Ceramic balls

Ceramic balls are mainly used in harsh environments. Their main advantages on steel is that they have a density 40% lower than steel, have 29% lower thermal expansion and are 150% harder. In certain high-speed applications their life is extended hundred times. It is also used as grinding media. There are three main types:

Alumina Oxide, Zirconia Oxide and Silicon Nitride.

Alumina Oxide - ceramic balls
Composition	99.5% Al2O3 / 0.5% other
Hardness	1700 Hv
Ultimate Tensile Strength	31,000 psi
Ultimate Compressive Strength	>300,000 psi
Modulus of Elasticity	53 x106 psi
Maximum Working Temperature	1400oC
Corrosion Resistance	Inert except for hydruofluric, hydrochloric acid and hot concentrated sulphuric acids. Inert to most substances, not recommended for environments of strong alkaline solutions

Zirconia Oxide - ceramic balls
Composition	97% ZrO2 / 3% MgO
Hardness	80 - 84 Ra
Ultimate Tensile Strength	60,000 psi
Ultimate Compressive Strength	285,000 psi
Modulus of Elasticity	29 x106 psi
Maximum Working Temperature	2400oC
Corrosion Resistance	Inert to most substances, not recommended for environments of hydrochloric or strong alkaline solutions

Silicon Nitride - ceramic balls
Composition	87% Si3N4 / 13% other
Hardness	1400 - 1700 Hv
Ultimate Tensile Strength	/
Ultimate Compressive Strength	>570,000 psi
Modulus of Elasticity	44-45 x106 psi
Maximum Working Temperature	1000oC
Corrosion Resistance	Inert to most substances.

For ceramic balls: data are indicative and can not bind the responsability of Preciball.

New planning interface

New website - New design

Ceramic balls