Gold, as a metal property, is also used in industry. Representative examples are gold wires and gold plating solutions used in electronic parts. In addition, golden teeth in dental treatment are also needed. In addition to investment purposes, gold can also be used as a raw material for jewelry processing. The demand for industrial products accounts for 30% of the total demand for processing.

Gold is relatively stable, soft and easy to process

Briefly introduce the physical properties of gold. The first is stability. From a chemical point of view, gold is very stable. Will not oxidize in air or water. That is to say, gold will not rust, and its glory will last forever. The golden mask of the king of ancient Egypt is still well preserved and shining, all thanks to the stability of gold. If it were replaced by other metals, it would have been corroded long ago and disappeared. Malleability is another characteristic of gold. One gram of gold can stretch for 3000 meters. For example, gold foil makes full use of the soft and ductile properties of gold. The density of gold is 19.3, which is about 20 times that of water. The melting point is 1064 degrees, while the iron is 1535 degrees, and copper is 1084.5 degrees. Relatively speaking, gold is easier to process.

Utilize the material properties of gold to make industrial products

In the industrial field, the figure of gold is commonly seen in gold wire, gold plating solution (potassium cyanide). The gold wire utilizes the ductility of gold to be elongated and stretchable, the stability as a material, and the resistance to electricity is small. The resistance of gold is 2.4, second only to silver, and silver is 1.6, which is easy to conduct electricity. Therefore, it is processed into thin wires (all gold bonding wires), which are used in computer circuits (CPU) or electronic parts. The gold thread made of gold in used computers and mobile phones is called the “urban mine” and is currently attracting a lot of attention.

However, in recent years, the price of gold has soared, and at the same time processing technology has progressed, more and more all-gold bonding wires have been replaced by copper bonding wires. In addition, the added value of the bonding wire itself is low, the production process is simple, and emerging countries participate in the competition, resulting in reduced profits. Japanese companies that once dominated this field are gradually retreating.

Gold plating solution, good conductivity, corrosion resistance, used for conductors or connectors of electronic parts.

In addition, although the amount is negligible, the chemical properties of gold have the following uses. Because it can reflect visible and invisible light very well, it can be used as a protective agent to cover the surface of artificial satellites or transform into a film on the helmet and goggles worn by astronauts when they exit the cabin, effectively preventing ultraviolet rays.

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