As we all know, the application of conductive aluminum paste is very wide. Recently, there are many customers who have consulted conductive aluminum paste. Today, the aluminum paste manufacturer will share with you the composition and sintering dynamics of aluminum paste.
The aluminum paste for crystalline silicon solar back electric field is mainly composed of inorganic glass powder binder, organic resin binder, aluminum powder with different particle sizes and additives. Aluminum powder exists as the main conductive phase of the back field. The various properties of aluminum powder produced by aluminum paste manufacturers have a key impact on the output characteristics of solar cells and the appearance of the back electric field. The organic carrier is to disperse metal powder, glass powder as a high-temperature binder, and other solid powders into a paste fluid to facilitate the printing of the paste on the substrate by a printing method. In this case, aluminum paste manufacturers have The following suggestions should be made upon request:
1. The organic carriers should be inert substances and do not react with each other;
2. The main function of the organic carrier is to disperse the powder, and the surface tension of the contact surface between it and the powder is required to be small to ensure good wetting ability;
3. With proper volatility, the organic carrier should have a low vapor pressure at low temperature, and should be easy to volatilize at a certain temperature, and it can volatilize quickly at high temperature to avoid secondary flow of slurry;
4. With proper fluidity, the carrier and solid powder can provide a flocculent structure when combined to form a plastic flow type thixotropic system. The viscosity should be moderate and adjustable;
5. The organic carrier should not have a fixed boiling point, it can be gradually gasified and burned during heating, and the ash content should be as little as possible.
For more questions about shielding aluminum paste and conductive aluminum paste, please contact the aluminum paste manufacturer, we will have professional technical guidance and give you a full set of solutions.