Glass substrate for information recording medium and information recording medium
作者： Hideki Kawai
DOI:
关键词:
摘要: A glass substrate for information recording medium, said being composed of an alminosilicate containing 60-75% by mass SiO2, 5-18% Al2O3, 3-10% Li2O, 3-15% Na2O and 0.5-8% ZrO2 relative to the entire components. The medium contains neither As (arsenic) nor Sb (antimony), while at least one polyvalent element selected from group consisting V (vanadium), Mn (manganese), Ni (nickel), Nb (niobium), Mo (molybdenum), Sn (tin), Ce (cerium), Ta (tantalum) Bi (bismuth). molar ratio total amount elements is within range 0.05-0.50.
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