A correlation between normal and hemispherical emissivity of low-emissivity coatings on glass

Emissivity: A Program for Atomic Emissivity Calculations

Controlled Emissivity Coatings to Delay Ignition of Polyethylene

Semi-opaque to opaque films containing small amounts of various aluminium particles to decrease emissivity were easily prepared and coated onto low-density polyethylene (LDPE) sheets. The thermal-radiative properties (reflectivity, transmissivity and absorptivity) of the films were measured and related to the aluminum particles' content, size and nature. Time-to-ignition of samples was assessed...

Hemispherical total emissivity and specific heat capacity of deeply undercooled Zr41.2Ti13.8Cu12.5Ni10.0Be22.5 melts

High-temperature high-vacuum electrostatic levitation ~HTHVESL! and differential scanning calorimetry ~DSC! were combined to determine the hemispherical total emissivity eT , and the specific heat capacity cp , of the undercooled liquid and throughout the glass transition of the Zr41.2Ti13.8Cu12.5Ni10.0Be22.5 bulk metallic glass forming alloy. The ratio of cp /eT as a function of undercooling w...

Low emissivity high-temperature tantalum thin film coatings for silicon devices

The authors study the use of thin ( 230 nm) tantalum (Ta) layers on silicon (Si) as a low emissivity (high reflectivity) coating for high-temperature Si devices. Such coatings are critical to reduce parasitic radiation loss, which is one of the dominant loss mechanisms at high temperatures (above 700 C). The key factors to achieve such a coating are low emissivity in the near infrared and super...

A Lookup Table-Based Method for Estimating Sea Surface Hemispherical Broadband Emissivity Values (8-13.5 μm)

Sea surface hemispherical broadband emissivity (BBE, 8–13.5 μm) is a vital parameter for calculating surface radiation budgets. Such data are currently unavailable. This paper proposes a lookup table-based method for retrieving sea surface hemispherical BBE values. The physically-based sea surface emissivity model of Wu and Smith, together with the optimal refractive index, were used to generat...