High-modulus glass fiber composition based on basalt

Abstract

A high-modulus glass fiber composition based on basalt includes components with contents in mass percentage satisfying SiO.sub.2: 53.0%-60.0%; Al.sub.2O.sub.3: 24.5%-28.0 %; MgO: 8%-15.0%; Fe.sub.2O.sub.3: 1.5%-5.5%; TiO.sub.2: 2.0%-4.0%; 0<CaO≤5.0%; and 0<Na.sub.2O+K.sub.2O≤2.0%.

Claims

1. A high-modulus glass fiber composition based on basalt, comprising components with contents in mass percentage satisfying following: SiO.sub.2: 53.0%-60.0%; Al.sub.2O.sub.3: 24.5%-28.0%; MgO: 8.0%-15.0%; Fe.sub.2O.sub.3: 1.5%-5.5%; TiO.sub.2: 2.0%-4.0%; 0<CaO≤5.0%; and 0<Na.sub.2O+K.sub.2O≤2.0%.

2. The high-modulus glass fiber composition based on basalt according to claim 1, wherein 0<Na.sub.2O≤1.5%.

3. The high-modulus glass fiber composition based on basalt according to claim 1, wherein mass percentages of MgO and Al.sub.2O.sub.3 satisfy MgO+Al.sub.2O.sub.3≥33%.

4. The high-modulus glass fiber composition based on basalt according to claim 1, wherein mass percentages of MgO and Al.sub.2O.sub.3 satisfy 0.35≤MgO/Al.sub.2O.sub.3≤0.5.

5. The high-modulus glass fiber composition based on basalt according to claim 1, wherein mass percentages of SiO.sub.2 and Al.sub.2O.sub.3 satisfy 2.1≤SiO.sub.2/Al.sub.2O.sub.3≤3.5.

6. The high-modulus glass fiber composition based on basalt according to claim 1, wherein mass percentages of FeO and Fe.sub.2O.sub.3 satisfy 0.4≤FeO/Fe.sub.2O.sub.3≤0.5.

7. The high-modulus glass fiber composition based on basalt according to claim 1, wherein a modulus of the high-modulus glass fiber composition based on basalt is 93 to 95 GPa.

8. A glass fiber made from the glass fiber composition according to claim 1.

9. The high-modulus glass fiber composition based on basalt according to claim 1, wherein the contents of the components in mass percentage satisfy: SiO.sub.2: 53.0%-60.0%; Al.sub.2O.sub.3: 24.5%-28.0%; MgO: 8.0%-15.0%; Fe.sub.2O.sub.3: 1.5%-5.5%; TiO.sub.2: 2.0%-4.0%; 0<CaO≤5.0%; 0<Na.sub.2O≤1.5%; and 0<K.sub.2O≤0.5%.

10. The high-modulus glass fiber composition based on basalt according to claim 9, wherein the contents of the components in mass percentage satisfy: SiO.sub.2: 53.0%-60.0%; Al.sub.2O.sub.3: 24.5%-28.0%; MgO: 8.0%-15.0%; Fe.sub.2O.sub.3: 1.5%-5.5%; TiO.sub.2: 2.0%-4.0%; 0<CaO≤5.0%; 0<Na.sub.2O≤1.5%; 0<K.sub.2O≤0.5%; and FeO/Fe.sub.2O.sub.3≤0.6.

11. The high-modulus glass fiber composition based on basalt according to claim 10, wherein the contents of the components in mass percentage satisfy: SiO.sub.2: 53.0%-58.0%; Al.sub.2O.sub.3: 24.5%-27.0%; MgO: 8.0%-12.0%; Fe.sub.2O.sub.3: 1.5%-5.5%; TiO.sub.2: 2.0%-4.0%; CaO: 3.0%-5.0%; 0<Na.sub.2O≤1.5%; 0<K.sub.2O≤0.5%; and FeO/Fe.sub.2O.sub.3≤0.6.

Description

DETAILED DESCRIPTION OF THE PRESENT INVENTION

(1) The present disclosure will be further described below by embodiments.

Embodiments 1-8

(2) In Embodiments 1-8, the components of the high-modulus glass fiber composition based on basalt are shown in Table 1.

(3) In accordance with the contents of the components, different raw materials are prepared and mixed; the mixed raw materials are melted and clarified in a furnace at 1550±50° C. to obtain the high-modulus glass fiber composition based on basalt; and, various indexes such as the fiber forming temperature, crystallization upper temperature, ΔT, glass Young's modulus and the number of bubbles of the glass fiber composition after annealing are detected, and the data is shown in Table 1.

Comparison Examples 1-2

(4) In the comparison examples 1-2, the components of the glass fiber composition are shown in Table 1.

(5) The data of various indexes such as the fiber forming temperature, crystallization upper temperature, ΔT, glass Young's modulus and the number of bubbles of the glass fiber composition is shown in Table 1.

