EKHI

Materials

Curve 1

Temperature Range, K: 300-3540 Composition (weight percent), Specifications and Remarks: Tungsten filaments aged 24 hrs at 2400 K; measured in vacuum; smoothed values.

Temperature / K	Emittance /
300	0.0237
400	0.033
500	0.0421
600	0.0514
700	0.0626
800	0.0755
900	0.0904
1000	0.1069
1100	0.1247
1200	0.1435
1300	0.1625
1400	0.1813
1500	0.1995
1600	0.217
1700	0.2338
1800	0.2494
1900	0.2643
2000	0.2785
2100	0.292
2200	0.3046
2300	0.3174
2400	0.329
2500	0.3407
2600	0.3517
2700	0.3625
2800	0.3733
2900	0.3839
3000	0.3941
3100	0.4041
3200	0.4142
3300	0.4239
3400	0.4334
3500	0.4428
3540	0.4467

The characteristics of tungsten filaments as functions of temperature