Name: Electrical Insulator Al2O3 Ceramic Rings
Brand: UNIPRETEC
Availability: InStock

Product Details

Product Description

Contact Us

Mr. Chandler Tsai (Sales Engineer)

Tel.: 0086-592-5510319

Mob.: 0086-18650119402

E-Mail: UPT200(@)UNIPRETEC.COM

Skype: chandler.tsai0086

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Add.: No.153 Yuehua Road, Xiamen 361006, CHINA

Made from high-tech Al2O3 Alumina Ceramic. Alumina ceramic is the most mature of the engineering ceramics, offering excellent electrical insulation properties together with high hardness and good wear resistance but relatively low strength and fracture toughness.

Alumina ceramic is the material of choice for alumina wear parts. The proven wear and heat resistance of alumina wear parts makes them ideal for the manufacture of wear-resistant components.

Alumina has a high melting point, high hardness, although mechanical strength is reduced at temperatures above 1000 C. Due to the relatively large coefficient of thermal expansion, thermal shock resistance is reduced.

Alumina is an electrically insulating material, with a high electrical resistivity, increasing with purity.

Good chemical stability of alumina leads to high corrosion resistance. It is insoluble in water and only slightly soluble in strong acid and alkaline solutions. Testing has shown that the low chemical solubility of alumina ceramics components makes them highly resistant to chemical corrosion. This is what makes high purity alumina the material of choice for components in a wide range of industrial applications.

Material Properties

	99 Al2O3 Alumina	ZrO2 Zirconia	Si3N4 Silicon Nitride
Color	ivory	white & black	black & grey
Density g/cm3	3.90	6.00	3.20
Water Absorption %	0	0	0
Vickers Hardness Gpa	20	12	18
Flexural Strength Mpa	300	900	650
Compressive Strength Mpa	2500	2200	2200
Thermal Conductivity W/m.K	30	2.2	25
Max. Working Temperature Deg. C	1700	800	1200
Volume Resistivity OMG.CM	>10^14	>10^12	>10^14
Dielectric Strength KV/mm	22	-	16

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FAQ

Q1: What are advanced ceramics?

A: Advanced ceramics - also referred to as engineering, structural or technical ceramics - have been processed to be very pure and, in general, have superior properties to unrefined ceramics. Many are man-made, i.e. they do not occur naturally, e.g. silicon nitride, and their properties can be enhanced to produce very high strength at high temperatures, good corrosion resistance, etc.

Q2: Can I machine the ceramics myself?

A: The harder ceramics like alumna and zirconia will require diamond tooling but other materials like Machinable Glass Ceramic and Hot Pressed Boron Nitride can be machined. To get the right result it does take time, experience and semi-specialised tooling but it can be done and many of our customers take advantage of this when they need extremely fast solutions in-house.

Q3: Can I get a sample or purchase a small quantity?

A: Yes, we are happy to supply small samples of material for you to test. We can also supply prototype quantities through to volume production to suit your needs.

Q4: How long will it take for you to send me a quote?

A: This depends totally on the complexity of your requirements. For simple items such as bars and rods, we can generally supply a quotation within 24 hours

Q5: What's the delivery time?

A: For our standard products, like ceramic protection tubes and insulating rods, delivery time is normally 7 working days. For hot pressed boron nitride and machinable glass ceramic, it's about 10 working days. For customized products made of alumina, zirconia, boron carbide and silicon nitride, total producing time is about 30 working days.