Near Defense Shell is a very common air defense weapon on modern ships, which is mainly used to intercept incoming anti-ship missiles and fighters. Tungsten Alloy Armor Piercing Projectile relies on the kinetic energy of tungsten alloy core to penetrate armor and destroy targets. Because of its high initial speed, long direct distance and high shooting accuracy, it has become one of the Near Defense Shell.

Tungsten Trioxide is an oxide of tungsten and an important industrial raw material, which is widely used in many fields because of its good properties. For example, in the military field, it is often used as an important invisible material because of its strong ability to absorb electromagnetic waves. At present, there are several methods to prepare Tungsten Trioxide, among which sol-gel method, which has the advantages of simple process, less environmental pollution, less corrosion to equipment and relatively low production cost, is more popular.

Tungsten Alloy Armor Piercing Projectiles rely on the action of high-temperature and high-pressure gas in the bore to obtain great initial kinetic energy to penetrate tank armor and destroy its internal system.

Tungsten Alloy is often used in harsh environments because of its high density, strength, good plasticity and hardness, such as bullets in military fields, prefabricated fragments of tungsten alloy, kinetic energy armor-piercing projectiles and so on.