Zirconia Ceramic is usually doped with additions of some oxides (MgO, CaO,Y2O3) to make it more stable. Far now, the most widely used is Y2O3 stabilized Zirconia.Zirconia Ceramic is easier to machine than Alumina Ceramic because of the excellent fracture toughness at room temperature. the coefficient of thermal expansion is similar to steel, so it can be jointed to steel parts. Zirconia Ceramic has low thermal conductivity and superior wear resistance, it is electrical conductivity above 900℃.

Main Advantages:

• Excellent fracture toughness
• High mechanical strength and high hardness
• Very good wear resistance
• High corrosion resistance
• Low thermal conductivity
• CTE in range of steel   

 

Technical details:

Properties	Unit	Value
Color	-	White
Density	G/cm3	5.95-6.05
Water Absorption	%	0
Moh's Hardness	-	9
Flexural Strength (@R.T.)	Mpa	900
Compressive Strength (@R.T.)	Mpa	2200
Thermal Conductivity (@R.T.)	W/m.K	2.2
Coefficient of Thermal Expansion (20-1000℃)	10-6/℃	10.3
Thermal Shock Resistance	△T(℃)	280-350
Max. Working Temperature (@R.T.)	℃	850
Volume Resistivity (@R.T.)	Ω.Cm	1012
Dielectric Constant (1MHz, @R.T.)	-	26

Typical Applications of Alumina Ceramics:

1. Wire forming/drawing dies
2. Ceramic valve components (balls, seats, liners)
3. Ceramic pump liners or shafts
4. Mechanical seals
5. Ceramic cutting blades/knives
6. Grinding media
7. Thermal insulation components
8. Sandblasting nozzles
9. Medical and surgical component
10. Precision ceramic balls for bearings

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