Macor® Properties

Nuclear-related experiments

Since Macor® MGC is not dimensionally affected by irradiation, small cubes of the material are machined to a tolerance of one micron and are used as a reference piece to measure dimensional change in other materials.

Welding nozzles

Welding equipment manufacturers are using Macor® MGC as a nozzle on the tips of oxyacetylene torches. The material’s nonwetting characteristic means molten particles won’t adhere to and decrease the effectiveness of the nozzle.

Fixtures

Macor® MGC is used as an electrode support and burner block in several industrial high heat, electrical cutting operations due to its low thermal conductivity and excellent electrical properties.

Medical Equipment

Producers of medical components are intrigued by Macor® MGC’s inertness, precise machinability and dimensional stability.

Conclusion

When you need the performance of a technical ceramic- (high use temperature, electrical resistivity, zero porosity) and your application demands the ready fabrication of a complicated shape look at Macor® MGC. It will lower costs and substantially reduce the time between design and actual use.

Properties

Thermal

SI/Metric Imperial
Coefficient of expansion

-200-25°C

25-300°C

25-600°C

 


7.4 x 10
-6/°C

9.3 x 10-6/°C

12.6 x 10-6/°C

 


41 x 10
-7/°F

52 x 10-7/°F

70 x 10-7/°F

Specific heat

25°C

0.79 KJ/kg°C 0.19 Btu/lb°F
Thermal Conductivity

25°C

1.46 W/m°C               Btu in

10.16     

Hr ft2 °F

Thermal diffusivity 25°C 7.3 x 10-7 m2 /s 0.028ft2 /hr
Continuous operating temp 800°C 1472°F
Maximum no load temp 1000°C 1832°F

Mechanical

SI/Metric Imperial
Density 2.52g/cm3 157lbs/ft2
Porosity 0% 0%
Young’s modulus 25°C (Modulus of Elasticity) 66.9 GPa 9.7 x 106psi
Poisson’s ratio 0.29 0.29
Shear modulus 25°C 25.5 GPa 3.7 x 106psi
Hardness Knoop 100g

Rockwell A

250
48
250

48

Modulus of rupture 25°C

Flexural Strength

94Mpa

Min. specified average value

13,600 psi

Min. specified

Average value

Compressive Strength 345MPa 50,000 psi
Fracture Toughness 1.53MPa m0.5 1,390psi in0.5

Electrical

SI/Metric Imperial
Dielectric constant 25°C

1KHz

8.5GHz

6.03

5.67

6.03

5.67

Loss tangent 25°C

1KHz

8.5GHz

4.7 x 10-3

7.1 x 10-3

4.7 x 10 -3

7.1 x 10 -3

Dielectric Strength (25°C)

AC avg. (12mm thickness)
DC avg.(12mm thickness)

9.4KV/mm

62.4KV/mm

785V/mil

5206V/mil

DC volume resistivity 25°C >1016 ohm-cm >1016 ohm-cm

Chemical

Tests Results
Solution pH Time Temp Weight loss (mg/cm?)gravimetric
5% HCl
Hydrochloric Acid

0.002 N HNO3 Nitric Acid

0.1  N NaHCO3 Sodium Bicarbonate

0.02 N Na2CO3 Sodium Carbonate

5% NaOH Sodium Hydroxide

0.1

2.8

8.4

10.9

13.2


24
hrs

24 hrs

24 hrs

6 hrs

6 hrs


95°C

95°C

95°C

95°C

5°C


~100

~0.6

~0.3

~0.1

~10

Resistance to water over time

H20

7.6 1 day*

3 days*

7 days*

3 days#

6 days#

95°C

95°C

95°C

95°C

95°C

0.01

0.07

9.4

0.06

0.11

* – Water not freshened daily # – Water freshened daily


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Lukely Works, Carisbrooke Road, Newport, Isle of Wight, United Kingdom, PO30 1DH
Tel: +44 (0)1983 528697 - Fax: +44 (0)1983 822252 - Email: info@ceramic-substrates.co.uk
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