(6) TABLE-US-00001 TABLE 1 Embodi- Embodi- Embodi- Embodi- Embodi- Embodi- Embodi- Embodi- Comparison Comparison Component ment 1 ment 2 ment 3 ment 4 ment 5 ment 6 ment 7 ment 8 example 1 example 2 SiO.sub.2 55.9 55 54.2 54.2 56.5 54 53.5 54.2 59.4 60 Al.sub.2O.sub.3 25 25 25 24.6 24.8 25.2 24.8 25.3 18 21 CaO 4.2 4 4.9 1.8 3 2 1.3 3.5 11 2 MgO 9 9.8 9 12 9.2 12 11.5 9 10 12 Fe.sub.2O3 1.6 2.2 2.5 3 3.5 4 4.5 5.4 0.15 1 Na.sub.2O 1.1 1.2 1.3 1.5 0.7 0.5 0.6 0.5 0.48 0.3 K.sub.2O 0.2 0.3 0.3 0.5 0.3 0.3 0.2 0.1 0.27 0.2 ZrO.sub.2 / / / / / / / / 0.7 / TiO.sub.2 3 2.5 2.8 2.4 2 2 3.6 2 / / B.sub.2O.sub.3 / / / / / / / / / 3.5 FeO/ 0.42 0.46 0.43 0.44 0.45 0.48 0.49 0.48 / / Fe.sub.2O.sub.3 Fiber 1334 1325 1315 1320 1330 1325 1333 1335 1300 1380 forming temperature, ° C. Crystallization 1290 1285 1278 1280 1275 1295 1295 1280 1250 1410 upper temperature, ° C. ΔT, ° C. 44 40 37 40 55 30 38 55 50 −30 Glass 93.5 93.6 94.2 94.5 93.2 95.0 94.3 93.5 88 92 Young's modulus, Gpa Number of Not Not Not Not Not Not Not Not 6 13 Bubbles, detected detected detected detected detected detected detected detected bubbles/ ounce

(7) In Table 1, the comparison example 1 shows the related data of the H glass, and the comparison example 2 shows the related data of the S glass. It can be known from the data in Table 1 that the modulus of the glass is improved by increasing the content of Al.sub.2O.sub.3 and MgO, and the crystallization upper temperatures in Embodiments 1-8 and the comparison examples 1-2 are all relatively high, which is difficult to avoid. In the comparison example 1, ZrO.sub.2 is added, and the fiber forming temperature and the crystallization upper temperature are close to the data in Embodiments 1-8; but the Young's modulus is far lower than that in Embodiments 1-8. In the comparison example 2, B.sub.2O.sub.3 is added, but the crystallization upper temperature is relatively high, and a series of problems such as crystallization will be caused in the actual production process and it is very difficult to realize scale production.

(8) In the present disclosure, by adding TiO.sub.2 and increasing the content of Fe.sub.2O.sub.3, the Young's modulus of the glass is improved, the fiber forming temperature and the crystallization upper temperature of the glass are reduced, and the forming temperature of the glass is also reduced, so that a large space is provided to the increase of the content of Al.sub.2O.sub.3. However, with the increase of the contents of TiO.sub.2 and Fe.sub.2O.sub.3, the density of the glass also increases continuously, and the brittleness of the glass also increases, it is disadvantageous for the increase of modulus. Therefore, in the present disclosure, the content of TiO.sub.2 is controlled to be 2.0% to 4.0%, and the content of Fe.sub.2O.sub.3 is controlled to be 1.5% to 5.5%. In this case, the glass has the highest modulus which is 93 to 95 GPa.

(9) In the present disclosure, the value of FeO/Fe.sub.2O.sub.3 is also controlled below 0.6. Since the COD of the basalt raw material is relatively high, causing that the content of carbon in the raw material is relatively high, and it needs to be balanced and adjusted by an oxidizing substance such as TiO.sub.2, otherwise, uneven and stripes visible to naked eyes will occur in the glass, and the modulus stability will be influenced.

(10) A glass fiber with excellent performances may be made from the glass fiber composition according to the present disclosure.

INDUSTRIAL APPLICABILITY

(11) In the high-modulus glass fiber composition based on basalt provided by the present disclosure, by introducing a proper content of components Fe.sub.2O.sub.3 and TiO.sub.2 and by controlling the ratio of ferrous oxide to ferric oxide, the thermal expansion coefficient of the glass is reduced, the density of the glass is improved, and the Young's modulus of the glass fiber is also significantly improved. Moreover, the number of bubbles, the forming temperature and the crystallization upper temperature of the glass can be reduced. Compared with the existing high-modulus glass, the glass fiber composition in the present disclosure has breakthrough process in crystallization temperature and elastic modulus. The crystallization temperature of the glass is reduced, the number of bubbles is small and the elastic modulus is high and stable. The basalt glass fiber has the advantage of high-efficiency industrial production of the glass fiber.