Both titanium and germanium were introduced into silicon dioxide system by sol-gel method to move its region of anomalous dispersion caused by IR resonance absorption towards the wavelength of CO 2 laser.It is indica...Both titanium and germanium were introduced into silicon dioxide system by sol-gel method to move its region of anomalous dispersion caused by IR resonance absorption towards the wavelength of CO 2 laser.It is indicated by IR absorption spectra that as the content of SiO 2 decreases in this glass system TiO 2 and GeO 2 tends to exist in their own phases.As for the gel glass with a composition of 40SiO 2·30TiO 2·30GeO 2,when the temperature is below 600℃,germanium atoms exist mainly in Ge-O-Ge bonds.With the temperature increasing from 800℃ to 1000℃, titanium atoms in Si-O-Ti bonds almost transform into Ti-O-Ti bonds.Furthermore,a large number of Si-O-Ti and Si-O-Ge bonds formed when the temperature approaches 800℃,which makes a notable IR absorption band round the wavelength of CO 2 laser.Therefore, sol-gel based SiO 2-TiO 2-GeO 2 gel glass is a candidate material for CO 2 laser hollow waveguide.展开更多
指出对于 Si O2 - Ti O2 凝胶玻璃涂层 ,即使 Ti O2 含量高达 80 % ,其对 CO2 激光波长 (10 .6 μm)的IR反射率值仍很低。而对于 Si O2 - Ti O2 - Ge O2 涂层 ,当 Ge O2 的含量从 2 0 %增加到 30 %时 ,其反射率峰逐步移向 CO2 激光波长 ...指出对于 Si O2 - Ti O2 凝胶玻璃涂层 ,即使 Ti O2 含量高达 80 % ,其对 CO2 激光波长 (10 .6 μm)的IR反射率值仍很低。而对于 Si O2 - Ti O2 - Ge O2 涂层 ,当 Ge O2 的含量从 2 0 %增加到 30 %时 ,其反射率峰逐步移向 CO2 激光波长 ,且在 10 .6 μm处获得了 2 0 %的反射率。但当 Ge O2 含量超过 35 %后 ,其 IR反射率降低到几乎为零。因此 ,4 0 Si O2 - 30 Ti O2 - 30 Ge O2 的凝胶玻璃涂层是较理想的。展开更多
文摘Both titanium and germanium were introduced into silicon dioxide system by sol-gel method to move its region of anomalous dispersion caused by IR resonance absorption towards the wavelength of CO 2 laser.It is indicated by IR absorption spectra that as the content of SiO 2 decreases in this glass system TiO 2 and GeO 2 tends to exist in their own phases.As for the gel glass with a composition of 40SiO 2·30TiO 2·30GeO 2,when the temperature is below 600℃,germanium atoms exist mainly in Ge-O-Ge bonds.With the temperature increasing from 800℃ to 1000℃, titanium atoms in Si-O-Ti bonds almost transform into Ti-O-Ti bonds.Furthermore,a large number of Si-O-Ti and Si-O-Ge bonds formed when the temperature approaches 800℃,which makes a notable IR absorption band round the wavelength of CO 2 laser.Therefore, sol-gel based SiO 2-TiO 2-GeO 2 gel glass is a candidate material for CO 2 laser hollow waveguide.
