Objective
The heat emitted by radiation depends essentially on the emissivity of the surface of the material; polished metals have a very low emissivity and therefore emit little radiation, black surfaces have a high emissivity. Emissivity is thus fundamental in all temperature measurements by optical means since the amount of radiation recorded by a pyrometer can only be converted into temperature through the Planck law if one knows the emissivity of the surface. This is a major problem that makes it almost impossible to measure accurately temperature by optical means if the material surface is non-uniform.
The project involves the comparison of spectral emissivity measurements at 500 C on a black-body with those taken normal to the surfaces of low and medium emissivity materials (platinum, stainless steel and silicon carbide or graphite) at 3 wavelengths (2.26 3.79 and 5.06 um). Instead of using a black-body reference, one laboratory (IMGC) used an integrating sphere reflectometer and an infrared thermometer.
RESULTS
In a first phase that did not involve IMGC, the agreement between the laboratories was not good, and the normal spectral emissivity values obtained by the different laboratories varied by more than 0.2 in some cases. The agreement was improved when the results from 2 laboratories were corrected as a result of re-calibrations of their commercial black-body cavities against an NPL standard.
In a second phase, involving only IMGC and NPL, very good agreement was obtained, even though the techniques used by the two laboratories were very different. All the normal spectral emissivity values agreed to within 0.02 and there appeared to be no systematic differences.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences chemical sciences inorganic chemistry inorganic compounds
- natural sciences chemical sciences inorganic chemistry transition metals
- natural sciences chemical sciences inorganic chemistry metalloids
- social sciences law
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Programme(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
TW11 0LW Teddington
United Kingdom
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.