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熱電偶材料的
物理性質(zhì)
| 性質(zhì) | J 鐵 |
J, C, T 康銅 |
T 銅 |
K, E 鎳鉻合金 |
K 鋁鎳合金 |
N 鎳鉻硅合金 |
N 鎳硅合金 |
R Pt13% Rh | S Pt10% Rh | R,S 鉑 | B Pt30% Rh | B Pt6% Rh |
| 熔點(diǎn) （固相線溫度） ?C ?F |
1490 2715 |
1220 2228 |
1083 1981 |
1427 2600 |
1399 2550 |
1420 2590 |
1330 2425 |
1860 3380 |
1850 3362 |
1769 3216 |
1927 3501 |
1826 3319 |
|
電阻率
μΩ·cm 0?C時(shí) 20?C時(shí)
Ω cmil/ft
0?C時(shí) 20?C時(shí) |
8.57 9.67 51.5 58.2 |
48.9 48.9 294.2 294 |
1.56 1.724 9.38 10.37 |
70 70.6 421 425 |
28.1 29.4 169 177 |
97.4 97.8 |
32.5 34.6 |
19.0 19.6 114.3 117.7 |
18.4 18.9 110.7 114.0 |
9.83 10.4 59.1 62.4 |
19.0 114.5 |
17.5 106 |
| 電阻的溫度系數(shù) Ω/Ω· ?C (0 ~ 100?C) |
65 x 10-4 | -0.1 x 10-4 | 43 x 10-4 | 4.1 x 10-4 | 23.9 x 10-4 | 13.3 x 10-4 | 12.1 x 10-4 | 15.6 x 10-4 | 16.6 x 10-4 | 39.2 x 10-4 | 13.3 x 10-4 | 20.6 x 10-4 |
| 熱膨脹系數(shù) in./in. ?C (20 ~ 100?C) |
11.7 x 10-6 | 14.9 x 10-6 | 16.6 x 10-6 | 13.1 x 10-6 | 12.0 x 10-6 | 9.0 x 10-6 | 9.0 x 10-6 | 9.0 x 10-6 | ||||
|
100?C時(shí)的導(dǎo)熱率 Cal·cm/s·cm2·?C BTU·ft/h·ft2·?F |
0.162 39.2 |
0.0506 12.2 |
0.901 218 |
0.046 11.1 |
0.071 17.2 |
0.0358 8.67 |
0.0664 16.07 |
0.088 21.3 |
0.090 21.8 |
0.171 41.4 |
||
|
20?C時(shí)的比熱， cal/ g·?C |
0.107 | 0.094 | 0.092 | 0.107 | 0.125 | 0.11 8.52 |
0.12 8.70 |
0.032 | ||||
|
密度
g/cm3 lb/in3 |
7.86 0.284 |
8.92 0.322 |
8.92 0.322 |
8.73 0.315 |
8.60 0.311 |
0.3078 |
0.3143 | 19.61 0.708 |
19.97 0.721 |
21.45 0.775 |
17.60 0.636 |
20.55 0.743 |
|
抗張強(qiáng)度
（已退火 MPa psi |
345 50,000 |
552 80,000 |
241 35,000 |
655 95,000 |
586 85,000 |
690 100,000 |
621 90,000 |
317 46,000 |
310 45,000 |
138 20,000 |
483 483 |
276 40,000 |
| 磁吸引力 | 強(qiáng) | 無 | 無 | 無 | 中 | 無 | 無 | 無 | 無 | 無 | 無 | 無 |
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| N=負(fù)極 P=正極 |
JP | JN,TN ENa |
TP | KP, EP |
KN | NP | NN | RP | SP | RN, SN |
BP | BN |
| 元件 | 公稱化學(xué)成分，% | |||||||||||
| 鐵 | 99.5 | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 碳 | b | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 錳 | b | ... | ... | ... | 2 | ... | ... | ... | ... | ... | ... | ... |
| 硫 | b | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 磷 | b | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 磷 | b | ... | ... | ... | 1 | 1.4 | 4.4 | ... | ... | ... | ... | ... |
| 鎳 | b | 45 | ... | 90 | 95 | 84.4 | 95.5 | ... | ... | ... | ... | ... |
| 銅 | b | 55 | 100 | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 鉻 | b | ... | ... | 10 | ... | 14.2 | ... | ... | ... | ... | ... | ... |
| 鋁 | ... | ... | ... | ... | 2 | ... | ... | ... | ... | ... | ... | ... |
| 鉑 | ... | ... | ... | ... | ... | ... | ... | 87 | 90 | 100 | 70.4 | 93.9 |
| 銠 | ... | ... | ... | ... | ... | ... | ... | 13 | 10 | ... | 29.6 | 6.1 |
| 銠 | ... | ... | ... | ... | ... | ... | ... | 13 | 10 | ... | 29.6 | 6.1 |
| ... | ... | ... | ... | ... | ... | ... | 0.15 | ... | ... | ... | ... | ... |
| ... | ... | ... | ... | ... | ... | ... | 0.15 | ... | ... | ... | ... | ... |
aJN、TN和EN型熱電偶通常包含少量的各種元素來控制熱電動(dòng)勢，相應(yīng)減少鎳成分或銅成分，或二者均減少。
b熱電鐵 (JP)包含少量這些元素，但含量不同。