Spectral and total thermal emissivities of oxide-coated cathodes

George E. Moore, H. W. Allison

No abstract provided

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Materials
Curve 1
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL23; coated with oxide; heated in hydrogen at 1098 K for 15 min.
Curve 2
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL27; coated with oxide; heated at 1098 K in hydrogen for 15 min.
Curve 3
Wavelength μ: 0.65 Temperature Range, K: 933-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (filament used in the radio tube type DM212); heated at 1098 K in hydrogen for 15 min; authors assumed α = ε.
Curve 4
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (filament used in the radio tube type DM214); heated at 1098 K in hydrogen for 15 min; authors assumed α = ε.
Curve 5
Wavelength μ: 0.65 Temperature Range, K: 1013-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (filament used in the radio tube type DB216); heated in hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 6
Wavelength μ: 0.65 Temperature Range, K: 933-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (filament used in the radio tube type DM215); heated in hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 7
Wavelength μ: 0.65 Temperature Range, K: 1033-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (filament used in the radio tube type DM214); heated at 1098 K in hydrogen for 15 min; authors assumed α = ε.
Curve 8
Wavelength μ: 0.65 Temperature Range, K: 913-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (filament used in the radio tube type DM213); heated at 1098 K in hydrogen for 15 min; authors assumed α = ε.
Curve 9
Wavelength μ: 0.65 Temperature Range, K: 953-1233 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (filament used in the radio tube type DB215); heated in hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 10
Wavelength μ: 0.65 Temperature Range, K: 1053-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (filament used in the radio tube type DB214); heated in hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 11
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (filament used in the radio tube type DM212); heated at 1098 K in hydrogen for 15 min; authors assumed α = ε.
Curve 12
Wavelength μ: 0.65 Temperature Range, K: 973-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL23; coated with oxide; authors assumed α = ε.
Curve 13
Wavelength μ: 0.65 Temperature Range, K: 953-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL22; coated with oxide; authors assumed α = ε.
Curve 14
Wavelength μ: 0.65 Temperature Range, K: 913-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DB218; coated with oxide; heated in hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 15
Wavelength μ: 0.65 Temperature Range, K: 1033-1233 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DB217; coated with oxide; heated in hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 16
Wavelength μ: 0.65 Temperature Range, K: 973-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL27; coated with oxide; heated in hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 17
Wavelength μ: 0.65 Temperature Range, K: 933-1253 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL25; coated with oxide; heated in hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 18
Wavelength μ: 0.65 Temperature Range, K: 973-1273 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL24; coated with oxide; heated hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 19
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL24; coated with oxide; heated in hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 20
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL27; coated with oxide; heated in hydrogen at 1098 K for 15 min; authors assumed α = ε.
Curve 21
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL23; coated with oxide; authors assumed α = ε.
Curve 22
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (Filament used in the radio tube type DM214); heated in hydrogen at 1098 K for 15 min.
Curve 23
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Grade A Nickel; 99+ percent pure with Co, Fe, Mn, Cu, and C impurities (Filament used in the radio tube type DM212); heated in hydrogen at 1098 K for 15 min.
Curve 1
Temperature Range, K: 973-1273 Reported Error, %: < 1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL24; coated with oxide; heated in hydrogen at 1098 K for 15 min.
Curve 2
Temperature Range, K: 933-1253 Reported Error, %: < 1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL25; coated with oxide; heated in hydrogen at 1098 K for 15 min.
Curve 3
Temperature Range, K: 973-1273 Reported Error, %: < 1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DL27; coated with oxide; heated in hydrogen at 1098 K for 15 min.
Curve 4
Temperature Range, K: 1033-1233 Reported Error, %: < 1 Composition (weight percent), Specifications and Remarks: Filament used in the radio tube type DB217; coated with oxide; heated in hydrogen at 1098 K for 15 min.
Curve 1
Temperature Range, K: 973-1213 Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Konel; nominal composition: 73. 07 Ni, 17. 16 Co, 8. 8 Ti, 0. 55 Si, 0. 26 Al, 0.16 Mn; filament used in type DL20 radio tube; coated with oxide; heated in hydrogen at 1098 K for 15 min.
Curve 2
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Konel; nominal composition: 73. 07 Ni, 17. 16 Co, 8. 8 Ti, 0. 55 Si, 0. 26 Al, 0.16 Mn; filament used in type DL20 radio tube; coated with oxide; heated in hydrogen at 1098 K for 15 min.
Curve 3
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Different sample, same as above specimen and conditions except authors assumed α = ϵ.
Curve 4
Wavelength μ: 0.65 Temperature Range, K: 973-1213 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Different sample, same as above specimen and conditions.
Curve 5
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Different sample, same as curve 1 specimen and conditions except filament used in type DL21 radio tube.
Curve 6
Wavelength μ: 0.65 Temperature Range, K: 1013-1213 Geometry θ': ~0° Reported Error, %: <1 Composition (weight percent), Specifications and Remarks: Different sample, same as above specimen and conditions except authors assumed α = ϵ.
Curve 7
Wavelength μ: 0.65 Temperature Range, K: 298 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Different sample, same as above specimen and conditions.