Zirconia ceramics for the production of mobile phone backplanes

With the advent of the 5G era, zirconia ceramics have become the new favorite material for mobile phone backplanes.

By the end of 2018, 154 mobile operators around the world are conducting 5G technology testing or testing, and the number of countries participating in 5G has expanded to 66. With the advent of the 5G era, the mobile phone industry will usher in a new round of changes, and the mobile phone backplane market is facing a reshuffle. Among them, zirconia ceramics stand out in a new round of technical reshuffles.

Advantages of zirconia ceramics as raw materials for mobile phone back sheets.

The 5G era requires faster signal transmission, which is 1~100 times that of 4G. 5G communication will use the spectrum above 3Ghz, and the wavelength of the millimeter-wave is shorter. Compared with the metal backplane, the ceramic backplane has no interference to the signal and has unparalleled superior performance of other materials, which is favored by mobile phone manufacturers.

Comparison and difference between several major mobile phone backplane materials.

	plastic	metal	glass	ceramic
Exterior	bad	normal	normal	Great good
Feel	bad
Coloring difficulty	Simple, can do a variety of surface patterns	Normal, prone to paint peeling	Difficult, general film, coating adds texture	Simple, can do a variety of surface patterns
Weight	Thicker and lighter	The thinnest and lightest	Thicker, heavier	Thickness control is generally
Rigidity	Bad, Plastic deformation is obvious	Normal, have a certain plastic deformation	Good, Poor plastic deformability	Good, Small plastic deformation
Brittleness	normal	good	Bad, But still able to meet the drop test	Significant plasticity enhancement after material modification, meeting the drop test
Hardness/wear resistance	bad	normal	normal	Great good
Heat dissipation	bad	good	Very bad	no effect
Cost	lowest	normal	Higher
Electric porcelain shielding	no effect, Integrated molding	Great impact, need to be cut off with plastic	No effect can be integrated

Among all ceramic materials, zirconia ceramics have the advantages of high strength, high hardness, acid and alkali corrosion resistance and high chemical stability, as well as scratch resistance, no signal shielding, excellent heat dissipation performance, good appearance, etc. Features, therefore become a new type of mobile phone body material after plastic, metal, glass. At present, the application of zirconia ceramics in mobile phones is mainly two parts of the backboard and the fingerprint identification cover.