Glass fiber
There is provided a glass fiber comprising the SiO 2 content is 57.0 to 63.0% by weight; the Al 2 O 3 content is 19.0 to 23.0% by weight; the MgO content is 10.0 to 15.0% by weight; the CaO content is 4.0 to 11.0% by weight; and the total content of SiO 2 , Al 2 O 3 , MgO and CaO is 99.5% by weight or higher based on the total weight.
1. A glass fiber, comprising:
a SiO 2 content of 57.0 to 63.0% by weight;
a Al 2 O 3 content of 19.0 to 23.0% by weight;
a MgO content of 10.0 to 15.0% by weight; and
a CaO content of 5.5 to 11.0% by weight, and
a total content of SiO 2 , Al 2 O 3 , MgO and CaO of 99.5% by weight or higher based on a total weight thereof,
a weight ratio of the SiO 2 content/the Al 2 O 3 content of 2.7 to 3.2, and
a weight ratio of the MgO content/the CaO content of 0.8 to 2.0,
wherein
wherein the SiO 2 content/(the SiO 2 content+the MgO content+the CaO content)×100 is 71.0 or more and 81.0 or less, a devitrification primary phase of the glass is a cordierite crystal or a mixed crystal of cordierite and anorthite, and the glass fiber has an elastic modulus of 95 GPa or higher.
2. The glass fiber according to claim 1 , comprising:
a total content of the SiO 2 content and the Al 2 O 3 content of 77.0 to 85.0% by weight.
3. The glass fiber according to claim 1 , comprising:
a total content of the MgO content and the CaO content of 16.0% by weight or higher.
4. The glass fiber according to claim 1 , comprising:
a SiO 2 content of 57.0 to 62.0% by weight.
5. The glass fiber according to claim 4 , comprising:
a weight ratio of the SiO 2 content/the Al 2 O 3 content of 2.7 to 3.1.
6. The glass fiber according to claim 5 , comprising:
a total content of the SiO 2 content and the Al 2 O 3 content of 77.0 to 85.0% by weight.
7. The glass fiber according to claim 5 , comprising:
a total content of the MgO content and the CaO content of 16.0% by weight or higher.
8. The glass fiber according to claim 5 , further comprising a Fe 2 O 3 and an alkali metal oxide, and
a total content of the Fe 2 O 3 content and the alkali metal oxide content of 0.4% by weight or less.
9. The glass fiber according to claim 4 , comprising:
a total content of the SiO 2 content and the Al 2 O 3 content of 77.0 to 85.0% by weight.
10. The glass fiber according to claim 9 , comprising:
a total content of the MgO content and the CaO content of 16.0% by weight or higher.
11. The glass fiber according to claim 9 , further comprising a Fe 2 O 3 and an alkali metal oxide, and
a total content of the Fe 2 O 3 content and the alkali metal oxide content of 0.4% by weight or less.
12. The glass fiber according to claim 4 , comprising:
a total content of the MgO content and the CaO content of 16.0% by weight or higher.
13. The glass fiber according to claim 12 , further comprising a Fe 2 O 3 and an alkali metal oxide, and
a total content of the Fe 2 O 3 content and the alkali metal oxide content of 0.4% by weight or less.
14. The glass fiber according to claim 4 , further comprising a Fe 2 O 3 and an alkali metal oxide, and
a total content of the Fe 2 O 3 content and the alkali metal oxide content of 0.4% by weight or less.
15. The glass fiber according to claim 1 , comprising:
a weight ratio of the SiO 2 content/the Al 2 O 3 content of 2.7 to 3.1.
16. The glass fiber according to claim 1 , further comprising a Fe 2 O 3 and an alkali metal oxide, and
a total content of the Fe 2 O 3 content and the alkali metal oxide content of 0.4% by weight or less.
17. The glass fiber according to claim 1 , further comprising a Fe 2 O 3 and an alkali metal oxide, and the glass fiber comprises
a SiO 2 content of 57.0 to 60.2% by weight;
a weight ratio of the SiO 2 content/the Al 2 O 3 content of 2.7 to 3.1;
a weight ratio of the MgO content/the CaO content of 1.0 to 1.8; and
a total content of the Fe 2 O 3 content and the alkali metal oxide content of 0.01% by weight or more and 0.4% by weight or less.
18. The glass fiber according to claim 17 , comprising
a Al 2 O 3 content of 20.1 to 23.0% by weight.
19. The glass fiber according to claim 1 , wherein the total content of SiO 2 , Al 2 O 3 , MgO and CaO is 99.7% by weight or higher based on a total weight thereof.
20. The glass fiber according to claim 1 , wherein the total content of SiO 2 , Al 2 O 3 , MgO and CaO is 99.8% by weight or higher based on a total weight thereof.
21. The glass fiber according to claim 1 , wherein the MgO content/(the SiO 2 content+the MgO content+the CaO content)×100 is 11.9 or more and 19.4 or less.
22. The glass fiber according to claim 1 , wherein the CaO content/(the SiO 2 content+the MgO content+the CaO content)×100 is 6.59 or more and 14.0 or less.
23. The glass fiber according to claim 1 , wherein the glass fiber has an elastic modulus of 96 GPa or higher.
24. The glass fiber according to claim 1 , wherein the glass fiber has an elastic modulus from 97 GPa to 98 GPa.