Balls manufactured from a variety of ceramic materials are extremely resistant to corrosion and abrasion. Ceramic Balls exhibit low thermal conductivity and resistance to extreme temperatures (some in excess of 3250°F). Bearing friction is less likely to increase as temperature increases when using ceramics and heat absorption is considerably less than other materials allowing lower cooling requirements. These qualities make ceramic balls useful for flow control, metering and bearing applications in harsh environments. Precision Ceramic Balls are available in the following materials:
Alumina Oxide Balls
Alumina oxide balls are resistant to most corrosive materials, however it is not recommended for environments containing hydrochloric and hydrofluoric acids or strong alkaline solutions. Alumina Oxide’s maximum useful temperature is 3180° F.
Ruby Sapphire Balls
Ruby sapphire balls are opaque red in color and frequently used in gauging devices. Ruby Sapphire is resistant to most corrosive material even at very high temperatures. Ruby Sapphire’s maximum useful temperature is 3250° F.
Silicon Nitride Balls
Silicon nitride balls are a new material suitable for applications where high loads, high speeds and extreme temperatures are factors. Long life and the need for no lubrication makes this material very suitable for many applications. Silicon Nitride is anti-magnetic and resistant to corrosion by most substances.
Zirconia balls are inert to corrosive materials with the exception of hydrofluoric acid and hot, concentrated sulfuric acid. Zirconia has a maximum useful temperature of 1800° F.