Gold has very good ductility. 1 gram of gold can be drawn into a 160-meter-long gold wire, or it can be ground into a gold foil with an area of ??9 square meters, with a thickness of only 1/500,000 centimeters. This gold foil looks almost transparent but blocks the passage of ultraviolet rays.

Gold foil is widely used in astronauts' protective masks and spacecraft sealed cabins. Gold foil can also strongly reflect infrared rays and is used in the manufacture of infrared drying equipment and infrared detectors for modern military equipment. ?

As the saying goes, real gold is not afraid of fire. Gold can withstand very high temperatures and has a melting point of 1064.43 degrees Celsius. The chemical properties of gold are very inactive, and ordinary acids and alkalis have no effect on it.

Many control instruments and electrical switch contacts in aircraft, satellites and aerospace equipment must be made of gold or its alloys with good conductivity, high melting point and will not be oxidized. Generally, gold is used Gold and its alloys. Gold and its alloys have good chemical stability and can also be used to make man-made fiber spinnerets and battery filter membranes in aerospace vehicles, as well as battery filter membranes in aerospace vehicles. Memory alloys, superconducting materials and various parts made of gold and its alloys. In addition, memory alloys, superconducting materials and various parts made of gold and its alloys are also widely used in medical equipment, electronic industry, computers, robots, aerospace, military industry and other new technology fields.