TWI848909B

To obtain a glass having a relative partial dispersion (θg, F) and an Abbe number (νd) fulfilling the relation of (-0.00162×νd+0.625)≤(θg, F)≤(-0.00162×νd+0.660), and also having high acid resistance.SOLUTION: The glass contains, by mass%, 20.0% to 60.0% of P2O5 component, 5.0% to 45.0% of BaO compo...

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Hauptverfasser:	IWASAKI, NANA, NINOMIYA, AKIHIRO
Format:	Patent
Sprache:	chi
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Zusammenfassung:	To obtain a glass having a relative partial dispersion (θg, F) and an Abbe number (νd) fulfilling the relation of (-0.00162×νd+0.625)≤(θg, F)≤(-0.00162×νd+0.660), and also having high acid resistance.SOLUTION: The glass contains, by mass%, 20.0% to 60.0% of P2O5 component, 5.0% to 45.0% of BaO component, and more than 0% to 15.0% of Ln2O3 component (where, Ln is at least one selected from the group consisting of La, Gd, Y, Yb); has a partial dispersion (θg, F) and an Abbe number (νd) fulfilling the relation of (-0.00162×νd+0.625)≤(θg, F)≤(-0.00162×νd+0.660); and has a chemical durability (acid resistance) by the powder method of 1 to 5.SELECTED DRAWING: Figure 2