CN115432932A - Glass fiber composition with ultrahigh specific modulus and glass fiber - Google Patents
Glass fiber composition with ultrahigh specific modulus and glass fiber Download PDFInfo
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- CN115432932A CN115432932A CN202211235825.2A CN202211235825A CN115432932A CN 115432932 A CN115432932 A CN 115432932A CN 202211235825 A CN202211235825 A CN 202211235825A CN 115432932 A CN115432932 A CN 115432932A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- 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
- C03C13/00—Fibre or filament compositions
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
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Abstract
The invention belongs to the technical field of glass fibers, and particularly relates to a glass fiber composition with an ultrahigh specific modulus and a glass fiber. The weight percentage of each component is as follows: siO 2 2 :57.0‑61.0％、Al 2 O 3 :17.5‑22.9％、CaO:2.5‑5.9％、MgO:12.1‑16.0％、Fe 2 O 3 :0.2‑0.6％、TiO 2 :0.1‑1.5％、CeO 2 :0.1‑2.0％、La 2 O 3 :0‑1.0％、Li 2 O:0.05‑0.8％、K 2 O:0‑0.8％、Na 2 0 to 0.8 percent of O. The glass fiber compositions of the present invention have a glass density of less than 2.615g/cm 3 The tensile elastic modulus of the glass fiber reaches more than 93.5GPa, the specific modulus is more than 3.65, and the glass fiber composite material can be used for large-scale wind power blades and remarkably reduce the mass of the glass fiber composite material.
Description
Technical Field
The invention belongs to the technical field of glass fibers, and particularly relates to a glass fiber composition with an ultrahigh specific modulus and a glass fiber.
Background
Since the 90 s of the 20 th century, the wind power generation industry has rapidly developed due to the influence of energy crisis and environmental protection requirements, the load and weight of the wind blade are continuously increased, higher requirements are provided for large-size fan blades, and the wind blade has the development direction of future wind blades with light weight, high strength and low cost.
The specific modulus is the elastic modulus of unit density, the glass fiber with high specific modulus and the fabric thereof are widely applied to wind power blades, and the density is reduced to be lower while the glass fiber achieves high modulus. The large-size wind power blade made of the glass fiber with high specific modulus can effectively reduce the weight of the blade, can increase the power generation efficiency, can be suitable for low-wind-speed regions, is the development direction of the glass fiber industry, and becomes a hotspot of the research of the glass fiber industry in recent years.
The earliest manufacturers developing high modulus glass fibers were the Owensconning company in the United states, the most representative of which was S-2 glass, which contained approximately 65% SiO% 2 、25％Al 2 O 3 And 10% MgO, modulus of about 90-92GPa, melting temperature of 1650 deg.C, molding temperature of 1470 deg.C, and liquid phase temperature of 1465 deg.C. Because of the high melting temperature, the bushing can be melted only by an electric kiln which generally uses all platinum as a lining, the service life of the bushing is greatly shortened due to the high temperature, the production cost is high, and the absolute modulus is relatively low, so that the bushing is not beneficial to large-scale production.
Chinese patent CN111807707A discloses a high modulus glass fiber composition, glass fiber and composite material thereof, which contains 8-20% of Y 2 O 3 0-3% of SrO and 0-2.9% of La 2 O 3 . High content rare earth oxide Y 2 O 3 The introduction of the high-modulus glass fiber improves the raw material cost for producing the high-modulus glass fiber, and increases the density of the glass fiber. The glass fiber can achieve higher modulus, but is influenced by higher density, and the specific modulus is still lower.
In the prior art, the modulus of glass fiber is generally improved by introducing a large amount of rare earth oxide or by adding heavy elements to improve the density of the glass fiber, so that the glass fiber has high production cost and low specific modulus, and cannot be widely applied to wind power blades.
In the current high-modulus glass fiber products, the density of the products with the modulus of more than 93GPa is more than 2.62g/cm 3 And the specific modulus is less than 3.63, and the high-modulus formula has the problems of high crystallization rate and small operation window. In view of the above problems, it is urgently needed to develop a high specific modulus glass fiber with low density, high modulus and low crystallization tendency, which can greatly reduce the mass of the composite material and realize mass production while improving the mechanical properties of the composite material.
