Spontaneous oxygen loading into SiO2 glass by thermal anneal
摘要
The interstitial oxygen molecules (O2) in SiO2 glass were detected down to 芒芒芒1015cm芒芒芒3 by photoluminescence of O2 at 1272nm excited at 765nm by a continuous-wave titanium sapphire laser. It was evidenced that SiO2 glass thermally annealed in air between 800 and 1100芒芒C spontaneously absorbs 芒芒芒1016cm芒芒芒3 of O2 from the ambient atmosphere. The time-dependent concentration change of the interstitial O2 allows the determination of both the diffusion coefficient and the solubility of the interstitial O2.