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Ceramisis Ltd
29, Harley Street,
London,
W1G 9QR,
England
Tel:44(0)20 7927 6710
Fax:44(0)20 7637 0419
sales@ceramisis.com
 

 

 

                                 

In vacuum substrate heating Vacuum & high temperature materials Vacuum furnace insulation


>Macor Material Properties.

 Macor Machinable Ceramic

Macor is a Machinable Technical ceramic which is an ideal prototyping material for use in a vacuum environment at low or high temperature. Continuous use temperature is 800 C and the coefficient of thermal expansion matches most metals. It is non wetting, exhibits zero porosity, and unlike ductile materials, will not deform. An excellent insulator at high voltages, various frequencies and high temperatures. Machining tolerances are excellent at 0.013mm it can also be machined to a surface finish of 0.5 microns and polished to a smoothness of 0.013microns. It can be sealed and joined both to itself and other materials.

  • General Technical specifications

Thermal Properties:

 

coefficient of expansion

 

-200 to+25 C............... 74x10-7 C

 

+25 to +800 C...............126x10-7 C

 

Specific heat (25 C)

0.79kj/kg C

Thermal conductivity

1.46W/m C

Continuous op temp

800 C

Max no load temp

1000 C

Mechanical properties:

 

Density

2.52g/cm(3)

Porosity

0%

Young's mod @25 C

66.9GPa

Hardness Rockwell A

48

Fracture toughness

1.53MPa M 0.5

Electrical properties:

Dielectric constant @ 25 C

1 KHz

6.03

8.5GHz

5.67

Loss tangent @ 25 C

1KHz

4.7x10-3

8.5GHz

7.1x10-3

Dielectric strength ac/dc (at 0.01 thickness@ 25 C)

40KV/mm

DC volume resistivity @25 C

.>10 *16 ohm-cm

If you have a component part you need made or would like pricing on the raw material, contact us by E-mail, Telephone or Fax to discuss. We have years of technical knowledge and experience to help with your applications.

 

 

 

 

 

Tel: +44 (0)20 7927 6710 Fax: +44 (0)20 7637 0419 sales@ceramisis.com Ceramisis Ltd, 29, Harley Street, London, W1G 9QR