Mjerenje desorpcije iz polikristalnog sloja TiO2 u nitnim žaruljama

The pressure increase due to the desorption was measured in closed vacuum systems of incandescent lamps with tungsten filament. The inside surface of the glass bulbs was covered with light diffusing layer of TiO2. Pressure differences were measured in clear lamps and lamps frosted with TiO2. Desorption was stimulated by increasing the temperature for fixed intervals of time. Pressure was determined from the filament I-V characteristics that were transformed to a linear plot. At 210 °C, desorption was approximately four times higher in TiO2 coated lamps than in clear lamps.Povećanje tlaka zbog desorpcije mjereno je u zatvorenim vakuumskim žarulja s volframovom niti. Unutarnja strana stijenki bila je prekrivena svjetlo-difuznim slojem TiO2. Uspoređivale su se prozirne i ’bijele’ žarulje. Desorpcija je stimulirana zagrijavanjem tijekom određenog intervala vremena. Tlak se mjerio određivanjem I −V karakteristika žarne niti. Pri 210 ◦C ustanovljeno je da je desorpcija iz žarulja s TiO2 oko četiri puta veća nego u prozirnim žaruljama