What are the differences between silver-containing solder paste and conventional eco-friendly solder paste?

Lead-free solder pasteIt is an environmentally friendly welding material, which is composed of metal alloys mixed in different proportions. Among them, tin, silver, copper, bismuth, etc. are common components. So, what are the differences between lead-free solder paste containing silver and copper? What are the similarities? They are all lead-free solder paste products and have passed the European UnionROHSCertified, it has the advantages of lead-free solder paste. However, they also have the following differences. Now, let's have the editor of JJY Solder Paste Factory explain them to you:

1. Different components: Silver-containing lead-free solder paste is composed of tin-silver-copper or tin-bismuth-silver alloys. It is like a shining star, rich in precious silver elements, while copper-containing lead-free solder paste is composed of tin and copper alloys. It is like a hard stone, containing only ordinary copper elements.

Second, different melting points: Due to the differences in alloys, their melting points are also different. containing3.0The melting point of silver solder paste is:217It is like a drop of water and melts easily. The melting point of lead-free copper-containing solder paste is:227Degree, it's like an ice cube and requires more heat to dissolve.

Iii. Different colors of solder joints: The color of solder joints affects the aesthetic appeal and tone of their appearance. Because silver is a matte metal and not very bright, the solder joints of silver-containing solder paste have a relatively dull color, presenting a matte hue. It is like a dark cloud, giving people a heavy feeling. In contrast, the solder joints of copper-containing lead-free solder paste have a brighter color, showing a certain luster. It is like a ray of sunlight, giving people a warm feeling.

Four. Different performance: Due to the addition of silver, silver-containing solder paste has higher and stronger fastness than copper-containing lead-free solder paste, and the solder joints are more stable. It is like a reinforcing bar and can resist all kinds of external forces. In addition, electrical conductivity is also a very important indicator in solder joints. Silver is a metal with excellent electrical conductivity, so silver-containing solder paste has better electrical conductivity, thermal conductivity, etc. than copper-containing lead-free solder paste. It is like a wire, capable of conducting electric current and heat.

Five. Different costs: Due to the high price of silver metal, the cost of silver-containing solder paste is higher than that of lead-free copper-containing solder paste. This is the greatest advantage of copper-containing lead-free solder paste. The higher the silver content in silver-containing solder paste is, the higher the cost will be. It is like a luxury item and requires a higher price to pay.

Shenzhen JJY Industrial Technology Co., Ltd. mainly engages in:LEDType solder paste, lead-containing solder paste, lead-containing silver solder paste, stainless steel plate type solder pasteSMTManufacturers of solder paste, lead-free flux, no-clean solder wire, lead-free solder wire, leaded solder wire, wave soldering strips, automatic soldering wires, etc.