Advanced Ceramics – Mechanical, Thermal, Electrical and Wear Properties of Engineering Ceramic from CoorsTek

Topics Covered

Background

Alumina Based Ceramics

Alumina Based Ceramics (cont)

Zirconia Based Ceramics

Carbide Ceramics

Carbide Ceramics (cont)

Background

CoorsTek provides a vast array of ceramic components manufactured from a range of specialized high-purity technical ceramics. Our experts help you choose the best design and material for optimal performance and component life. Provided below are some of the CoorsTek range of materials and their corresponding properties.

Alumina Based Ceramics

 

 

 

Porcelain

Mullite

AD-85

AD-90

AD-94

Properties*

Units

Test

 

 

Nom. 85% Al2O3

Nom. 90% Al203

Nom. 94% Al203

Density

gm/cc

ASTM-C20

2.40

2.80

3.42

3.60

3.70

Crystal Size (Av.)

MICRONS

THIN-SECTION

10

6

4

12

Water Absorption

%

ASTM-373

0

0

0

0

0

Gas Permeability

0

0

0

0

Color

WHITE

TAN

WHITE

WHITE

WHITE

Flexural Strength (MOR), 20° C

MPa (psi x 103)

ASTM-F417

130 (19)

170 (25)

296 (43)

338 (49)

352 (51)

Elastic Modulus

GPa (psi x 106)

ASTM-C848

104 (15)

150 (22)

221 (32)

276 (40)

303 (44)

Poisson's Ratio. 20° C

ASTM-C848

0.22

0.22

0.21

Compressive Strength, 20° C

MPa (psi x 103)

ASTM-C773

590 (86)

550 (80)

1930 (280)

2482 (360)

2103 (305)

Hardness

GPa (kg/mm2)

KNOOP 1000 gm

5.9 (600)

7.4 (750)

9.4 (960)

10.4 (1058)

11.5 (1175)

 

 

ROCKWELL 45 N

60

70

73

75

78

Tensile Strength, 25° C

MPa (psi x 103)

ACMA TEST #4

155 (22)

221 (32)

193 (28)

Fracture Toughness, KIC

MPa m1/2

NOTCHED BEAM

2

2

3 - 4

3 - 4

4 - 5

Thermal Conductivity, 20° C

W/m °K

ASTM-C408

5.0

3.5

16.0

16.7

22.4

Coefficient of Thermal Expansion, 25-1000° C

1 x 10-6/°C

ASTM-C372

4.9

5.3

7.2

8.1

8.2

Specific Heat, 100° C

J/kg*K

ASTM-E1269

950

920

920

880

Thermal Shock Resistance, Tc

°C

NOTE 3

300

300

250

250

Maximum Use Temperature

°C

NO-LOAD COND.

1400

1700

1400

1500

1700

Dielectric Strength

AC-kV/mm (AC V/mil)

ASTM-D116

9.8 (248)

9.4 (240)

8.3 (210)

8.3 (210)

Dielectric Constant, 1 MHz

25° C

ASTM-D150

5.9

6.0

8.2

8.8

9.1

Dielectric Loss (tan delta), 1 MHz

25° C

ASTM-D2520

0.0024

0.0020

0.0009

0.0004

0.0004

Volume Resistivity, 25° C

ohm-cm

ASTM-D1829

> 1014

> 1014

> 1014

> 1014

Volume Resistivity, 500° C

ohm-cm

ASTM-D1829

5 x 1012

4 x 108

4 x 108

4 x 109

Volume Resistivity, 1000° C

ohm-cm

ASTM-D1829

3 x 105

5 x 105

5 x 105

Impingement

NOTE 4

1.00

0.45

0.52

Rubbing

NOTE 4

1.00

0.36

Alumina Based Ceramics (cont)

 

 

 

AD-96

FG-995

AD-995

AD-998

PlasmaPureTM

Properties*

Units

Test

Nom. 96% Al203

Nom. 98.5% Al203

Nom. 99.5% Al203

Nom. 99.8% Al203

Nom. 99.8% Al203

Density

gm/cc

ASTM-C20

3.72

3.80

3.90

3.92

3.93

Crystal Size (Av.)

