Machinable Alumina Al2O3

Machinable Alumina Al2O3


Final Advanced Materials provides machinable ceramics. Cotronics machinable alumina Al2O3 is available in boards and rods, we can machine according to drawings


Machinable alumina presentation

Cotronics Rescor 960 is a 96% Alumina, Machinable Ceramic that is usable to 1650°C. It is manufactured from high purity alumina by a unique process.  
Machining can be accomplished with conventional tooling on standard shop equipment. No heat treatment is required.    
Rescor 960 Machinable Alumina can be used continuously to temperatures of 1650°C and offers the convenience and economy of an in house capability for Alumina parts.
The chemical, thermal and electrical properties of Rescor 960 is equivalent to standard high alumina ceramics.    



Machinable alumina applications


Rescor 960 is ideal for applications in electrical, electronic, metallurgical, fixtures and vacuum industries.    

Properties

Units

Alumina silicate raw

Alumina silicate

1100°C

Alumina silicate

1300°C

Macor®

Glass ceramic (Vitro 800)

Machinable alumina

Machinable boron nitride

Aluminium nitride (Shapal M™)

Machinable Aluminium nitride

Physical characteristics

Density

g/cm3

2.2

2.4

2.5

2.52

2.7

3.8

1.85

2.9

2.9

Porosity

%

1.5 - 2

0 - 0.5

0 - 0.5

0

 0.096

10

14

0

< 0,1

Water uptake

%

1.5 - 2

0 - 0.5

0 - 0.5

0

0.038

2 - 3.5

/

0

0

Mechanical characteristics

Hardness

Mohs: 2.5

Mohs: 5.5

Mohs: 7.5

Rockwell A: 48

Mohs: 4

Mohs: 5

Knopp: 4 kg/mm²

Vickers: 3900 Mpa

Vickers: 3750 Mpa

Compressive Strength

N/mm2

6

150

800

345

 488

422

20

1200

1170

Flexural Strength

N/mm2

12

50

80

94

 108

267

50

300

300

Modulus of Elasticity

GPa

/

/

/

66.9

 65

/

/

190

180

Thermal characteristics

Peak Temperature

°C

900

1100

1400

1000

 800

1650

850

1000

1000

Continuous Temperature

°C

700

1100

1300

800

 800

1650

850

1000

1000

Specific Heat at 20°C

J/kg°K

/

/

/

0.79

/

/

1.5

/

/

Thermal Conductivity at 100°C

W/m°K

1.07

1.7

2.2

1.46

 1.68

4.61

90

90

90

Coefficient of Expansion

20 - 40°C

10-6/°K

/

/

/

9.3

/

/

/

4.4

/

20 - 600°C

/

2.9 - 3.6

 6-8

11.4

8,6

/

/

4.8

4.5

20 - 800°C

/

/

/

12.6

/

/

/

5.1

/

20 - 1000°C

 7-12

/

 4-10

/

/

/

0.57

/

/

Electrical characteristics

Specific Resistivity at 20°C

Ohm.cm

1010

1012

1012

1016

 1.8x1014

1014

1014

1012

1012

Dielectric Constant at 20°C

at 1 KHz

/

/

6.1

6.03

 6~7

9 (@ 100kHz) 

4

7.1

7.1

Loss Tangent

at 1 KHz

/

/

9x10-5

0.005

 /

/

0.0012

0.001

/

Dielectric Strength at 20°C

kV/mm

 8-10

 6-7

 12-17

40

 > 15

7.87

2

40

40

Chemical characteristics

Corrosion resistance at 20°C

B

B

B

B

 B

B

/

/

/

Resistance to alkalis at 20°C

B

B

B

TB

 TB

B

/

/

/

Machinable technical ceramics (873.92k)

Machinable technical ceramics data sheet.