It is understood that zirconia ceramics is a new type of high-tech ceramics. In addition to the high strength, hardness, high temperature resistance, acid and alkali corrosion resistance and high chemical stability of precision ceramics, it also has higher toughness than ordinary ceramics, making zirconia ceramics also used in various industries, such as shaft seal bearings, cutting components, molds, automobile parts, and even for human body Like in an artificial joint.

In the field of consumer electronics, zirconia ceramics are favored by fingerprint recognition module patches and mobile phone backbones because of its hardness close to sapphire, but its total cost is less than 1 / 4 of sapphire, its refractive index is higher than glass and sapphire, its dielectric constant is between 30-46, and it is non-conductive and will not shield the signal.

1、 From the point of view of chemical properties: zirconia ceramics show inert, acid and alkali resistant, non aging, far more than plastic and metal.
2、 From the perspective of communication performance: the dielectric constant of zirconia is three times that of sapphire, the signal is more sensitive, and it is more suitable for fingerprint identification patches. From the perspective of shielding effectiveness, zirconia ceramic as a non-metallic material has no shielding effect on the electromagnetic signal, does not affect the internal antenna layout, and can be easily integrated.
3、 From the point of view of the physical properties of ceramics, it has strong vitality as an electronic structure. Especially for zirconia ceramics, it has been proved to be an excellent structural material in many fields, such as optical communication, industry, medical treatment and so on. Its entry into the field of consumer electronics is the result of its cost reduction and brittleness improvement. In terms of hardness, the Mohr's hardness of zirconia ceramics is about 8.5, which is very close to that of sapphire 9. The Mohr's hardness of polycarbonate is only 3.0, that of tempered glass is 5.5, that of aluminum magnesium alloy is 6.0, and that of Corning Glass is 7.