For the measurement of the temperature dependant spectral emissivity as well as of the total emissivity from 300 °C to 2 500 °C two devices are available at IKE at the University of Stuttgart in Germany. The IKE Group on Thermophysical Properties has been working on research projects in the field of thermophysical properties, like emissivity for pyrometry for more than twenty years.
Posts in category Solids & Liquids
“The Thermophysical Properties of Matter Database (TPMD), contains thermophysical properties of over 5,000 materials with approximately 50,000 data curves. This database is searchable by material, by property, or by partial string (name). For all data curves, the material composition, experimental conditions, raw or smoothed data, and references are given. Dynamic graphing capabilities allow users to compare the same property of multiple materials, change scale ranges, and export and import data. The database is continually updated and expanded.”
“CINDAS LLC Pricing: Pricing for the database is determined based on company size and number of users. Special discounts are available for Academic organizations.”
Contact CINDAS LLC to obtain pricing for your specific organization. They will be happy to develop a quote for you:
Phone: 765-807-5400 or 765-807-6052
Phone (Toll free US and Canada): 1-800-696-7549
This link enables one to download the 54 page introductory section of the CINDAS book (9.5 MB pdf), Thermophysical Properties of Matter, Vol. 7 Edited by Y.S. Touloukian and D.P. DeWitt IFC/Plenum -1970. It contains some excellent details on the meaning of emissivity, its terminology, the measurement techniques of 1970 and an introduction to the data organization of the full volume.
“The emissivity of metals often changes with wavelength. This means it is very difficult to determine what emissivity should be entered in passive, traditional pyrometers (all those that do not determine the emissivity during measurement). An example or two will show the difficulty.”
The graphs shown are from the “Thermophysical Properties of Matter ” vol 7; Thermal Radiative Properties, Ed By Y.S. Touloukian and D.P Dewitt, IFI-Plenum, New York 1970.
The original graphs in that volume were accompanied by the data represented by each curve, the literature citation for each and a description of the measurement and sample details represented by each curve.