Alumina Ceramic Material Properties

Ceramic material

Alumina ceramic (Al2O3) -- Aluminium oxide ceramics

Alumina ceramic, Al2O3 aluminium oxide ceramics is an advance ceramic materials which used for the industry.It has excellent material properties over metal.

Aluminum oxide ceramics is very hard and resistant to wear, providing high compressive strength even in extreme temperatures and corrosive environments.Alumina is also an excellent electrical insulator and gas tight.

Typical Alumina property include:
Good strength and stiffness
Good hardness and wear resistance
Good corrosion resistance
Good thermal stability
Excellent dielectric properties (from DC to GHz frequencies)
Low dielectric constant
Low loss tangent
Others

Alumina ceramic composition(Al2O3 purity 95% to 99.99%):

High purity alumina ceramics
99.99% Alumina ceramic; 99.9% Alumina ceramic,

Ordinary alumina ceramics
99.7% Alumina ceramic,99.5% Alumina ceramic,99% Alumina ceramic,97% Alumina ceramic,96% Alumina ceramic,95% Alumina ceramic

Note: different industries, different environments, different equipment, different products have different requirements on the composition of alumina, different alumina ceramic components have different performance and service life.

Alumina ceramics are currently classified into high-purity and ordinary types. High-purity alumina ceramics are ceramic materials with Al2O3 content above 99.9%; due to their sintering temperature as high as 1650-1990 ° C, the transmission wavelength is 1 ~ 6 & mu; m, generally made of molten glass to replace platinum crucible; Translucent and alkali-resistant metal corrosion are used as sodium lamps;

they can be used as integrated circuit substrates and high-frequency insulation materials in the electronics industry. Ordinary alumina ceramics are classified into 99% alumina ceramics, 95% alumina ceramics, 90 % alumina ceramics, 75% alumina ceramics, etc. according to the content of Al2O3. Sometimes the Al2O3 content is 80%; or 75% is also classified as ordinary alumina ceramic series.

Alumina Ceramic Parameters

Properties	Unit	Alumina (AL2O3)
Properties	Unit	AL2O3≥95	AL2O3≥99	AL2O3≥99.5	AL2O3≥99.8
Volumetric density	g/cm3	3.7	3.80-3.85	3.85	3.9
Hardness	HRA≥	86	88	88	88
Flexural Strength	Mpa≥	300	350	400	400
Maximum temperature	℃	1500	1500	1500	1500
Line expansion coefficient	×10-6/℃	7.5	8.2	8.2	8.2
Dielectric constant	εr(20℃,1MHz)	9	9.2	9.2	9.2
Media loss	tanδ×10-4,1MHz	3	2	2	2
Volumetric resistivity	Ω·cm(20℃)	1013	1014	1014	1014
Breakdown strength	KV/mm,DC≥	20	20	20	20
Acidic resistance	mg/cm2≤	0.7	0.7	0.7	0.7
Alkaline resistance	mg/cm2≤	0.2	0.1	0.1	0.1
Abrasion resistance	g/cm2≤	0.2	0.1	0.1	0.1
Compressive strength	Mpa≥	2500	2500	2500	2800
Flexural Strength	Mpa≥	200	350	350	350
Thermalcoefficient	W/m·K(20℃)	20	25	25	25

Note: The above table is made by Mingrui ceramic manufacturer, the table is part of the parameters of alumina ceramics, All specific alumina ceramic parameters, please contact us.our officials E-mail: admin@cerampart.com

Properties of Alumina/Aluminum Oxide (Al2O3)
1.Very good electrical insulation (1x10^14 to 1x10^15 Ωcm)
2.Moderate to extremely high mechanical strength (300 to 630 MPa)
3.Very high compressive strength (2,000 to 4,000 MPa)
4.High hardness (15 to 19 GPa)
5.Moderate thermal conductivity (20 to 30 W/mK)
6.High corrosion and wear resistance
7.Good gliding properties
8.Low density (3.75 to 3.9 g/cm3)
9.Operating temperature without mechanical load 1,000 to 1,500°C.
10.Bioinert and food compatible

The composition types of Alumina ceramic

Alumina(Al2O3)95%; 97%; 98%; 99%; 99.5%: 99.7%; 99.8%; 99.9%; 99.99%...

Catalyst support:

Alumina Al2O3 has been used as the carrier of platinum, palladium, cobalt, manganese, iron, nickel, vanadium and other compounds, forming oxidation-reduction and acid-base catalysis.

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Ceramic manufactures OEM ceramic components and enjoys on-going relationships with businesses of all sizes in dozens of industries, in addition to the markets showcased at the top of this page, including:

Products and Aplications

– Pieces, Plates, Boards, Trays, etc. in Alumina-Ceramic / Cordierite-Mullite
– Tubes, Rods, Rollers, Supports, etc. in Alumina-Ceramic / Cordierite-Mullite
– Protection, Thermocouples, Insulation, etc. in Alumina-Ceramic / Cordierite-Mullite
– Pieces, Plates, Tubes, Rods, Rollers, etc. in Zirconium Oxide
– others

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automotive, aviation, space travel
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friction-reduction, wear- and corrosion -protection
high temperature applications
laboratory technology
laser technology
mechanical and chemical process engineering
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optics
semiconductor processing equipment
surface treatment
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Alumina ceramic (Al2O3) -- Aluminium oxide ceramics

The composition types of Alumina ceramic

Catalyst support:

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