Disclosure of Invention
The invention aims to provide a glass fiber composition with ultrahigh specific modulus, and the glass fiber prepared from the glass fiber composition has the advantages of lower glass density, considerable elastic modulus, lower production cost, good forming temperature and liquidus temperature, low crystallization rate and suitability for tank furnace and large-scale production; the invention also provides the glass fiber with ultrahigh specific modulus.
The glass fiber composition with the ultrahigh specific modulus comprises the following components in percentage by mass:
SiO 2 :57.0-61.0％、Al 2 O 3 :17.5-22.9％、CaO:2.5-5.9％、MgO:12.1-16.0％、Fe 2 O 3 :0.2-0.6％、TiO 2 :0.1-1.5％、CeO 2 :0.1-2.0％、La 2 O 3 :0-1.0％、Li 2 O:0.05-0.8％、K 2 O:0-0.8％、Na 2 0 to 0.8 percent of O; wherein the mass percentage content of CaO and MgO meets CaO/MgO =0.15-0.45.
Further preferably:
CeO 2 with TiO 2 The mass percentage content of (A) satisfies CeO 2 /TiO 2 ≥1.1。
Li 2 O and CeO 2 The mass percentage content of (A) satisfies Li 2 O+CeO 2 ≤2.2％。
Al 2 O 3 The mass percentage content of the magnesium oxide and the MgO meets the requirement of Al 2 O 3 +MgO≥32.5％。
The glass fiber composition with the ultrahigh specific modulus does not contain BaO and SrO.
The density of the glass fiber composition with the ultrahigh specific modulus is less than or equal to 2.615g/cm 3 。
The tensile elastic modulus of the glass fiber prepared from the glass fiber composition with the ultrahigh specific modulus is more than or equal to 93.5GPa; the specific modulus of the glass fiber is more than 3.65; the forming temperature of the glass fiber is between 1280 and 1320 ℃; the liquidus temperature of the glass fiber is between 1225 and 1270 ℃.
The glass fiber composition with ultrahigh specific modulus is prepared from the following raw materials: calcined kaolin, quartz powder, magnesium oxide, quicklime, spodumene, cerium oxide and titanium dioxide.
The particle size of calcined kaolin is 50-100 μm, the particle size of quartz powder is 40-50 μm, the particle size of magnesium oxide is 50-100 μm, the particle size of quicklime is 100-200 μm, the particle size of spodumene is 70-150 μm, the particle size of cerium oxide is 40-100 μm, and the particle size of titanium dioxide is 40-100 μm.
The application of the glass fiber composition with ultrahigh specific modulus of the invention is as follows:
(1) Calculating the mass of each required raw material according to the content of each component in the glass fiber composition with the ultrahigh specific modulus, weighing and mixing to obtain a batch;
(2) Melting and clarifying the mixed batch at 1450-1550 ℃ to obtain homogeneous molten glass;
(3) Drawing the glass liquid at 1280-1320 ℃ to obtain the glass fiber.
The invention has the following beneficial effects:
SiO in the invention 2 Is a network forming body of glass, which is formed into an irregular continuous network structure by silicon-oxygen tetrahedron structure, and the structure has higher bond strength, can effectively improve the mechanical strength, chemical stability and thermal stability of the glass, and can reduce the density of the glass at the same time, but SiO 2 The increased content can raise the high temperature viscosity of the glass and increase the difficulty of fiber forming. On the basis of ensuring that the elastic modulus and the density meet the requirements, the invention can also meet the fiber forming requirements, and the invention limits the SiO in the glass composition 2 The mass percentage content is 57.0-61.0%.
Al 2 O 3 Is a network intermediate for forming glass, al 3+ Can capture non-bridge oxygen to form aluminum-oxygen tetrahedron to enter into silicon-oxygen network and reconnect broken network to make glass structure tend to be compact, which is favorable to raising mechanical performance and elastic modulus of glass, but introduces a great deal of Al 3+ Can promote the glass crystallization capacity, especially the mass percentage content of Al 2 O 3 When the content of the glass is more than 23 percent, a large amount of cordierite particles can be separated out from the glass, and in order to adjust the crystallization type in the glass and reduce the crystallization tendency of the cordierite, the invention limits Al 2 O 3 The mass percentage content range is 17.5-22.9%.
