What are the physical properties of lithium disilicate glass ceramics

The physical properties of lithium disilicate glass ceramics are quite excellent, which is reflected in the following aspects:

First, high mechanical properties

Strength and hardness: Lithium disilicate glass ceramics have excellent bending strength and hardness, and can withstand greater pressure and impact. Its strength is usually between 300 and 400MPa, and its elastic modulus is about 95GPa.

Wear resistance: The material has excellent wear resistance and can maintain a long service life in harsh environments.

Second, excellent heat resistance

Coefficient of thermal expansion: The coefficient of thermal expansion of lithium disilicate glass ceramics is close to that of metal, which makes it maintain stable performance under high temperature environment.

High temperature resistance: the material can withstand high temperature, sintering temperature reached 900℃ or more can still maintain a stable form, no deformation and thermal cracking.

Third, good insulation performance

Electrical insulation: Lithium disilicate glass ceramics have excellent electrical insulation properties and can withstand voltages up to 400V, which makes it widely used in electronic devices and other fields.

Fourth, optical performance

Light transmittance: The light transmittance of lithium disilicate glass ceramics is as high as 90%, which is more transparent than ordinary ceramics. Its optical properties are similar to natural teeth, with good semi-permeability and layering, and natural color.

Fifth, biocompatibility

Biocompatibility: Lithium disilicate glass ceramics have good biocompatibility and are non-toxic and harmless to human tissues, so they are widely used in medical fields, such as dental repair materials.

Sixth, other physical properties

Machinability: The material has good machinability and can be processed and formed by mechanical processing, hot pressing and other ways.

Density and weight: The relative density of lithium disilicate glass ceramics is high, but the specific weight will vary according to the specific formulation and processing method of the material.

Seventh, application field

Electronics industry: Because of its good electrical insulation properties, high temperature stability and corrosion resistance, it is widely used in the manufacture of electronic parts.

Medical devices: Because of its good biocompatibility, high chemical stability, good wear resistance, it is widely used in artificial joints, artificial teeth, cochlear and other medical devices.

Radio communication: Because of its excellent heat resistance and good mechanical properties, it is widely used in microwave technology, terahertz technology and other radio communication fields.

Dental repair: Lithium disilicate glass ceramics are widely used in clinical practice because of their outstanding aesthetic characteristics, good biocompatibility, excellent mechanical properties and mature die casting process, and are increasingly used in the repair of veneers, inlays, onlays, single crowns, three-unit fixed Bridges, and implant abasements and restorations.

In summary, lithium disilicate glass ceramics have excellent physical properties, which make it have a wide range of application prospects in many fields.