Zro2 - Materials - Technical Information

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Zro2 - Materials - Technical Information - Hobby and Engineering

Zirconia (ZrO2)

MBA Products made from this material
Balls, Bearings

Zirconia offers chemical and corrosion inertness to temperatures well above the melting point of aluminium oxide. Zirconia has low thermal conductivity. It is electrically conductive above 600^oC. Bearings made from Zirconia can be run at extreme temperatures, even higher than that of Silicon Nitride, however the PTFE cage must be removed if temperature will exceed the max temperature for PTFE.

Zirconia bearings are only for slow speed applications, but will handle temperature and chemical resistance better than Silicon Nitride. They run smoothly without lubrication, which means nearly no maintenance is required. Full ceramic bearings are used in chemical, metallurgical, food, electronic and other industries.

Physical Properties
PROPERTY	UNIT	VALUE
Volume Resistivity	Ohm.cm	10¹⁰
Compressive Strength	MPa	1800
Hardness	kgf.mm²	1300
Porosity	%	0
Tensile Strength	MPa	440
Compressive Strength	MPa	1800
Flexural Strength	MPa	900
Elastic Modulus	GPa	200
Poisson's Ratio		0.23 to 0.31
Density	g/cm³	6.0
Thermal Conductivity	W/m.^oK	1.8 to 3.0^oC
Coefficient of Thermal Expansion	10^-6/^oC	10.1
Max. use temperature (unloaded)	^oC	1100
Electrical Resistivity	ohm/cm	2.2 x 10¹² @ 500^oC

Chemical Resistance
Chemical	Resistance
Acids (Concentrated)	Fair
Acids (Dilute)	Good
Alcohols	Good
Alkalis	Good
Greases and Oils	Good
Halogens	Good

Products made with Zirconia can be found in the MBA online catalogue.

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Tables and information on this web site should be read as a general guide only. The relevant standards should be consulted to ensure accuracy

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Hobby and Engineering Supplies offers thousands of products including remote controlled cars, planes, boats, and helicopters. We stock spare parts for remote controlled models. Our range includes the popular Solarbotics solar model kits and spares. We also distribute the full range of miniature engineering products from Miniature Bearings Australia. This range includes small bearings, timing pulleys, timing belts, seals, o-rings, gears and more. Also available from our store in Mansfield Queensland are a full range of lubricants, adhesives, balsa wood and plastic rod and sheet materials. See our Online Catalogue for more information. Our main business is handled from our sales counter and showroom at 3239 Old Cleveland Road Capalaba West, Queensland, Australia, but we also sell by phone, fax, online and mail order. We also offer all of our hobby and engineering parts through our online store.

Using the links at the top of this page you will find extensive information including catalogues (Products and Store link), technical data, and other product specific information.

We also suggest that you may want to take a look at the technical information sites - Shafting Information, Couplings Information and Gearboxes Information.

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