MICRONS

THIN-SECTION

6

6

6

6

6

Water Absorption

%

ASTM-373

0

0

0

0

0

Gas Permeability

0

0

0

0

0

Color

WHITE

WHITE

IVORY

IVORY

IVORY

Flexural Strength (MOR), 20° C

MPa (psi x 103)

ASTM-F417

358 (52)

375 (54)

379 (55)

375 (54)

400 (58)

Elastic Modulus

GPa (psi x 106)

ASTM-C848

303 (44)

350 (51)

370 (54)

370 (54)

370 (54)

Poisson's Ratio. 20° C

ASTM-C848

0.21

0.22

0.22

0.22

0.22

Compressive Strength, 20° C

MPa (psi x 103)

ASTM-C773

2068 (300)

2500 (363)

2600 (377)

2500 (363)

2680 (390)

Hardness

GPa (kg/mm2)

KNOOP 1000 gm

11.5 (1175)

13.7 (1400)

14.1 (1440)

14.1 (1440)

14.1 (1440)

 

 

ROCKWELL 45 N

78

82

83

83

83

Tensile Strength, 25° C

MPa (psi x 103)

ACMA TEST #4

221 (32)

248 (36)

262 (38)

248 (36)

275 (40)

Fracture Toughness, KIC

MPa m1/2

NOTCHED BEAM

4 - 5

4 - 5

4 - 5

4 - 5

4 - 5

Thermal Conductivity, 20° C

W/m °K

ASTM-C408

24.7

27.5

30.0

30.0

30.0

Coefficient of Thermal Expansion, 25-1000° C

1 x 10-6/°C

ASTM-C372

8.2

8.2

8.2

8.2

8.2

Specific Heat, 100° C

J/kg*K

ASTM-E1269

880

880

880

880

880

Thermal Shock Resistance, Tc

°C

NOTE 3

250

200

200

200

200

Maximum Use Temperature

°C

NO-LOAD COND.

1700

1700

1750

1750

1750

Dielectric Strength

AC-kV/mm (AC V/mil)

ASTM-D116

8.3 (210)

8.7 (220)

8.7 (220)

8.7 (220)

8.7 (220)

Dielectric Constant, 1 MHz

25° C

ASTM-D150

9

9.6

9.7

9.8

9.8

Dielectric Loss (tan delta), 1 MHz

25° C

ASTM-D2520

0.0002

0.0002

0.0001

0.0001

<0.0001

Volume Resistivity, 25° C

ohm-cm

ASTM-D1829

> 1014

> 1014

> 1014

> 1014

> 1014

Volume Resistivity, 500° C

ohm-cm

ASTM-D1829

4 x 109

2 x 1010

2 x 1010

2 x 1010

1 x 1011

Volume Resistivity, 1000° C

ohm-cm

ASTM-D1829

1 x 106

2 x 106

2 x 106

2 x 107

3 x 106

Impingement

NOTE 4

0.50

0.48

0.47

0.47

0.47

Rubbing

NOTE 4

0.60

Zirconia Based Ceramics

 

 

 

ZTA

TTZ

DURA-ZTM

YTZP

Properties*

Units

Test

Zirconia-Toughened
Alumina

MgO Partially
Stabilized Zirconia

MgO Partially
Stabilized Zirconia

Y2O3 Partiall
 Stabilized Zirconia

Density

gm/cc

ASTM-C20

4.05

5.72

5.72

6.02

Crystal Size (Av.)