CaO is a network exo-oxide, has an effect of reducing high-temperature viscosity, and can shorten the glass material property. The introduction of CaO can increase the crystal phase competition, effectively inhibit the crystallization tendency of cordierite in glass, caO in the glass system of the invention can obviously increase the glass density, but the contribution to the elastic modulus of the glass is small, and the mass percentage content range of CaO is limited to 2.5-5.9%.
Mg 2+ With Ca 2+ In contrast, mg 2+ Small radius, high charge, strong polarization ability, strong accumulation effect, and can increase the polymerization degree of glass network and improve the elastic modulus of glass. Increasing MgO content and partial Mg 2+ With [ MgO ] 4 ]Tetrahedra exist and with [ SiO ] 4 ]The tetrahedron forms the framework of the glass structure, so that the density of the glass is reduced, the elastic modulus of the glass is obviously improved, but the excessive MgO can increase the crystallization upper limit temperature and the crystallization rate of the glass, and the SiO is reasonably controlled 2 、Al 2 O 3 On the premise of content, the invention limits the MgO mass percentage content to 12.1-16.0%, in order to further ensure the modulus and simultaneously control Al 2 O 3 The mass percentage content of the magnesium oxide and the MgO meets the requirement of Al 2 O 3 +MgO≥32.5％。
The influence of CaO and MgO on the elastic modulus, the density, the crystallization and the viscosity of the glass is comprehensively considered, the use ratio of CaO and MgO is adjusted, so that the glass achieves favorable performance indexes such as higher elastic modulus, lower density, lower crystallization temperature, crystallization rate and the like, the mass percentage content of CaO is limited to be 2.5-5.9%, and the mass percentage content of CaO and MgO is controlled to meet the condition that CaO/MgO =0.15-0.45. The invention does not add BaO and SrO, and the BaO and the SrO can obviously increase the density of the glass, which is not in accordance with the purpose of the invention.
The invention simultaneously adds CeO 2 And TiO 2 。TiO 2 Is an intermediate oxide, a portion of TiO in the formation of glass 2 With titanium oxide tetrahedron [ TiO ] 4 ]Into a network structure, and the other part is made of [ TiO ] 6 ]The octahedron is outside the structure. TiO 2 2 Is a nucleating agent which can increase the crystallization tendency of the glass when being added separately, and TiO is influenced by the reducing atmosphere of the batch during the melting process of the glass 2 Will be converted into Ti 2 O 3 The invention simultaneously adds CeO 2 ，Ti 3+ Will react with Ce 4+ React to generate a large amount of Ti 4+ By [ TiO ] 4 ]The titanium oxide tetrahedron forms enter the network structure, and the TiO outside the network structure is reduced 6 ]The quantity of titanium oxygen octahedrons strengthens the mutual connection of the structures, and can obviously improve the elastic modulus of the glass.
With TiO 2 And CeO 2 Increase of the content or use ratio of the two is not reasonable, tiO 2 Is not easy to form [ TiO 4 ]Or forming an excess of [ TiO ] 4 ]Excess of titanyl tetrahedron [ TiO ] 4 ]Can reduce silicon-oxygen tetrahedron [ SiO ] 4 ]The quantity gradually reduces the polymerization degree of the glass, influences the structural stability of the glass and reduces the elastic modulus of the glass. With TiO 2 And CeO 2 The increase in the content also aggravates the glass color. The present invention limits TiO 2 The mass percentage content of CeO is 0.1-1.5 percent 2 In the mass percentage content range of 0.1-2.0%, and CeO 2 /TiO 2 ≥1.1。
CeO 2 As a strong oxidant, ceO 2 The heating at high temperature can release oxygen to promote the discharge of bubbles in the molten glass in the glass melting process. CeO (CeO) 2 Can adjust the oxidation-reduction atmosphere in the kiln and effectively control FeO/Fe 2 O 3 The value of (1) improves the heat permeability of the molten glass, reduces the energy consumption in the glass melting process, is more favorable for stabilizing the temperature of a large-flow bushing and subsequent wire drawing operation by controlling FeO in the molten glass, and combines the wire drawing operation condition of a high-modulus kiln 2 O 3 The mass percentage of the components is 0.2-0.6%. CeO (CeO) 2 Can replace anhydrous sodium sulphate Na in the traditional formula 2 SO 4 And reduces SO in the melting process of the kiln 2 The generation of gas reduces the volatile gas SO 2 The corrosion to refractory materials also reduces SO in the flue gas discharged by the kiln 2 The content of (2) is more in line with the national double-carbon policy.
