# US 2019/0169066 A1 · High-modulus glass fiber composition, glass fiber and composite material therefrom

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- Number: US 2019/0169066 A1
- Document ID: US20190169066A1
- Status: Published application
- Kind: A1
- Application number: 16/269,379
- Filed: 2019-02-06
- Published: 2019-06-06
- Earliest claimed: 2016-02-29
- Assignees: Jushi Group Co., Ltd.
- Applicants: Jushi Group Co., Ltd.
- Inventors: Yuqiang ZHANG; Guorong CAO; Lin ZHANG; Wenzhong XING
- Web page: https://patentgrep.com/patent/US20190169066A1

## CPC

- C03C 13/00: Fibre or filament compositions (manufacture of fibres or filaments C03B37/00)
- C03C 3/095: containing rare earths
- C03C 2213/00: Glass fibres or filaments
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS

## Abstract

The present invention provides a high-modulus glass fiber composition, a glass fiber and a composite material therefrom. The glass fiber composition comprises the following components expressed as percentage by weight: 55-64% SiO2, 13-24% Al2O3, 0.1-6% Y2O3, 3.4-10.9% CaO, 8-14% MgO, lower than 22% CaO+MgO+SrO, lower than 2% Li2O+Na2O+K2O, lower than 2% TiO2, lower than 1.5% Fe2O3, 0-1.2% La2O3, wherein the range of the weight percentage ratio C1=(Li2O+Na2O+K2O)/(Y2O3+La2O3) is greater than 0.26. Said composition can significantly increase the glass elastic modulus, effectively inhibit the crystallization tendency of glass, decrease the liquidus temperature, secure a desirable temperature range (ΔT) for fiber formation and enhance the fining of molten glass, thus making it particularly suitable for production of high-modulus glass fiber with refractory-lined furnaces.

## Claims

### Claim 1

A high-modulus glass fiber composition, comprising the following components expressed as percentage by weight:
SiO2
55-64%
Al2O3
16.7-24%
Y2O3
0.1-2.4%
CaO
3.4-10.9%
MgO
9.4-14%
CaO + MgO + SrO
<22%
Li2O + Na2O + K2O
<2%
TiO2
<2%
Fe2O3
<1.5%
La2O3
0-1.2%
wherein, the range of the weight percentage ratio C1=(Li2O+Na2O+K2O)/(Y2O3+La2O3) is greater than 0.26.

### Claim 2 (depends on 1)

The high-modulus glass fiber composition according to claim 1, wherein the range of the weight percentage ratio C2=MgO/(CaO+SrO) is 0.8-2.1.

### Claim 3 (depends on 1)

The high-modulus glass fiber composition according to claim 1, comprising the following components expressed as percentage by weight:
SiO2
56-60.4%
Al2O3
16.7-24%
Y2O3
0.1-2.4%
CaO
3.4-10.9%
MgO
9.4-14%
CaO + MgO + SrO
<22%
SrO
<3%
Li2O + Na2O + K2O
<2%
TiO2
<2%
Fe2O3
<1.5%
La2O3
0-1.2%
wherein, the range of the weight percentage ratio C1=(Li2O+Na2O+K2O)/(Y2O3+La2O3) is greater than 0.26.

### Claim 4 (depends on 1)

The high-modulus glass fiber composition according to claim 1, wherein the content range of Li2O by weight is 0.1-1.5%.

### Claim 5 (depends on 1)

The high-modulus glass fiber composition according to claim 1, wherein the content range of SrO by weight is 0.1-2.5%.

### Claim 6 (depends on 1)

The high-modulus glass fiber composition according to claim 1, wherein the content range of CaO by weight is 6-10.3%.

### Claim 7 (depends on 1)

The high-modulus glass fiber composition according to claim 1, wherein the content range of MgO by weight is 9.4-13%.

### Claim 8 (depends on 2)

The high-modulus glass fiber composition according to claim 2, wherein the content range of Y2O3 by weight is 0.5-2.4%.

### Claim 9 (depends on 2)

The high-modulus glass fiber composition according to claim 2, wherein the content range of Y2O3 by weight is 1.5-2.4%.

### Claim 10 (depends on 1)

The high-modulus glass fiber composition according to claim 1, comprising the following components expressed as percentage by weight:
SiO2
56-60.4%
Al2O3
16.7-24%
Y2O3
0.5-2.4%
CaO
3.4-10.9%
MgO
9.4-14%
CaO + MgO + SrO
<22%
SrO
<3%
Li2O
0.1-1.5%
Li2O + Na2O + K2O
<2%
TiO2
<2%
Fe2O3
<1.5%
La2O3
0-1.2%
wherein, the range of the weight percentage ratio C1=(Li2O+Na2O+K2O)/(Y2O3+La2O3) is greater than 0.26, and the weight percentage ratio C2=MgO/(CaO+SrO) is 0.8-2.1.

