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MACORMachinable Glass CeramicFor Industrial Applications

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A unique

material

MACORMachinable Glass CeramicMACOR machinable glass ceramic is recognized worldwide to be a major technological innovation, as well as a technical

solution for a wide range of industrial applications.

Opening a wide range of possibilities MACOR gives the performance of a technical ceramic with the versatility of a high

performance polymer, while providing the machinability of a soft metal.

As a result, MACOR is an outstanding engineering material which can quickly be designed into highly complex shapes, using

conventional metalworking tools.

Unique compositionMACOR can be considered unique as its composition comprises 55% fluorophlogopite mica and 45% borosilicate glass. Cornings unique

production process results in Macors microstructure that is a key to its versatile properties.

General propertiesMACOR offers a unique combination of properties, unlike any other technical material.

It is a white, nonwetting, odorless and non outgassing material that exhibits zero porosity.

Extremely machinable, MACOR offers tight tolerances capabilities,

allowing complicated shape design (optimal performances up to

+/- 0.013 mm for dimensions, < 0.5 m for finished surface and

up to 0.013 m for polished surface).

MACOR remains continuously stable at 800 C, with a maximum

peak at 1000 C under no load, and unlike ductile materials, doesnt

creep or deform.

Its coefficient of thermal expansion readily matches most metals

and sealing glasses.

As an electric insulator, particularly at high temperatures, it is

excellent at high voltages and a broad spectrum of frequencies.

Material FormsCorning supplies MACOR as slab and rod.

High precision finished parts are manufactured by our specialist partners.

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Key

Benefits

Unrivalled properties combination - A wide range of possibilitiesQuickly - Accurately - Economically

Industry ApplicationsMACORbuilds value in every field :

Constant and ultra-high vacuumenvironments

Laser technology

Semiconductor / Electronic

Aerospace / Space

Medical/ Laboratory equipment

Fixtures

Chemical

Automobile

Military

Nuclear...

Process

Ordinary machining tools

Complex design shapes

No post firing required

Fast turnaround and cost effective

Quick end-user delivery time

Product

Easily machinable

Withstands high temperatures

Low thermal conductivity

Holds tight tolerances

Electrical insulator

Zero porosity and no outgassing

Strong & rigid

Highly polishable

can be soldered to a wide range of material Radiation resistant

Lead free

Short production process

RawMaterial Machining

Finishedparts shipment

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Properties

I. Thermal SI/Metric Imperial

Coefficient of Expansion

CTE -100C25C 81 x 10-7/C 45 x 10-7/F

CTE 25C300C 90 x 10-7/C 50 x 10-7/F

CTE 25C600C 112 x 10-7/C 62 x 10-7/F

CTE 25C800C 123 x 10-7/C 68 x 10-7/F

Specific Heat, 25C 0,79 kJ/kgC 0.19 Btu/lbF

Thermal Conductivity, 25C 1,46 W/mC 10.16 Btu.in/hr.ftF

Thermal Diffusivity, 25C 7,3 x 10-7m/s 0.028 ft/hr

Continuous Operating Temperature 800C 1472F

Maximum No Load Temperature 1000C 1832F

II. Mechanical SI/Metric Imperial

Density 2,52 g/cm3 157 lbs/ft3

Porosity 0% 0%

Youngs Modulus, 25C66,9 GPa 9.7 x 10

6

PSI(Modulus of Elasticity)

Poissons Ratio 0,29 0.29

Shear Modulus, 25C 25,5 GPa 3.7 x 106PSI

Knoop Hardness, 100g 250 kg/mm2

Modulus of Rupture, 25C 94 MPa 13 600 PSI(Flexural Strength) (Minimum specified average value)

Compressive Strength 345 MPa 49 900 PSI(After polishing) up to 900 MPa 130 000 PSI

III. Electrical SI/Metric Imperial

Dielectric Constant, 25C

1 kHz 6,01 6.018,5 GHz 5,64 5.64

Loss Tangent, 25C

1 kHz 0,0040 0.0040

8,5 GHz 0,0025 0.0025

Dielectric Strength (AC) avg. 45 kV/mm 1143 V/mil25C, under 0,03 mm thickness.

Dielectric Strength (DC) avg. 129 kV/mm 3277 V/mil25C, under 0,03 mm thickness

DC Volume Resistivity, 25C 1017Ohm.cm 1017Ohm.cm

IV. Chemical Weight Loss (mg/cm2)

Solution pH Time Temp. Gravimetric

5% HCl 0,1 24 hrs 95C ~100(Hydrochloric Acid)

0,002 N HNO3 2,8

24 hrs

95C ~0,6(Nitric Acid)

0,1 N NaHCO3 8,4

24 hrs 95C ~0,3(Sodium Bicarbonate)

0,02 N Na2CO

3 10,9

6 hrs 95C ~0,1(Sodium Carbonate)

5% NaOH 13,2 6 hrs 95C ~10(Sodium Hydroxide)

Chemical durability Class

DIN 12111 / NF ISO 719 Water HGB2DIN 12116 Acid 4

DIN 52322 / ISO 695 Alkali A3

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Technical

Data

DIELECTRIC CONSTANT

30

35

40

25

20

15

10

5

0

Temperature, C

DielectricConstant

0 50 100 150 200 250 300 350 400 450 500

200 Hz

1 KHz10 KHzKHz

1 KHz10

200 Hz

100 KHz

THERMAL EXPANSION12

10

8

6

4

2

0

Temperature, C

ThermalExpan

sion,

L/L

0x10-3

-100 0 100 200 300 400 500 600 700 800

i i i i l :

THERMAL CONDUCTIVITY

Temperature, C

0 100 200 300 400 500 600 700 800

1,00

1,10

1,20

1,30

1,40

1,50

1,60

1,70

1,80

ThermalConductivity,W/mC

DC VOLUME RESISTIVITY

17

19

15

13

11

9

7

5

Temperature, C

Log,O

hm.cm

0 50 100 150 200 250 300 350 400 450 500

YOUNGS MODULUS

E

,GPa

Ex1

06,

PSI

Temperature, C

0 100 200 300 400 500 600 700 800

40

45

50

55

60

65

70

5,8

6,5

7,2

8,0

8,7

9,4

10,1

MODULUS OF RUPTURE

Strength,M

Pa

Strength,P

SI

Temperature, C

0 100 200 300 400 500 600 700 800

0

20

40

60

80

100

120

140

160

180

0

2 900

5 800

8 700

11 600

14 500

17 400

20 300

23 200

26 100

Minimum specified average value : 94 MPa

LOSS TANGENT

10

1

0,1

0,01

0,001

0,0001

Temperature, C

LossTangent

0 50 100 150 200 250 300 350 400 450 500

200 Hz

1 KHz 10 KHz

100 KHz

Actual properties of specific production

batches may vary.

Stated general properties reflect results

from regular tests on sample

quantities in Corning labs.

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For more information :

www.corning.com/specialtymaterials/macormacor@corning.com

Corning SAS - 7 bis avenue de Valvins77211 Avon, France - Tel: +33 1 64 69 71 35

YourApplication

MACOR is a registered trademark of Corning Incorporated, Corning, NY

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012CorningIncorporated.

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htsreserved