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Zirconia grades are various. They differentiate from each other by the nature of the stabilising agent which is used. In its pure form, zirconia is not stable. Magnesia-partially-stabilised zirconia (MgO-PSZ) and yttria-partially stabilised zirconia (Y-TZP) in particular offer an outstanding resistance to mechanical shocks as well as to flexural load, because of their high fracture toughness and relative “ elasticity ”. These two zirconias are advanced ceramics of choice for severe mechanical applications. Other grades in fully stabilised composition exist and are mostly used for high-temperature applications. Selection of materials Microcertec offers those two types of zirconias that are mostly requested on the market, in pressed and extruded grades : magnesia-partially-stabilised zirconia (MgO-PSZ) yttria-partially-stabilised zirconia (Y-TZP) Properties MgO-PSZ and Y-TZP zirconias have the following features : high density high flexural strength (> 500 MPa for Mgo-PSZ and >...