The invention limits Li 2 The mass percentage content range of O is 0.05-0.8%, and a proper amount of Li is added 2 O can lower the clarifying temperature, the forming temperature and the upper limit crystallization temperature of the glass, is beneficial to the fiber forming operation of the glass fiber, and Li + Small radius, electricityThe glass has high field strength, strong accumulation effect and compact network skeleton, and Li-O bonds can connect discontinuous network structures in a glass network system with Si-O broken bonds, so that the glass network structure is improved, and the elastic modulus of the glass is further enhanced. Li in the glass System of the invention 2 O、CeO 2 Supply more free oxygen, excess Li 2 O、CeO 2 Not only will interfere with [ AlO 4 ]、[TiO 4 ]And can weaken [ SiO ] 4 ]The intermediate oxygen destroys the structural compactness, causes a decrease in the elastic modulus of the glass, and promotes devitrification. The invention limits Li 2 O and CeO 2 The mass percentage content of (A) satisfies Li 2 O+CeO 2 ≤2.2％。
Na 2 O、K 2 O is not specifically introduced, but introduced from the mineral raw material used, and the addition amount of both does not exceed 0.8%. The invention can also add a proper amount of La 2 O 3 ，La 2 O 3 Can play a role in adjusting viscosity in the glass system, la 2 O 3 The viscosity can be suitably increased without affecting the crystallization rate, but the density of the glass is increased by too high a content, and the invention limits La 2 O 3 In mass percentage content range of<1.0％。
High content of Y 2 O 3 Can obviously improve the elastic modulus of the glass and inhibit crystallization when Y is 2 O 3 The content of less than 2.0% is not obvious in the aspects of modulus improvement and crystallization inhibition, and when the content is higher, the elastic modulus of the glass is improved, and the density is obviously increased, thus the method is not in accordance with the purpose of the invention. The invention can add up to 1.0% Y without affecting the comprehensive performance of the glass 2 O 3 Or is ZrO 2 、B 2 O 3 、P 2 O 5 。
In order to further reduce the production cost, the calcined kaolin raw material is selected for introducing the aluminum in the glass component, and the first value is to introduce Al instead of industrial alumina 2 O 3 The cost of glass per ton can be greatly reduced, and the calcined kaolin is mostly solid waste (commonly called coal gangue, low cost) of coal mineThe material is prepared by high-temperature calcination in a proper calciner; secondly, the calcined kaolin is calcined mainly to remove organic carbon, structural water and other impurity minerals in the coal-series kaolin and coal gangue so as to greatly reduce COD and loss on ignition, so that the calcined kaolin can replace industrial alumina and also can give consideration to the controllability of the COD and the gas rate of the batch; and thirdly, during the high-temperature calcination process of the coal-based kaolin, the mineral structure is rearranged to generate the calcined kaolin mainly containing the stable mullite phase, and compared with corundum, the coal-based kaolin has a lower melting point, is very beneficial to reducing the melting energy consumption of batch materials and saving the production cost of glass per ton.
In the glass fiber composition with ultrahigh specific modulus, baO and SrO components are not added, and CeO is added 2 And TiO 2 While increasing MgO content and optimizing SiO 2 、Al 2 O 3 CaO component, reasonably controlling CeO 2 /TiO 2 CaO/MgO ratio, and Li 2 O+CeO 2 Amount of (C) to use CeO 2 、TiO 2 、MgO、Li 2 O generates better synergistic effect, obviously improves the elastic modulus of the glass under the condition of reducing the density of the glass and ensures that SiO 2 -MgO-Al 2 O 3 The invention also discloses the application of the calcined kaolin raw material in a large tank furnace high-modulus formula, which is very beneficial to reducing the melting energy consumption of batch materials and saving the production cost of glass per ton.
