| 摘要 |
PURPOSE:To obtain the titled phosphate glass having high chemical durability without deteriorating the transmittance by adding a specified amt. of CuO to base glass contg. the oxides of P, Al, B, Si, Ba, Mg, Ca, Sr, Y, La, Zr, Ta, Ti, and Pb in a specified ratio. CONSTITUTION:CuO is incorporated by 0.4-15.0pts.wt. into 100pts.wt. base glass consisting, by weight, of 60-90% P2O5, 7.5-20% Al2O3, 0-15% total amt. of B2O3 and SiO2, 1-25% total amt. of BaO, MgO, CaO, and SrO, 0-15% total amt. of Y2O3, La2O3, ZrO2, Ta2O5, and TiO2, and 0-10% PbO. Consequently, the phosphate glass having excellent chemical durability and spectral transmittance and capable of being utilized in filter glass which is used for the color correction of a color VTR camera is obtained.
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