热电偶材料的
物理性质
|
性质
|
J
铁
|
J, C, T
康铜
|
T
铜
|
K, E
镍铬合金
|
K
铝镍合金
|
N
镍铬硅合金
|
N
镍硅合金
|
R Pt13% Rh
|
S Pt10% Rh
|
R,S 铂
|
B Pt30% Rh
|
B Pt6% Rh
|
熔点
（固相线温度）
?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
|
|
电阻率
μΩ·cm
0?C时
20?C时
Ω cmil/ft
0?C时
20?C时
|
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
|
电阻的温度系数
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
|
热膨胀系数
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时的导热率
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时的比热，
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
|
抗张强度 （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
|
强
|
无
|
无
|
无
|
中
|
无
|
无
|
无
|
无
|
无
|
无
|
无
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
N=负极
P=正极
|
JP
|
JN,TN
ENa
|
TP
|
KP,
EP
|
KN
|
NP
|
NN
|
RP
|
SP
|
RN,
SN
|
BP
|
BN
|
|
元件
|
公称化学成分，%
|
|
铁
|
99.5
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
|
碳
|
b
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
|
锰
|
b
|
...
|
...
|
...
|
2
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
|
硫
|
b
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
|
磷
|
b
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
|
磷
|
b
|
...
|
...
|
...
|
1
|
1.4
|
4.4
|
...
|
...
|
...
|
...
|
...
|
|
镍
|
b
|
45
|
...
|
90
|
95
|
84.4
|
95.5
|
...
|
...
|
...
|
...
|
...
|
|
铜
|
b
|
55
|
100
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
|
铬
|
b
|
...
|
...
|
10
|
...
|
14.2
|
...
|
...
|
...
|
...
|
...
|
...
|
|
铝
|
...
|
...
|
...
|
...
|
2
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
|
铂
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
87
|
90
|
100
|
70.4
|
93.9
|
|
铑
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
13
|
10
|
...
|
29.6
|
6.1
|
|
铑
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
13
|
10
|
...
|
29.6
|
6.1
|
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
0.15
|
...
|
...
|
...
|
...
|
...
|
|
...
|
...
|
...
|
...
|
...
|
...
|
...
|
0.15
|
...
|
...
|
...
|
...
|
...
|
aJN、TN和EN型热电偶通常包含少量的各种元素来控制热电动势，相应减少镍成分或铜成分，或二者均减少。
b热电铁 (JP)包含少量这些元素，但含量不同。
