Ceramic balls are spherical, rolling elements that provide higher stiffness, lower thermal expansion, lighter weight, increased corrosion resistance, and higher electrical resistance than steel balls. They are made from a variety of ceramic materials.
Alumina Oxide ceramic balls may be used at temperatures up to 3180 ºF. Ceramic balls are extremely hard, resistant to abrasion, and immune to all furnace atmospheres.
17% Al2O3 Inert Alumina Ceramic Ball (Catalyst Support Media) are the most widely used as Catalyst Support Media in the world wide because of their excellent consistence and reliability. It is produced by very high quality chemical-porcelain clay materials, which has quite excellent stability, high mechanical strength and resistance to thermal shock, this makes them all ideal choice for support of all types of catalyst.It’s widely used in petroleum, chemical, fertilizer, gas and environmental protection industries, as a catalyst in the reactor to cover support material and tower packing. It has a high temperature and high pressure resistance, bibulous rate is low, the characteristics of the chemical performance is stable.Can withstand the erosion of acid, alkali and other organic solvents, and can endure in the production process of temperature changes. Its main function is to increase gas or liquid distribution points, support and protection intensity is not high activity of the catalyst.
Materials of Construction
Ceramic balls are made of a variety of different ceramic materials. Choices include alumina, alumina-zirconia, aluminum nitride, and aluminum silicate; boron carbide and boron nitride; cordierite and forsterite; carbon and graphite; magnesia, metal boride, silica, and silicon carbide; and zircon, zirconia, and zirconium phosphate.
Features / Properties of Alumina Oxide Balls
Alumina oxide (AL2O3) is a top choice of ceramic balls due to its high corrosion resistance and high operating temperature capabilities. Precision alumina oxide balls are used where a material that resists abrasion, corrosion, and oxidation is required. Balls manufactured from alumina oxide typically are selected for high-temperature environments and high-wear applications due to their proven performance in extreme conditions. In fact, alumina oxide balls maintain dimensional stability up to 3180 ºF making them ideal for high-temperature environments.
Because of their durability, alumina oxide balls have a variety of heavy-duty and industrial uses. For example, the use of alumina oxide balls allows industrial bearings to run at higher speeds and higher temperatures.
Chemical and down-hole pumps
Valves and bearings
Gages and flowmeters
Strong corrosion resistance
Non-porous and durable
Good electrical insulators
Tolerant to water and salt solutions
Resistant to many chemicals and acids
Spin faster than steel balls
Lighter and harder than steel balls
Can be used up to 3180 ºF
Require less lubrication than other ball materials
Allows for high compressive strength
Can be susceptible to damage by hydrochloric and hydrofluoric acids
Not suited for high alkaline environments
Ceramic balls are also used in float or level sensing, flow metering, gaging or alignment, valves, sprayers and pumps, and pollution or vapor control systems.
Applications where alumina oxide balls are used include chemical pumps, down-hole pumps, valves, bearings, gages, flowmeters, etc.
Because of their high hardness, low thermal expansion and properties such as wear and temperature resistance, ceramic balls offer clear advantages on other materials for various applications. Due to their excellent rolling ability, ceramic balls are mainly used for rolling elements in high precision bearings.
Ceramic media are also used for deburring surfaces, as grinding balls, in the petrochemical industry and in the manufacture of medical equipment. This unrivalled light and non-magnetic material is also ideally suited to the aerospace industry, for probes, masterballs and calibration balls for precision equipment such as 3D coordinate measuring machines.
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