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熱電偶材料的物理性質(zhì)
發(fā)布時(shí)間：2022-03-23點(diǎn)擊次數(shù)：1468次
| 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 |
 |  |  |  |  |  |  |  |  |  |  |  | |
| 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。
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