Why do many notebook computers use aluminum oxide plates as casings?

Many notebook computers use alumina plates as their casings, mainly based on the following considerations:

Balance between thinness and strength: Notebooks need to find a balance between portability and ruggedness. Alumina board has low density and relatively light weight, which helps to reduce the overall weight of notebook computers and is convenient for users to carry. At the same time, it has high strength and hardness, can withstand certain external impact and pressure, protect internal precision parts, and reduce the risk of damage caused by collision and extrusion.

Excellent heat dissipation ability: A notebook computer will generate a lot of heat during operation, and the heat dissipation problem directly affects its performance and stability. Alumina has good thermal conductivity, which can quickly conduct the heat generated by internal components to the surface of the shell, and then dissipate it through air convection, effectively reducing the internal temperature of the computer, avoiding the problems of performance degradation and crash caused by overheating, and prolonging the service life of the computer.

Good appearance texture: Alumina board can obtain different appearance effects through various surface treatment processes, such as anodizing, wire drawing and polishing. These treatments can not only give the notebook computer shell a metallic luster and delicate texture, but also improve the overall aesthetics and quality of the product, and also meet the individual needs of different users for appearance, making the product more attractive in the market.

Good corrosion resistance: notebook computers may be exposed to various environmental factors in daily use, such as water vapor, oxygen and some chemicals in the air. The alumina film on the surface of alumina board has good corrosion resistance, which can effectively resist the corrosion of these substances, prevent the shell from rusting and corrosion, and maintain the integrity and aesthetics of the appearance, so that the notebook computer can still maintain a good appearance after long-term use.

Electromagnetic shielding performance: the electronic components inside the notebook computer will generate electromagnetic waves when working, which may interfere with other equipment and may also affect the performance of the computer itself. Alumina plate has a certain shielding effect on electromagnetic waves, which can effectively reduce electromagnetic interference, improve the electromagnetic compatibility of equipment, ensure the stable operation of computers, and also meet the relevant electromagnetic radiation safety standards.

Easy to process and shape: Alumina plate has good plasticity and machinability, and can be made into various shapes and structures of notebook computer shells through various processing technologies such as stamping, stretching and bending, so as to meet different design requirements and realize diversified product shape design. In addition, the alumina plate is convenient for subsequent surface treatment and assembly process, which improves production efficiency and product quality.