ELEKTRISCHE LAMPE

摘要

Because of the heavy thermal stress, high-load electric lamps have a quartz-glass lamp bulb. During operation, these lamps produce high-energy UV radiation which is transmitted almost unattenuated by the quartz-glass vessel and which is in many cases undesirable and even harmful. The novel lamps therefore have on their lamp bulb (1) a UV-absorbing coating (6) containing CeF3 and Al2O3.SiO2 in a ratio by weight of 2:1. To produce the coating, a suspension of CeF3 and Al2O3.SiO2 in industrial alcohol is prepared and finely ground. After further dilution with industrial alcohol and possibly adding nitrocellulose as a binder, the suspension is applied to the lamp bulb (1), dried and then fired.