Ceramic Balls Chart

Ceramic
Properties*
Zirconia
(Yttria stabilized)
Silicon
Carbide
Alumina
Oxide
Ruby
Sapphire
Silicon
Nitride
Max. Useful Temperature 1800°F 2500°F 3180°F 3250°F 2552°F
Density 6.06/cm3
.219 lbs/in3
3.1 gm/cm3
.112 lbs/in3
3.86 gm/cm3
.139 lbs/in3
3.98 gm/cm3
.144 lbs/in3
3.2 gm/cm3
.116 lbs/in3
Compressive Strength 794,837 psi 400,000 psi 330,000 psi 300,000 psi 341,300 psi
Young’s Modulus of Elasticity 30.6 x 106 21700 kgf/mm2 53 x 106 psi 54 x 106 psi 50 x 106 – 55 x 106 psi 47 x 106 psi
Hardness 1250 kgr/mm2 2400 Vickers 1365 Vickers 1570-1800 Vickers 1500-2000 Vickers
Thermal Conductivity 0.007 cal/cm, Sec 0 145 W/m °C80 BTU/hr ft°F 35.6 W/m °C. (@ 20°C) 6.3 W/m °C. (@800°C) 086 Cal/sec cm °C .07 Cal/sec cm °C
Thermal Expansion 10.9 x 10-6/°C 2.5 x 10-6/°F 4.6 x 10-6/°F 3.2 x 10-6/°F 1.78 x 10-6/°F
Electrical Volume
Resistivity @ 25°C
1010 Ω cm 103 Ω cm 2 x 106 Ω cm 1014 Ω cm 2.3 x 105 Ω cm
Corrosion Resistance Inert except for hydrofluoric and hot concentrated sulfuric acids. Inert to most substances. Inert to most substances, not recommended for environments of hydrochloric or hydrofluoric acids or strong alkaline solutions. Inert to most substances even at very high temperatures. Inert to most substances.
*Data from various industrial literature. Exact properties will vary from supplier to supplier.