抄録
We have studied the effect of the chlorine addition on the ultraviolet transmission property of soda-lime glasses to develop the ultraviolet penetration glass with soda-lime compositions. At first, a molecular-dynamics calculation is carried out to investigate how the addition of chlorine has influence on the non-bridged oxygen which causes the absorption of ultraviolet in the soda-lime glass. It is shown from the calculation that the chlorine addition reduces the amount of the non-bridged oxygen. Based on the result, we fabricate the soda-lime glasses containing chlorine by using a platinum crucible, and then measure the transmittance of ultraviolet at 260 nm wavelength. Apparent improvement of ultraviolet transmittance of the soda-lime glasses is confirmed from the measurements. As a result, improvement of ultraviolet transmittance is below 10%, so enough improvement of ultraviolet transmittance is not available by addition of chlorine.
