Tabulated Properties of Ceramics, Plastics, and Metals Typical Properties of Ceramics Materials
Coeff. of Expansion b
Tensile Strength
Thermal Conductivity d
Dielectric Strength (V/mil)
Flexural Strength (10 3 psi)
Operating Temp. ( ° F)
Compressive Strength (10 3 psi)
Density a
Mohs’s Hardness c
Material
lb/in 3
g/cm3
10 − 6 in/in- ° F 10 − 6 m/m- ° C
10 3 psi MPa
(Btu-ft/hr-ft 2 - ° F) W/(m-k)
2.49 3.04 2.77
1000 400 380
4.1–7.0
7.38–12.6
48 RA 1472
… … 50 … … 40 … … 32
0.85 0.24 0.34
1.47 0.42 0.59
0.09 0.11 0.10
6
10.8 9.4
15 14
5.5 5.0
700 1100
Machinable Glass Ceramic
5.2
0.09–0.10 2.49–2.77 400
10.5–11.2 18.9–20.2 12.5–13 90 RH 750
6 5
41 34
40–45
0.24–0.29
0.41–0.50
Machining Grades
0.10
2.77
380
9.4
16.9
11
90 RH 1100
32
0.34
0.59
Glass-Mica
0.13–0.17 3.60–4.70 300–325 11–11.5
19.8–20.7
9–10
90 RH 700–750 6–6.5 41–45 33–35
0.29–0.31
0.50–0.54
Molding Grades
0.14 0.10 0.08 0.08 0.03 0.14 0.08 0.11 0.21 0.11 0.11 0.06 0.08 0.09
3.88 2.77 2.21 2.21 0.83 3.88 2.21 3.04 5.81 3.04 3.04 1.66 2.21 2.49 3.60 3.88 3.88
350
10.3 2.5 2.9
18.5 4.5 5.2
9
90 RH 1300
6
41
30
0.3 0.92 0.75 0.38 0.10
0.52 1.59 1.30 0.66 0.17 1.59 0.69 2.92 …
80
4.5 10 0.4 20
1–2 6.0
1000 2100 2000 1800 2000 2800 1825 1825
… … 12 … … 25 … … … … … 1.4
Aluminum Silicate Alumina Silicate Silica Foam TiO 2 (Titania) Lava (Grade A) Zirconium Phosphate ZrO 2 ·SiO 2 (Zircon) 2MgO·SiO 2 (Forsterite) MgO·SiO 2 (Steatite) 2MgO·2Al 2 O 3 ·5SiO 2 (Cordierite) ZrO 2
100
70 80
… 0.3
… … … 2370
0.5 8.3 3.3 0.9
NA
100 80 NA 220 240
4.61 1.83 0.5 1.94 5.56
8 6
7.5 2.5
52 17
100
…
9
40
0.92
7.5 102
NA
… … 30
0.4 (approx.)
… 6.1
11.0
1300 HV … … … 261
1.69
3.5
16 20
7.5 7.5 7.5 6.5
10 10
69 69
90 85
…
…
10.0
4.58
7.93
0.09–0.10 2.49–2.77 210–240 3.83–5.44 6.89–9.79
18–21
1825 8.5–10 59–69 80–90
3.17–3.42
5.49–5.92
60
0.33
0.6
3.4
2000
2.5
17
18.5
1.00 1.00 1.83
1.73 1.73 3.17
100–172 1.22–1.28 2.20–2.30
8–12
7–7.5
2000 3.5–3.7 24–25 30–40
200 210
1.33 3.33
2.4 6.0 6.7 6.8
15 44 70 72
8 9 9 9 9
2000 2700 2700 2900
4
28
50
Al 2 O 3
94% 0.13
20 138
315 375 380
16.00
27.69
(Alumina)
96% 0.13–0.14 3.60–3.88 210
3.5–3.7
6.3–6.6
48–60
2600–2800 25 172
20.3–20.7 35.13–35.8
99.5% 0.14 99.9% 0.14
200
3.72
28 193
21.25
36.78
… 3.75 … a Obtain specific gravity by dividing density in lb/in 3 by 0.0361; for density in lb/ft 3 , multiply lb/in 3 by 1728; for kg/m 3 , multiply density in lb/in 3 by 27,679.9. b To convert coefficient of expansion to 10 –6 in/in-°C, multiply table value by 1.8. c Mohs’s Hardness scale is used unless otherwise indicated as follows: RA and RH for Rockwell A and H scales, respectively; HV for Vickers hardness. d To convert conductivity from Btu-ft/hr-ft 2 -°F to cal-cm/sec-cm 2 -°C, divide by 241.9. … … 400 …
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