MICRONS

THIN-SECTION

2

35

35

1

Water Absorption

%

ASTM-373

0

0

0

0

Gas Permeability

0

0

0

0

Color

WHITE

IVORY

IVORY

IVORY

Flexural Strength (MOR), 20° C

MPa (psi x 103)

ASTM-F417

450 (65)

620 (90)

758 (110)

900 (130)

Elastic Modulus

GPa (psi x 106)

ASTM-C848

360 (52)

200 (29)

200 (29)

210 (30)

Poisson's Ratio. 20° C

ASTM-C848

0.23

0.30

0.30

0.23

Compressive Strength, 20° C

MPa (psi x 103)

ASTM-C773

2900 (421)

1750 (254)

1750 (254)

2500 (363)

Hardness

GPa (kg/mm2)

KNOOP 1000 gm

14.4 (1475)

11.8 (1200)

11.8 (1200)

12.7 (1300)

 

 

ROCKWELL 45 N

85

77

77

81

Tensile Strength, 25° C

MPa (psi x 103)

ACMA TEST #4

290 (42)

352 (51)

352 (62)

Fracture Toughness, KIC

MPa m1/2

NOTCHED BEAM

5 - 6

11

11

13

Thermal Conductivity, 20° C

W/m °K

ASTM-C408

27.0

2.2

2.2

2.2

Coefficient of Thermal Expansion, 25-1000° C

1 x 10-6/°C

ASTM-C372

8.3

10.1

10.2

10.3

Specific Heat, 100° C

J/kg*K

ASTM-E1269

885

400

400

400

Thermal Shock Resistance, Tc

°C

NOTE 3

300

350

350

350

Maximum Use Temperature

°C

NO-LOAD COND.

1500

500

500

1500

Dielectric Strength

AC-kV/mm (AC V/mil)

ASTM-D116

9.0 (228)

9.4 (240)

9.4 (240)

9.0 (228)

Dielectric Constant, 1 MHz

25° C

ASTM-D150

10.6

28.0

28.0

29.0

Dielectric Loss (tan delta), 1 MHz

25° C

ASTM-D2520

0.0005

0.0010

0.0010

0.0010

Volume Resistivity, 25° C

ohm-cm

ASTM-D1829

> 1014

> 1013

> 1013

> 1013

Volume Resistivity, 500° C

ohm-cm

ASTM-D1829

2 x 109

2 x 105

2 x 105

2 x 104

Volume Resistivity, 1000° C

ohm-cm

ASTM-D1829

3 x 106

< 103

< 103

< 103

Impingement

NOTE 4

0.41

0.63

0.63

0.20

Rubbing

NOTE 4

0.49

0.57

0.57

0.20

Carbide Ceramics

 

 

 

SC-NB

SC-RB (SC-2)

SC-DS (SC-30)

SC-DSG (SC-35)

SC-DSLP (SC-50)

Properties*

Units

Test

Nitride Bonded Silicon Carbide

Reaction Bonded
Silicon Carbide

Direct Sintered Silicon Carbide

Graphite Loaded Sintered Silicon Carbide

Liquid Phase Sintered Silicon Carbide

Density

gm/cc

ASTM-C20

2.60

3.10

3.15

2.80

3.18

Crystal Size (Av.)

MICRONS

THIN-SECTION

12

5

5

8

Water Absorption

%

ASTM-373

8

0

0

0

0

Gas Permeability

0

0

0

Color

GRAY

BLACK

BLACK

BLACK

BLACK

Flexural Strength (MOR), 20° C

MPa (psi x 103)

ASTM-F417

48 (7)

462 (67)

480 (70)

220 (21)

540(78)

Elastic Modulus

GPa (psi x 106)

ASTM-C848

152 (22)

393 (57)

410 (59)

310 (32)

375

Poisson's Ratio. 20° C

ASTM-C848

0.20

0.21

0.18

0.21

Compressive Strength, 20° C

MPa (psi x 103)

ASTM-C773

140 (20)

2700 (363)

3500 (507)

675 (91)

Hardness

GPa (kg/mm2)

KNOOP 1000 gm

26 (2500)

26 (2800)

26 (2000)

24

 

 

ROCKWELL 45 N

Tensile Strength, 25° C

MPa (psi x 103)

ACMA TEST #4

307 (44.5)

Fracture Toughness, KIC

MPa m1/2

NOTCHED BEAM

4

4

3.2

6.9

Thermal Conductivity, 20° C

W/m °K

ASTM-C408

80.0

125.0

150.0

125.0

80.0

Coefficient of Thermal Expansion, 25-1000° C

1 x 10-6/°C

ASTM-C372

3.9

4.3

4.4

4.4

3.3

Specific Heat, 100° C

J/kg*K

ASTM-E1269

820

800

820

800

Thermal Shock Resistance, Tc

°C

NOTE 3

400

400

300

600

300

Maximum Use Temperature

°C

NO-LOAD COND.

