Candoluminescence and radical-excited luminescence
Abstract
The literature on the emission of solids heated in flames or excited by gases containing free radicals or excited molecules is reviewed. Many different emission processes can occur, including selective thermal radiation, candoluminescence, surface chemiluminescence, adsorboluminescence, and chemisorptive luminescence. These effects occur in a wide variety of materials, including BN, various oxides (MgO, ZnO, Y 2O 3, etc.), many impurity-activated phosphors (CaO:Bi, ZnS: Cu, Zn 2SiO 4:Mn, etc.), and organic compounds. Emission may be excited by a number of radicals, including H, O, OH, N, CO and CH. In a flame, the catalytic activity of the solid surface for radical recombination or de-excitation influences both the excitation of luminescence and the temperature of the solid (and hence the incandescence). An outstanding example of high-temperature candoluminescence is the Welsbach mantle (ThO 2 : Ce).
- Publication:
-
Journal of Luminescence
- Pub Date:
- January 1974
- DOI:
- 10.1016/0022-2313(74)90001-5
- Bibcode:
- 1974JLum....8..271I