Measuring normal spectral emissivities of niobium by a pulse-heating technique： 1000 K to the melting point-中国Betway体育网页登陆

摘要 Thenormalspectralemissivityofniobiumstripspecimenismeasuredusinganewpulse-heatingreflectometrictechnique.Thehemisphericalspectralreflectivityofthesurfaceofastriptangenttoanintegratingsphereisdeterminedbyahigh-speedlock-intechnique.Atthesametime,theradiancetem-peratureofthestripismeasuredbythemulti-wavelengthhigh-speedpyrometerfromapproximately1000Ktothemeltingpoint.Detailsofthemeasurementmethodandoftherelatedcalibrationtechniquesarereported.Resultsofthenormalspectralemissivityofniobiumat633,753,827,and905nmfromroomtemperaturetoitsmeltingpointarepresented.Theaccuracyofspectralemissivitiesisestimatedbetterthan5%.

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Measuring normal spectral emissivities of niobium by a pulse-heating technique： 1000 K to the melting point

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