1600

1000

1600

1600

1000

Dielectric Strength

AC-kV/mm (AC V/mil)

ASTM-D116

 

Dielectric Constant, 1 MHz

25° C

ASTM-D150

Dielectric Loss (tan delta), 1 MHz

25° C

ASTM-D2520

Volume Resistivity, 25° C

ohm-cm

ASTM-D1829

< 103

< 105

< 105

Volume Resistivity, 500° C

ohm-cm

ASTM-D1829

< 103

< 103

< 103

Volume Resistivity, 1000° C

ohm-cm

ASTM-D1829

< 103

< 103

< 103

Impingement

NOTE 4

0.14

0.12

Rubbing

NOTE 4

Carbide Ceramics (cont)

 

 

 

SC-BNL (SC-42)

WC

Pure SiCTM HR

Pure SiCTM LR

Properties*

Units

Test

Boron Nitride Loaded Reaction Bonded Silicon Carbide

Tungsten Carbide

Chemical Vapor Deposition (CVD) Silicon Carbide > 99.9995%

Chemical Vapor Deposition (CVD) Silicon Carbide > 99.9995%

Density

gm/cc

ASTM-C20

2.90

14.90

3.21

3.21

Crystal Size (Av.)

MICRONS

THIN-SECTION

12

2

3 - 10

3 - 10

Water Absorption

%

ASTM-373

0

0

0

0

Gas Permeability

0

0

0

0

Color

BLACK

GRAY

BLACK

BLACK

Flexural Strength (MOR), 20° C

MPa (psi x 103)

ASTM-F417

90

1550 (225)

468 (68)

517 (75)

Elastic Modulus

GPa (psi x 106)

ASTM-C848

150

627 (91)

462 (67)

434 (63)

Poisson's Ratio. 20° C

ASTM-C848

0.20

0.21

0.21

Compressive Strength, 20° C

MPa (psi x 103)

ASTM-C773

 

5000 (725)

Hardness

GPa (kg/mm2)

KNOOP 1000 gm

23

16 (1630)

27 (2750)

27 (2750)

 

 

ROCKWELL 45 N

Tensile Strength, 25° C

MPa (psi x 103)

ACMA TEST #4

Fracture Toughness, KIC

Mpa m1/2

NOTCHED BEAM

2.9

> 6

3.5

3.5

Thermal Conductivity, 20° C

W/m °K

ASTM-C408

100.0

100.0

115.0

115.0

Coefficient of Thermal Expansion, 25-1000° C

1 x 10-6/°C

ASTM-C372

3.5

5.1

4.6

4.6

Specific Heat, 100° C

J/kg*K

ASTM-E1269

665

665

Thermal Shock Resistance, Tc

°C

NOTE 3

137

Maximum Use Temperature

°C

NO-LOAD COND.

1000

1000

1600

1600

Dielectric Strength

AC-kV/mm (AC V/mil)

ASTM-D116

 

Dielectric Constant, 1 MHz

25° C

ASTM-D150

Dielectric Loss (tan delta), 1 MHz

25° C

ASTM-D2520

Volume Resistivity, 25° C

ohm-cm

ASTM-D1829

< 103

> 106

< 0.10

Volume Resistivity, 500° C

ohm-cm

ASTM-D1829

< 103

Volume Resistivity, 1000° C

ohm-cm

ASTM-D1829

< 103

Impingement

NOTE 4

0.12

0.03

0.02

Rubbing

NOTE 4

 

 

Source: CoorsTek

 

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