The glass fiber composition of the present invention has a density of less than 2.615g/cm 3 The tensile modulus of the glass fiber reaches more than 93.5GPa, the specific modulus is more than 3.65, and the glass fiber composite material can be used for large-scale wind power blades and remarkably reduce the mass of the glass fiber composite material.
The glass fiber forming temperature of the invention is not higher than 1320 ℃, the liquidus temperature is not higher than 1270 ℃, the glass fiber forming temperature and the liquidus temperature are good, the crystallization rate is low, the requirements of a wire drawing process are met, and the glass fiber forming method is suitable for tank furnace and large-scale production.
Detailed Description
The present invention is further described below with reference to examples.
The invention relates to a tank furnace wire drawing production process of glass fiber with ultrahigh specific modulus, which comprises the following steps:
(1) Calculating the mass of various required raw materials according to the content of each component in the glass fiber composition with the ultrahigh specific modulus, weighing the raw materials, mixing the raw materials uniformly by air, conveying the mixture to a kiln head bin to obtain a batch mixture, and then putting the batch mixture into a large tank furnace at a constant speed by using a batch feeder;
(2) Melting the mixed batch in a tank furnace at 1450-1550 ℃ and clarifying to obtain homogeneous molten glass;
(3) Drawing glass liquid at 1280-1320 ℃ through a discharge spout on a large 4000-hole platinum rhodium bushing to form glass fiber;
(4) The glass fiber is drawn and wound to a drawing machine, and is drawn at high speed to form a precursor product.
The used raw materials comprise the following components and specifications:
| name of raw materials | Name and content of oxide | Particle size |
| Quartz powder | SiO 2 ≥99.0％ | 40-50μm |
| Calcined kaolin | Al 2 O 3 ≥40.0％、SiO 2 ≥53.0％ | 50-100μm |
| Magnesium oxide | MgO≥90％ | 50-100μm |
| Quick lime | CaO≥93％ | 100-200μm |
| Cerium oxide | CeO 2 ≥95％ | 40-100μm |
| Titanium white powder | TiO 2 ≥95％ | 40-100μm |
| Spodumene | Li 2 O≥5.0％、Al 2 O 3 ≥26％、SiO 2 ≥52.0％ | 70-150μm |
The raw materials with different grain size distributions are adopted, so that the uniformity of raw material mixing is ensured on the one hand; on the other hand, the introduction of the ultrafine powder is reduced, which is beneficial to discharging bubbles in the glass liquid. The invention is suitable for large tank furnaces and is beneficial to improving the production efficiency.
In verifying the overall performance of the glass fibers in the examples and comparative examples, the following parameters were chosen:
1) The forming temperature of the glass fiber, i.e., the temperature at which the viscosity of the glass is 1000Poise, can be characterized as the forming temperature of the fiber, and the high temperature viscosity of the glass is obtained using a high temperature viscometer.
2) The liquidus temperature of glass, i.e., the critical temperature at which the glass starts to crystallize, is generally the upper limit of the crystallization temperature of glass, and the crystallization upper limit temperature of glass is obtained by using a crystallization furnace.
3) Δ T, difference between forming temperature and liquidus temperature.
4) Crystallization melting enthalpy: the crystallization kinetics of the glass is researched by a differential thermal analysis method, a glass crystallization melting enthalpy parameter is obtained, the smaller the numerical value is, the weaker the crystallization capability of the glass is, the lower the crystallization rate is, and the crystallization capability of the glass can be comprehensively represented.
5) Glass density was tested according to the standard test method for determining glass density by ASTM C693 buoyancy method;
6) The modulus of elasticity is in accordance with ASTM D2343 standard;
7) The specific modulus is the ratio of the modulus of the material to the density (specific modulus = modulus/(density 9.8)).
Examples 1 to 16
The compositions of the glass fiber compositions having the ultra-high specific modulus and the glass fiber property data of examples 1 to 16 are shown in tables 1 and 2.
Comparative examples 1 to 7
The compositions of the glass fiber compositions and the glass fiber property data of comparative examples 1-7 are shown in Table 3.
