The strength of zirconia porcelain block is introduced?

Zirconia porcelain has been widely used in many fields because of its excellent strength characteristics. The following is a detailed introduction to the strength of zirconia porcelain blocks:

First, high strength characteristics

Bending strength: The bending strength of zirconia ceramics is extremely high, which can usually reach more than 1000MPa or even higher. This means that it can maintain the stability of the structure when it is subjected to bending loads, and it is not easy to break.

Compressive strength: In addition to bending strength, zirconia ceramics also have good compressive strength and can maintain structural integrity under high pressure environments.

Second, the source of strength

Crystal structure: The high strength of zirconia ceramics is due in part to its unique crystal structure. Zirconia exists in a variety of crystal forms, such as monoclinal, tetragonal and cubic phases, which can transform into each other under certain conditions, thereby absorbing energy and enhancing the toughness of the material.

Stabilizer addition: In order to further improve the strength of zirconia ceramics, stabilizers (such as Yttrium oxide Y2O3) are usually added to inhibit the volume change during the transformation of crystal form, thereby improving the overall strength and toughness of the material.

Third, application field and strength requirements

Dental field: In the dental field, zirconia porcelain pieces are widely used in the production of dental crowns, dental Bridges and other restorations. These restorations need to withstand complex loads such as chewing forces, and therefore require extremely high material strength. The high strength properties of zirconia ceramics make them ideal for dental restorations.

Industrial field: In industrial manufacturing, zirconia ceramic tools are used for high-speed cutting and precision machining because of their high strength and wear resistance. In addition, zirconia ceramics can also be used as wear-resistant components such as bearings and valves, as well as materials for components such as high-temperature furnaces and gas turbine blades, which place extremely high requirements on the strength of materials.

Fourth, strength test standards

The strength test standards of zirconia ceramics at home and abroad are not completely consistent, but usually include the test of bending strength, fracture toughness and other indicators. For example, the international standard ISO 6872 stipulates that the breaking strength of zirconia ceramics is 800-1200 mpa; The Japanese standard JIS R1601 stipulates 600MPa and above; The American standard ASTM F1875 specifies a minimum breaking strength of 900MPa. These standards provide a reference for the strength evaluation of zirconia ceramics.

To sum up, zirconia porcelain has been widely used in many fields because of its high strength characteristics. Its high strength comes from the unique crystal structure and the addition of stabilizers, which can meet the requirements of use under various complex loads. At the same time, the strength test standards of zirconia ceramics at home and abroad also provide a reliable basis for the strength evaluation of materials.