Light Nernst glower

The amount of radiation used is also important. A Nernst glower is used in ordinary infrared spectroscopy. This light source emits a relatively low amount of radiation, and no destruction of the analyzed material occurs. However, Raman infrared spectroscopy employs a radiation source of much greater energy. This radiation is sufficiently energetic to cause bond disruption and some destruction of the analyzed material. 

The infrared light source generates wideband radiation by heating solid materials to incandescence using electric power. There are two commonly used IR sources the Nernst glower, which is composed of mainly oxides of rare-earth elements and the Globar, which is... 

A source with somewhat lower intensity hut with longer life than the Globar or Nernst glower is a lightly wound spiral of nichrome wire heated to about 1100 K by an electrical current. A rhodium wire healer sealed in a ceramic cylinder has simil.ir properties, although it is more expensive. Nichrome wire stturees ire less... 

In any case Nernst s glower was not a success as a light bulb, either because of electrolyte decomposition or electrode loss of contact. However, for one particular application, stabilised zirconia is still used as a radiation source and this is Infra-Red spectroscopy (5). 

---