FACTOID #53: If you thought Antarctica was inhospitable, think again - its land area is only ninety-eight percent ice. Reassuringly, the other 2% is categorised as "barren rock".
The Nernst glower is an obsolete device for providing a continuous source of (near) infrared radiation for use in spectroscopy. Typically it was in the form of a cylindrical rod or tube composed of a mixture of certain oxides such as zirconium oxide (ZrO2), yttrium oxide (Y2O3) and erbium oxide (Er2O3) at a ratio of 90:7:3 by weight. They operated by being electrically heated to about 2000 °C. Initially they required external heating because the material is an insulator at room temperature. Image of a small dog taken in mid-infrared (thermal) light (false color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. ... Extremely high resolution spectrum of the Sun showing thousands of elemental absorption lines (fraunhofer lines) Spectroscopy is the study of matter and its properties by investigating light, sound, or particles that are emitted, absorbed or scattered by the matter under investigation. ... Zirconia (ZrO2) is a white crystalline oxide of zirconium that is used as a refractory, in insulation, abrasives, enamels and glazes. ... Yttrium oxide is an oxide of yttrium. ... Erbium(III) oxide, a pink solid, is a compound of erbium sometimes used as a colouring for glasses and a dopant for optical fibres and optical amplifiers. ... This article or section is in need of attention from an expert on the subject. ...
It has been replaced by a similar device known as a globar made of silicon carbide (SiC) that operates at about 1100 °C. The globar does not require an external preheater as it is an electrical conductor at any temperature. It is also better suited for use in evacuated systems. the way I feel as I walk thru HEB, and the underpaid employees look at me and the front office (not necarilly Melanie who is really hot and speaks in a really low voice) A Globar is a silicon carbide bar of 5 to 10 mm width and 20 to 50 mm length which is electrically heated up to 1800 to 3000 degrees Fahrenheit (equivalent to 982 to 1649 degrees Celsius or 1255 to 1922 Kelvin) with a downstream variable interference filter. ... Silicon carbide (SiC) is a ceramic compound of silicon and carbon. ...
Nernst contributed to electrochemistry, thermodynamics, solid state chemistry and photochemistry.
Nernst invented, in 1898, the Nernst lamp, an electric lamp using an incandescent ceramic rod (the successor to the carbon lamp and the precursor to the incandescent lamp).
His Nernstglower, important in the field of spectroscopy, is a solid-body radiator with a filament of rare-earth oxides.
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