With the official release of Xiaomi's all-ceramic mobile phone MIX, the zirconia all-ceramic body has attracted widespread public attention. Xiaomi MIX not only uses ceramic on the back cover, but also ceramics on the bezel, which fully verifies the excellent performance of ceramics and announces the era of ceramic integrated mobile phone body.
5G communication uses a wireless spectrum above 3 GHz, and the antenna structure will be more complicated than 4G. The existing antenna layout structure cannot meet the needs of 5G. Therefore, in the 5G era, smartphones will abandon the existing metal back cover for signal shielding and use non-metal materials instead.
Comparison of non-metal materials:
There are two solutions of ceramic back cover and glass back cover in non-metallic materials. The dielectric constant of the zirconia ceramic back cover is 3 times that of sapphire and 10 times that of tempered glass, and the signal penetration is good. At the same time, ceramics can also be doped with some rare metals to make them more resistant to drop than glass. In addition, ceramics are superior to glass in terms of color brightness and touch.
At the previous conference of ceramic materials for mobile phones of the third ring, engineers also used data to prove some of the excellent properties of zirconia ceramics: the bending strength is twice that of glass, the fracture toughness is 10 times that of glass, and the elastic modulus is 2.5 times that of glass Times, the dielectric loss is only 1/20 of that of glass, and it has abrasion resistance that glass cannot match.
The excellent performance of zirconia ceramics has been recognized by many mobile phone manufacturers, such as Xiaomi, Huawei, OnePlus, Apple, OPPO, VIVO, Samsung, etc. have ceramic solutions.
In addition, the toughness of the chemical zirconia ceramic structural parts is very good, which overcomes the inherent brittleness, higher wear resistance of the ceramic itself, the product life is greatly extended, the paper quality is significantly improved, and it is also suitable for fingerprint identification (just needed) .
At the time of production, zirconia ceramics can be directly prepared by processes such as casting, which is not only simple, but also can greatly improve work efficiency and productivity. The color and texture of jade can also be provided by color matching. The color can be changed. In addition to the back panel of the mobile phone, it can also be used in consumer electronics to improve the grade.