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US 2025/0034032 A1Published application
Glass fiber, glass fiber manufacturing method, and glass
AssigneeNippon Electric Glass Co., Ltd.
InventorsKyohei SEGAWA, Yuki YOKOTA
Life of this patent
Estimating the term…
Abstract
To provide a glass fiber having a low spinning temperature and a low liquidus temperature, a large difference between the liquidus temperature and the spinning temperature, and excellent alkali resistance, and a manufacturing method therefor. A glass fiber contains, as a glass composition, in mass % in terms of oxide, from 50% to 70% of SiO2, from 10% to 20% of Na2O, from 0% to 5.5% of TiO2, and from 10% to 30% of ZrO2.
Claims16
1:
- A glass fiber comprising, as a glass composition, in mass % in terms of oxide, from 50% to 70% of SiO2, from 10% to 20% of Na2O, from 0% to 5.5% of TiO2, and from 10% to 30% of ZrO2.
2:
- The glass fiber according to claim 1, further comprising, as a glass composition, in mass % in terms of oxide, from 0.001% to 0.1% of Y2O3.
3:
- The glass fiber according to claim 1, further comprising, as a glass composition, in mass % in terms of oxide, from 0.001% to 1% of HfO2.
4:
- The glass fiber according to claim 1, comprising, as a glass composition, in mass % in terms of oxide, from 57.1% to 64.8% of SiO2, from 0% to 0.3% of Al2O3, from 1.71% to 10% of CaO, from 12% to 20% of Na2O, from 0% to 6% of K2O, from 0% to 5% of TiO2, and from 15.1% to 18.5% of ZrO2.
5:
- The glass fiber according to claim 1, wherein as a glass composition, Y2O3/ZrO2 is 0.0005 or more in mass ratio in terms of oxide.
6:
- The glass fiber according to claim 1, wherein as a glass composition, Na2O/ZrO2 is from 0.4 to 1.3 in mass ratio in terms of oxide.
7:
- The glass fiber according to claim 1, wherein as a glass composition, K2O/CaO is 15 or less in mass ratio in terms of oxide.
8:
- The glass fiber according to claim 1, wherein as a glass composition, K2O/ZrO2 is 0.5 or less in mass ratio in terms of oxide.
9:
- The glass fiber according to claim 1, wherein as a glass composition, (Na2O+K2O)/(CaO+MgO) is 1.5 or more in mass ratio in terms of oxide.
10:
- The glass fiber according to claim 1, wherein as a glass composition, (Na2O+K2O+CaO)/Al2O3 is 80 or more in mass ratio in terms of oxide.
11:
- The glass fiber according to claim 1, wherein a spinning temperature Tx is 1350° C. or lower.
12:
- The glass fiber according to claim 1, wherein a temperature difference ΔTxy between a spinning temperature Tx and a liquidus temperature Ty is 15° C. or more.
13:
- The glass fiber according to claim 1, wherein a liquidus temperature Ty is 1250° C. or lower.
14:
- The glass fiber according to claim 1, wherein when a glass corresponding to a specific gravity crushed and classified to a particle size of from 300 μm to 500 μm is immersed in 100 ml of a 10 mass % NaOH aqueous solution at 80° C. for 168 hours, a mass loss rate of the glass is less than 4.5%.
15:
- A glass fiber manufacturing method comprising:
- melting a mixed raw material batch in a glass melting furnace, continuously drawing the obtained molten glass out of a bushing, and forming the drawn-out glass into a fiber shape, to obtain the glass fiber according to claim 1.
16:
- A glass comprising, as a glass composition, in mass % in terms of oxide, from 50% to 70% of SiO2, from 10% to 20% of Na2O, from 0% to 5.5% of TiO2, and from 10% to 30% of ZrO2.