TABLE 1 data Table for examples 1-8
TABLE 2 data Table for examples 9-16
TABLE 3 data sheet for comparative examples 1-7
Analyzing the data in tables 1-3, comparative example 1 is SiO, which is well known in the art 2 -MgO-Al 2 O 3 The ternary system high-modulus glass fiber component has low density and relatively low modulus, and cannot meet the requirement of the invention.
Comparative example 2 and example 15 show that when the lithium content is too large, li 2 O+CeO 2 When the viscosity is more than 2.2, the viscosity is obviously reduced, the crystallization is not reduced but is increased, and the elastic modulus is obviously reduced. As can be seen from comparative example 3 and example 1, when yttrium is used to replace cerium and titanium, the viscosity and the crystallization are simultaneously increased, the density is increased, and the modulus is obviously reduced; comparative example 4 increasing the amount of yttrium used, the modulus increased while the glass density reached 2.675g/cm 3 The density increase is obvious. Compared example 5 and comparative example 6 are added with cerium or titanium independently, compared example 7 is unreasonable in the ratio of cerium to titanium, the crystallization temperature is obviously increased, the crystallization capacity is enhanced, and the modulus is reduced.
In addition, siO was added to the mixture in example 2 2 The content is adjusted from 60.2% to 60.3%, the MgO content is adjusted from 14.4% to 14.3%, and the content of the rest components is unchanged. The modulus is 93.2GPa and the density is 2.610/cm through detection 3 . The experiment shows that when Al is present 2 O 3 + MgO content not in Al 2 O 3 When + MgO is not less than 32.5%, the modulus is greatly affected.
Claims (9)
1. A glass fiber composition having an ultra-high specific modulus characterized by: the weight percentage of each component is as follows:
SiO 2 :57.0-61.0％、Al 2 O 3 :17.5-22.9％、CaO:2.5-5.9％、MgO:12.1-16.0％、Fe 2 O 3 :0.2-0.6％、TiO 2 :0.1-1.5％、CeO 2 :0.1-2.0％、La 2 O 3 :0-1.0％、Li 2 O:0.05-0.8％、K 2 O:0-0.8％、Na 2 O:0-0.8％；wherein, the mass percentage content of CaO and MgO meets CaO/MgO =0.15-0.45.
2. The glass fiber composition with ultra-high specific modulus according to claim 1, characterized in that: ceO (CeO) 2 With TiO 2 The mass percentage content of (A) satisfies CeO 2 /TiO 2 ≥1.1。
3. The glass fiber composition with ultra-high specific modulus according to claim 1, characterized in that: li 2 O and CeO 2 The mass percentage content of (A) satisfies Li 2 O+CeO 2 ≤2.2％。
4. The glass fiber composition with ultra-high specific modulus according to claim 1, characterized in that: al (Al) 2 O 3 The mass percentage content of the magnesium oxide and the MgO meets the requirement of Al 2 O 3 +MgO≥32.5％。
5. The glass fiber composition with ultra-high specific modulus according to any one of claims 1 to 4, wherein: the density of the glass fiber composition with the ultrahigh specific modulus is less than or equal to 2.615g/cm 3 。
6. A glass fiber made from the glass fiber composition with ultra-high specific modulus as claimed in any one of claims 1 to 5, wherein: the specific modulus of the glass fiber is more than 3.65.
7. The glass fiber made of the glass fiber composition with ultra-high specific modulus according to claim 6, wherein: the tensile elastic modulus of the glass fiber is more than or equal to 93.5GPa.
8. Glass fiber made of a glass composition with ultra-high specific modulus according to claim 6, characterized in that: the glass fiber has a forming temperature of 1280-1320 ℃.
9. Glass fiber made of a glass composition with ultra-high specific modulus according to claim 6, characterized in that: the liquidus temperature of the glass fiber is between 1225 and 1270 ℃.
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|---|---|---|---|---|
| CN116332521A (en) * | 2023-03-29 | 2023-06-27 | 巨石集团有限公司 | Low-density high-performance glass fiber composition, glass fiber and composite material thereof |
| CN116332521B (en) * | 2023-03-29 | 2024-06-18 | 巨石集团有限公司 | Low-density high-performance glass fiber composition, glass fiber and composite material thereof |
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| CN115432932B (en) | 2023-07-21 |
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