The Effect of Cobalt oxide (CoO) and Praseodymium oxide (Pr2O3) on the spectroscopic properties in filter glass



Filter glass for eye protection from glass blowing work can be prepared by doping elements that absorb the visible and infrared light. In the commercial filter glass studies, cobalt oxide and rare earth are usually used to dope in filter glass. In our experiment, the filter glass was made of clear glass that has a composition as glass lens then doped with CoO 0.02 , 0.04, 0.15%wt and Pr2O3 0.5, 0.8, 1.2, 2.4, 3.6, 4.8 %wt respectively.  The resulting glass was characterized using UV/Vis spectrophotometer. It showed that the glass can absorb vis and IR light in the range of 250-2500 nm similarly to  the commercial filter glass. Moreover, it was found that doping CoO 0.15 %wt and Pr2O3 4.8 %wt can reduce the transmittance to 10.7% at wavelength of 594 nm and 59.3% at wavelength of 1620 nm. These results shown that the filter glass can be developed as protection equipment for glass blowing.

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