EKHI is an open, publication-centred database of optical and thermal radiative properties of solid materials: curve-level spectral datasets with explicit provenance, machine-readable downloads, and citation tools. It is developed and maintained by the Thermomat group at the University of the Basque Country (UPV/EHU) and formally described in Scientific Data (2026).
Counts as published in the Scientific Data descriptor (doi:10.1038/s41597-026-07083-9), January 2026. This page is updated at each EKHI data release, not live.
EKHI is organised around scientific publications, reflecting how radiative and optical data are generated, validated, and cited. Users search by title, abstract keywords, authors, or DOI; each publication record exposes one or more dataset entries, each corresponding to a single curve or a well-defined set of curves with its experimental context: material, measured or derived property, temperature, wavelength range, measurement geometry, and specimen notes.
The initial corpus digitizes emittance, reflectance, transmittance, and absorptance curves from the TPRC Data Series (Touloukian et al., Thermophysical Properties of Matter), with a documented digitization workflow, quality controls, and full traceability to the original cited publications — designed to support the FAIR principles.
Every dataset can be inspected as a table, downloaded in machine-readable form (JSON), and traced through an explicit provenance chain: original publication DOI → TPRC volume, table, and curve identifier → EKHI record.
Constructing spectral emissivity from reflectance and transmittance data in the opaque or semitransparent limits; benchmarking emissometers and spectro-reflectometers against canonical compilation curves; assembling labelled spectral datasets for modelling and machine-learning studies; and teaching radiative heat transfer with real, citable curves instead of digitized figures.
EKHI grows by indexing published, peer-reviewed data with full provenance. If you have published spectral radiative-property data that should be indexed, see how to contribute.
Figures on this page come from the EKHI descriptor in Scientific Data (doi:10.1038/s41597-026-07083-9) and the live database at thermomat.ehu.eus/ekhi. Last revised: 2026-06-11.