Why Alumina Ceramic Bulletproof Sheet Is Popular
As an important component of the bulletproof field, ceramic bulletproof has many special advantages that metals do not have. Ceramic bulletproof materials rely on their high specific stiffness, high specific strength, and chemical inertness in many environments. Its advantage over metal lies in that metal materials produce plastic deformation and absorb energy when resisting bullet impact, while ceramics hardly produce plastic deformation, and rely on their strong and high hardness characteristics to passivate or even break the bullet. Ceramic surface crushing also absorbs the energy of high-speed bullet during the formation of small and hard fragments, resulting in excellent bulletproof effects.
Among bulletproof ceramics, the more common bulletproof materials include aluminum oxide, silicon carbide, boron carbide, etc. However, among these materials, aluminum oxide ceramics are favored. Why is this?
Cheap price: Alumina bulletproof ceramics are slightly more expensive than metal bulletproof materials, but their performance is far superior to metal materials. Compared to silicon carbide and boron carbide, their price is very cheap. Taking into account the cost, stiffness, and strength of various materials, and ensuring that their bulletproof performance meets specified requirements, the cost is as low as possible, which is an important reason for the popularity of alumina bulletproof ceramics.
Strong bulletproof ability: The main component of aluminum oxide ceramics is aluminum oxide, which has stable chemical properties and extremely high hardness, and will not degrade its performance under high temperatures, oxidation, and other conditions. It can also smash warheads with extremely high hardness, absorb warhead energy, and achieve bulletproof purposes. The bulletproof level reaches the American Standard Level 4, which can meet most bulletproof requirements.
Lightweight: With the same area, the mass of aluminum oxide bulletproof ceramics is more than 50% lighter than that of metal bulletproof materials, which greatly reduces the load on soldiers and armored vehicles.
Multiple types available: There are various types of aluminum oxide bulletproof ceramics, such as 85, 88, 90, 92, 95, and 99, with different prices and performance, and multiple options.
The aluminum oxide process is simple and mature, with good product stability: Compared to materials such as silicon carbide and boron carbide, the aluminum oxide processing process is relatively simple and mature, and the performance and size of the aluminum oxide bulletproof sheet are more stable.
The material selection of bulletproof sheets is a process of comprehensive consideration of various factors. In the comprehensive comparison of the above factors, aluminum oxide ceramic bulletproof sheets have become an ideal choice in many civil bulletproof fields.
Alumina ceramic materials have a high hardness, with a Rockwell hardness of HRA80-90, which is second only to diamond and far exceeds the wear resistance of wear-resistant steel and stainless steel. Aluminum oxide, silicon carbide, and boron carbide are relatively hard to cut with ordinary cutting tools. It is appropriate to use tools containing diamonds for cutting.
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