Disclosed is a glass composition which can be suitably used as a glass filler to be blended into a polycarbonate resin. This glass composition contains, in mass %, 50≦SiO2≦60, 8≦Al2O3≦15, 0≦MgO≦10, 10≦CaO≦30, 0≦Li2O+Na2O+K2O2, and 5TiO2≦10, and does not substantially contain B2O3, F, ZnO, SrO, BaO a
Disclosed is a glass composition which can be suitably used as a glass filler to be blended into a polycarbonate resin. This glass composition contains, in mass %, 50≦SiO2≦60, 8≦Al2O3≦15, 0≦MgO≦10, 10≦CaO≦30, 0≦Li2O+Na2O+K2O2, and 5TiO2≦10, and does not substantially contain B2O3, F, ZnO, SrO, BaO and ZrO2.
대표청구항▼
1. A glass composition comprising, expressed in percent by mass: 50≦SiO2≦60;8≦Al2O3≦15;1≦MgO≦10;10≦CaO≦30;0≦Li2O+Na2O+K2O<2; and5.31≦TiO2≦10;wherein the glass composition is substantially free from B2O3, F, ZnO, SrO, BaO, and ZrO2 and wherein the glass composition has a refractive index nd of 1.575
1. A glass composition comprising, expressed in percent by mass: 50≦SiO2≦60;8≦Al2O3≦15;1≦MgO≦10;10≦CaO≦30;0≦Li2O+Na2O+K2O<2; and5.31≦TiO2≦10;wherein the glass composition is substantially free from B2O3, F, ZnO, SrO, BaO, and ZrO2 and wherein the glass composition has a refractive index nd of 1.575 or greater and 1.595 or less. 2. The glass composition according to claim 1, wherein the glass composition has an Abbe number vd of 60 or less. 3. The glass composition according to claim 1, wherein the glass composition has a working temperature of 1300° C. or less. 4. The glass composition according to claim 1, wherein the glass composition has a temperature difference ΔT measured by subtracting the working temperature of the glass composition from the devitrification temperature. 5. A polycarbonate resin composition comprising: polycarbonate resin; anda glass filler;wherein the glass filler includes the glass composition according to claim 1; andthe glass filler is in the form of at least one selected from a glass flake, a chopped strand, a milled fiber, a glass particle, and a glass bead. 6. A glass filler for polycarbonate resin, prepared by once melting the glass composition according to claim 1 and then processing the glass composition to have a dimension in a predetermined range.
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