Properties of zirconia ceramics

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. , So that zirconia ceramics are also used in various industries, such as shaft seal bearings, cutting components, molds, auto parts, etc., and can even be used in the human body, such as artificial joints.

In the field of consumer electronics, zirconia ceramics have a hardness close to that of sapphire, but the total cost is less than 1/4 of that of sapphire. Its bending resistance is higher than that of glass and sapphire. Its dielectric constant is between 30-46. It is non-conductive and will not be shielded. Signal, so it is favored by fingerprint recognition module patch and mobile phone back panel.

1. From the perspective of chemical properties: Zirconia ceramics are absolutely inert, resistant to acids and alkalis, and are not aging, far exceeding plastics and metals.

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, as a non-metallic material, zirconia ceramics have no shielding effect on electromagnetic signals, and will not affect the internal antenna layout at all, and can be easily integrated into one piece.

3. From the perspective of physical properties: ceramics as a structural component of consumer electronics has strong vitality. Especially for zirconia ceramics, it has been proven to be an extremely excellent structural material in many fields such as optical communications, industry, and medical treatment. Its entry into the consumer electronics field is just a natural result of its cost reduction and brittleness improvement. From the perspective of hardness, the Mohs hardness of zirconia ceramics is about 8.5, which is very close to the Mohs hardness of sapphire 9, while the Mohs hardness of polycarbonate is only 3.0, the Mohs hardness of tempered glass is 5.5, and the Mohs hardness of aluminum-magnesium alloy is only 3.0. 6.0, Corning Glass has a Mohs hardness of 7.