The zirconia exists in three crystalline phases at different temperatures. At very high temperatures (>2370°), it has a cubical structure. At intermediate temperatures (1170°-2370°), it has a tetragonal structure. At low temperatures (below 1170°), the material turns into a monocline structure. The transformation from tetragonal to monocline is quick and associated to an increase in volume equal to 3,5%, which causes wide cracks in the material. This behavior destroys the mechanical properties of the components produced.
Some oxides such as MgO, Cao and Y203 melted in the crystal structure can slow down or eliminate these changes in the crystal structure itself.
- Properties: light yellow dust with stable chemical performance
- Use: applicable to various ceramic structures, pigments and materials resistant to high temperatures
- Properties: white monocline dust
- Use: technical ceramics, electronic components, glass, glazes, polishing of materials
- Properties: white dust with stable chemical properties and controlled specific surface area
- Use: wider use in the sectors of advanced ceramics, electronics, fireproof equipment, dentistry, cutting tools and milling beads