Zirconia is most famous high-performance material among all oxide ceramics. Ceramic components made out of Zirconia generally consist of Zirconia as basic material doped with some percentage of other oxides like Yttria (Y2O3) or Magnesia (MgO). Depending on doping material different material properties could be achieved because of influencing the Yttria's microstructure. The "ceramic steel" titled Zirconia is doped with Yttria forming an ultra-fine ductile structure with sub-micron grain formation leading to enormous bending strengths. Magnesia doped qualities are less strong also showing a coarser microstructure.

Common applications of Zirconia ceramics include extrusion dies, wire and pipe extension, guide and other wear rollers, pressure valves, and bearing materials.

Typical Properties
*High temperature capability up to 850oC
*High density
*High strength and fracture toughness
*High hardness and wear resistance (far higher than Stainless steel,Brass,Plastics)
*Low thermal conductivity (20% that of Alumina)
*Good chemical resistance
*Ionic conductivity

Ceramic Manufacturing Process
Raw Material >> Milling/Mixing >> Spray/Drying >> Forming >> Green Machining >> Sintering >> Grinding >> Special Process >> Inspection >> Cleaning >> Final Product

Application of Zirconia Ceramics
1.Precision ball valve (balls and seats)
2.Pump seals, valves and impellors
3.High density grinding media
4.Oxygen sensors
5.Threadguides
6.Fuel cell membranes
7.Cutting blades
8.Radio frequency heating susceptors
9.Medical prostheses
10.Metrology components

Characteristics	Unit	95Al2O3	99Al2O3	ZrO2	GPSi3N4	BN	GlassCeramic
CrystalStructure	-	hexagonal	hexagonal	tetragonal	hexagonal	hexagonal	-
Color	-	white	ivory	white	gray	white	white
Density	g/cm3	3.65	3.88	5.95	3.22	2.26	2.55
WaterAbsorption	%	0	0	0	0	0.0-1.0	0
Young'sModulus	Gpa	280	350	205	295	670	65
VickersHardness	Gpa	14	20	12	18-20	-	-
FlexuralStrength	Mpa	280	300	900	650	51	100
CompressiveStrength	Mpa	2000	2500	2200	2200	230	500
ThermalConductivity	W/(m·k)	18-25	30	2.2	25	20	1.7
Thermalshockresistance	Δ(℃)	220	180-200	280-350	450-650	>1500	25-100
Max.WorkingTemperature	℃	1500	1700	850	1200	960	800
VolumeResistivity	Ω·cm	>10^15	>10^14	>10^12	>10^14	10^13	10^16
DielectricConstant(1MHz)	-	9.5	9.8	26	8.2	4.08	6.02
DielectricStrength	kV/mm	16	22	-	16	375	40

About UniPreTec
UniPreTec provides high-performance ceramic products in Alumina, Zirconia, Zirconia Toughened Alumina, Silicon Carbide, Silicon Nitride and further special materials. Along with these materials, we offer several machining from which to choose such as cutting, drilling, sawing, turning, grinding, polishing etc.. Furthermore, our technologies and equipments allow us to provide various and flexible forming processes, like dry pressing, isostatic pressing, extrusion, injection moulding and slip casting.