Normal spectral emissivity of niobium (at 900 nm) by a pulse-heating reflectometric technique
Anno: 1999
Autori: Righini F., Spisiak J., Bussolino GC.
Affiliazione autori: CNR Ist. di Metrologia G. Colonnetti, strada delle Cacce 73, 10135 Torino, Italy; Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia
Abstract: The normal spectral emissivity of niobium strip specimens was measured using a new pulse-heating reflectometric technique. The hemispherical spectral reflectivity of the surface of a strip tangent to an integrating sphere is determined by a high-speed lock-in technique. At the same time, the radiance temperature of the strip is measured by high-speed pyrometry from approximately 1000 K to the melting point. Details of the measurement method and of the related calibration techniques are reported. Results of the normal spectral emissivity of niobium at 900 nm from room temperature to its melting point are presented discussing differences related to the heating rate and to surface conditions.
Giornale/Rivista: INTERNATIONAL JOURNAL OF THERMOPHYSICS
Volume: 20 (4) Da Pagina: 1095 A: 1106
Maggiori informazioni: Vedecká Grantová Agentúra MŠVVaŠ SR a SAV, VEGA. – One of the authors (J.S.) gratefully acknowledgesthe financial support received from the Slovak Grant Agency (VEGA) under Contract2/5084/98. – Commissariat a lParole chiavi: high temperatures; niobium; normal spectral emissivity;; pulse heating; reflectometric techniquesDOI: 10.1023/A:1022602820071Citazioni: 29dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-21Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui