ZIRCONIUM OXIDE (ZrO2) BALLS

Refractory ceramic material balls, they provide excellent corrosion, wear and heat resistance. They improve their hardness when they are subjected to collisions. Yttrium doped Zirconia Oxide, they provide the best properties between ceramic materials in grinding and milling applications.
Applications
Special bearings, pumps and valves that operate in aggressive environments, check valves, flow meters, measurement instruments. They are used in the medical field (very pure material). Grinding and milling applications.
Commercial name
Other name
Formula
Oxides %
Zirconium Dioxide
Zirconia
ZrO2 + Y2O3
(94.6-95.4 %ZrO2 / 4.6-5.4 %Y2O3)
Physical / mechanical / thermal / electric / magnetic properties
Property
Symbol
U.o.M.
Type
Notes
Values
Density
δ
[g/cm3]
Physical
Room temp.
6
Young's modulus
E
[GPa]
Mechanical
-
210
Friction coefficient
µ
-
Mechanical
Room temp.
0.2
Specific heat
c
[J/kg-K]
Thermal
Room temp.
450
Coefficient of linear thermal expansion
α
[10^-6/ºC]
Thermal
(ΔT=0-100°C)
10.5
Thermal conductivity
λ
[W/(m·K)]
Thermal
Room temp.
3.5
Volume resistivity
ρ
[Ω*m]
Electric
-
> 10^11
Relative magnetic permeability
µ
-
Magnetic
Diamagnetic
<~1
Technical data
Property
Type
U.o.M.
Values
U.o.M.
Values
Hardness
Mechanical
[HRA]
87 - 91
-
-
Ultimate compressive strength
Mechanical
[MPa]
1750 - 2500
[psix10^3]
254 - 362
Service temperature
Thermal
[ºC]
0 / 1350
[ºF]
32 / 2462
Range
Diameters (min/max)
U.o.M.
Diameters (min/max)
U.o.M.
Precision grades (ISO 3290 / AFBMA)
0.300 - 101.600
[mm]
1/64 - 4
["]
G10-16-20-25-28-40-60-100
Corrosion Resistance
Zirconia balls are chemically inert in molten metals, caustic and organic solvents and most acids substances. They are not resisting against hydrochloric acid and strong alkaline solutions.
Revision n.13