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What Are The Kinds Of Zirconia Ceramics?

Hangzhou JWG Technology Co.Ltd | Updated: Aug 14, 2017

What are the kinds of zirconia ceramics?

Pure ZrO2 is white, containing impurities when yellow or gray, generally contain HfO2, not easy to separate. About 19 million tons of zirconium have been found in the world, and zirconium oxide is usually purified by zirconium ore.. Under atmospheric pressure, there are three kinds of pure ZrO2 crystalline monoclinic zirconia (Monoclinic) (m-ZrO2) (Tetragonal), tetragonal zirconia (t-ZrO2) and cubic zirconia (Cubic) (c-ZrO2), the three crystal exists in different temperature range, and can be transformed into each other:

Temperature density

Monoclinic (Monoclinic) zirconia (m-ZrO2) <950 DEG C, 5.65g/cc

Tetragonal (Tetragonal) zirconia (t-ZrO2) 1200-2370 6.10g/cc

Cubic (Cubic) zirconia (c-ZrO2) >2370 DEG C 6.27g/cc

The above three kinds of crystalline with different physicochemical characteristics, required in the practical application for the form and use of performance, usually by adding different types of stabilizers made of zirconia ceramics of different types, such as partially stabilized zirconia (partially stabilized, zirconia, PSZ), when CaO, MgO, stabilizer Y2O3, are expressed as Ca-PSZ, Mg-PSZ, Y-PSZ etc.. The tetragonal zirconia consisting of metastable t- ZrO2 is called tetragonal zirconia polycrystal ceramics (tetragonal, zirconia, polycrysta, TZP). When the stabilizers are Y2O3 and CeO2, they are expressed as Y-TZP, Ce-TZP and so on.

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