdThe YB8604 line printing silver paste produced by Yanbo brand has achieved excellent printing performance and conductivity through a reasonable organic carrier formula, providing strong support for the development of the electronics industry.

The above data is for reference only, and specific performance may vary due to production processes and product specifications.