What is the strength of lithium disilicate glass ceramics?

The strength of lithium disilicate glass ceramics is a key physical property, which directly affects the application range and reliability of the material. The following is a detailed analysis of the strength of lithium disilicate glass ceramics:

Intensity range

The strength range of lithium disilicate glass ceramics is relatively wide, which mainly depends on the material preparation process, composition ratio and post-treatment and other factors. According to publicly released information and expertise in the dental field, the strength of lithium disilicate glass ceramics is usually between several hundred megapascals (MPa) and thousands of mpa.

Specific strength value

High strength characteristics: lithium disilicate glass ceramics have high compressive and bending strength, usually reaching more than 800MPa. In some samples prepared under specific processes, the bending strength can even reach more than 400MPa.

Strength in dental applications: In the dental field, lithium disilicate glass ceramics are widely used to make denture veneers, inlays and other restorations. These applications require the material to be strong enough to withstand chewing forces in the mouth. According to professional sources, the strength of dental lithium disilicate glass ceramics is usually between 300MPa and 400MPa, which is enough to withstand the maximum chewing force of ordinary people.

High strength under special process: By optimizing the preparation process and composition ratio, the strength of lithium disilicate glass ceramics can be further improved. For example, some studies have successfully prepared high-strength lithium disilicate glass ceramics by using hot press sintering technology, and its bending strength can reach 354±17 MPa, or even higher.

The influencing factors of strength

The strength of lithium disilicate glass ceramics is affected by a number of factors, including:

Composition ratio: The ratio of crystalline phase and glass phase in lithium disilicate glass ceramics has a significant effect on its strength. The strength of the material can be improved by increasing the content of crystal phase appropriately.

Preparation process: The preparation process also has an important impact on the strength of lithium disilicate glass ceramics. Different sintering temperature, holding time and other process parameters will lead to changes in the microstructure of the material, which will affect its strength.

Post-treatment: Post-treatment processes such as cooling rate, annealing, etc., will also have a certain impact on the strength of lithium disilicate glass ceramics.

conclusion

To sum up, the strength of lithium disilicate glass ceramics is a relatively high value, usually between hundreds of mpa and thousands of mpa. The specific strength value depends on factors such as the preparation process, composition ratio and post-treatment of the material. In practical applications such as the dental field, the strength of lithium disilicate glass ceramics is sufficient to meet the relevant needs.