### Claim 11 (depends on 1)

The high-modulus glass fiber composition according to claim 1, comprising the following components expressed as percentage by weight:
SiO2
56-60.4%
Al2O3
16.7-24%
Y2O3
0.5-2.4%
CaO
3.4-10.9%
MgO
9.4-14%
CaO + MgO + SrO
<22%
SrO
<3%
Li2O
0.1-1.5%
Li2O + Na2O + K2O
<2%
TiO2
<2%
Fe2O3
<1.5%
La2O3
0-1.2%
wherein, the range of the weight percentage ratio C1=(Li2O+Na2O+K2O)/(Y2O3+La2O3) is greater than 0.28, and the weight percentage ratio C2=MgO/(CaO+SrO) is 0.8-2.1.

### Claim 12 (depends on 1)

The high-modulus glass fiber composition according to claim 1, comprising the following components expressed as percentage by weight:
SiO2
57-60.4%
Al2O3
16.7-24%
Y2O3
0.5-2.4%
CaO
5-10.6%
MgO
9.4-14%
CaO + MgO + SrO
<21%
SrO
<3%
Li2O
0.1-1%
Li2O + Na2O + K2O
<2%
TiO2
<2%
Fe2O3
<1.5%
La2O3
0-1.2%
wherein, the range of the weight percentage ratio C1=(Li2O+Na2O+K2O)/(Y2O3+La2O3) is greater than 0.28, and the weight percentage ratio C2=MgO/(CaO+SrO) is 0.8-2.1.

### Claim 13 (depends on 1)

The high-modulus glass fiber composition according to claim 1, comprising the following components expressed as percentage by weight:
SiO2
57-60.4%
Al2O3
16.7-23%
Y2O3
1.5-2.4%
CaO
6-10.3%
MgO
9.4-13%
CaO + MgO + SrO
<21%
SrO
<3%
Li2O
0.1-1%
Li2O + Na2O + K2O
<2%
TiO2
<2%
Fe2O3
<1.5%
La2O3
0-1.2%
wherein, the range of the weight percentage ratio C1=(Li2O+Na2O+K2O)/(Y2O3+La2O3) is greater than 0.29, and the weight percentage ratio C2=MgO/(CaO+SrO) is 0.9-1.8.

### Claim 14 (depends on 1)

The high-modulus glass fiber composition according to claim 1, comprising the following components expressed as percentage by weight:
SiO2
57-60.4%
Al2O3
16.7-23%
Y2O3
1.5-2.4%
CaO
6-10.3%
MgO
9.4-13%
CaO + MgO + SrO
<21%
SrO
<3%
Li2O
0.1-1%
Li2O + Na2O + K2O
<2%
TiO2
<2%
Fe2O3
<1.5%
La2O3
0-1.2%
wherein, the range of the weight percentage ratio C1=(Li2O+Na2O+K2O)/(Y2O3+La2O3) is greater than 0.29, and the weight percentage ratio C2=MgO/(CaO+SrO) is 0.9-1.7.

### Claim 15 (depends on 1)

The high-modulus glass fiber composition according to claim 1, wherein the content range of La2O3 by weight is 0.1-1%.

### Claim 16 (depends on 1)

The high-modulus glass fiber composition according to claim 1, comprising the following components expressed as percentage by weight:
SiO2
55-64%
Al2O3
greater than 19% and not greater than 21%
Y2O3
0.1-2.4%
CaO
3.4-10.9%
MgO
9.4-10.5%
CaO + MgO + SrO
<22%
Li2O + Na2O + K2O
≤1%
TiO2
<2%
Fe2O3
<1.5%
La2O3
0-1.2%
wherein, the range of the weight percentage ratio C1=(Li2O+Na2O+K2O)/(Y2O3+La2O3) is greater than 0.26.

### Claim 17 (depends on 1)

The high-modulus glass fiber composition according to claim 1, comprising CeO2 with the weight percentage of 0-1%.

### Claim 18 (depends on 1)

A glass fiber, characterized by, being produced from the glass fiber compositions according to claim 1.

### Claim 19 (depends on 18)

The glass fiber according to claim 18, characterized by, having the range of the elastic modulus 90-103 GPa.

### Claim 20 (depends on 18)

A composite material, characterized by, incorporating the glass fiber according to claim 18.