The mobile phone case mentioned here does not refer to the mobile phone protective case purchased daily, but the physical material of the mobile phone itself. Today, mobile phones have various shapes and novel designs, which are inseparable from material science. Let's take a look at the types of materials used in mobile phone products.

Ordinary engineering plastics

Engineering plastics are widely used. Engineering plastics refer to industrial plastics used as industrial parts or shell materials, which have excellent strength, impact resistance, heat resistance, hardness and aging resistance. The Japanese industry defines it as "a high-performance plastic that can be used for construction and mechanical parts. Its heat resistance is above 100 ℃, and it is mainly used in industry". The common types are PC, ABS, nylon, alum, etc.

The ordinary project cost is low, and it is widely used in the manufacturing industry. A large part of traditional mobile phones use this material. However, due to the diversity of engineering plastics materials, they are engineering plastics, and different kinds of materials have different effects when used.

Kevlar material

Kevlar is a kind of aramid composite material, which has the characteristics of low density, high strength, good toughness, high temperature resistance, easy processing and molding, and has attracted people's attention. The tensile strength of Kevlar can reach 5 times of the steel wire with the same diameter. Kevlar material is mainly used for ultra-high strength and ultra-high modulus fiber, and can also be used as high strength and high modulus composite plastic reinforcement material for spacecraft, missile shells, etc. Kevlar is called "armored guard" militarily because of its tenacity, abrasion resistance, hardness and flexibility, and special ability that can not be captured by a knife.

Motorola blade XT910 is made of Kevlar material, which not only has excellent hand feel, but also is very wear-resistant, protecting the body from damage.

Carbon fiber material

Carbon fiber is a microcrystalline graphite material obtained by carbonization and graphitization of organic fiber. Carbon fiber not only has the inherent characteristics of carbon materials, but also has the soft processability of textile fibers. It is a new generation of reinforcement fibers. Carbon fiber has excellent mechanical properties, its proportion is less than 1/4 of steel, and its tensile strength is 7~9 times of steel. Carbon fiber products have been increasingly favored by customers. The application field has gradually changed from the original high-end aerospace, mechanical military industry to the daily use of sports equipment, medical equipment and decorative products, and the use range is growing.

The Nokia 8800ca is made of carbon fiber. 8800ca adopts a sliding cover design. The whole machine has a good texture in the use process, and the carbon fiber body is also the reason for its high price.

Titanium alloy materials

Titanium is an important structural metal developed in the 1950s. Titanium alloys are widely used in various fields because of their high strength, good corrosion resistance and high heat resistance. Many countries in the world have realized the importance of titanium alloy materials, have carried out research and development on them, and have been applied in practice.

Regal Titanium mobile phone released by luxury mobile phone manufacturer Gresso is made of titanium alloy. This mobile phone can withstand a certain degree of impact without leaving traces. Its titanium alloy shell has anti-corrosion function, and can also cope with the environment with high salinity, sunlight exposure and high humidity. Moreover, the 130g fuselage is not heavy, just a little heavier than the iPhone 5.

Aluminum magnesium alloy material

The main element of aluminum magnesium alloy is aluminum, and a small amount of magnesium or other metal materials are added to strengthen its hardness. Aluminum magnesium alloy is light in weight, low in density, good in heat dissipation and compression resistance. Its hardness is several times that of traditional plastic casing, but its weight is only one third of that of the latter. The silver white magnesium aluminum alloy shell can make the product more luxurious, beautiful, and easy to color. It can become personalized pink and pink through surface treatment, which is incomparable to engineering plastics and carbon fiber.

Sony LT28h is made of aluminum magnesium alloy. Benefiting from the advantages of materials, this machine is superior to LT26i and other plastic models in hand feel, and the whole machine looks superior.

ceramic material

Ceramic materials are mostly oxides, nitrides, borides and carbides. Common ceramic materials include clay, alumina, kaolin, etc. Ceramic materials generally have high hardness, but poor plasticity. In addition to the use of food utensils and decorations, it also plays an important role in the development of science and technology. Ceramic raw materials are made from a large amount of earth's original resources clay after quenching.

At present, ceramic materials have been used on mobile phones. This design integrates ceramic cultural elements such as blue and white, pastel, etc. into mobile phones. The shell of the ceramic mobile phone is made of nano ceramic materials and fired at a high temperature of more than 1300 degrees. It is combined with electronic components to better show the porcelain culture.

In addition, it was rumored that the Samsung Galaxy S3 would use a ceramic back cover, but it was not realized in the end.

Future technology: liquid metal

It was rumored that liquid metal would be used on iPhone 5, but it was not used after the launch of the new product, but this did not prevent users from paying attention to liquid metal. Liquid metal is the trade name of a new type of metal alloy, which has a unique atomic structure similar to glass. Liquid metal has the characteristics of toughness, scratch resistance, corrosion resistance and recoverability. It can be accurately cut into various complex shapes. Its products will be greatly improved in toughness and appearance.

At present, Apple has an exclusive patent for liquid metal technology, which has been applied to the iPhone pin.