A color-changing glass fiber composition, a preparation method thereof, and glass fiber

Abstract

A color-changing glass fiber composition, a preparation method thereof, and glass fiber proposed by the present invention, by mass percentage, include 63% - 74% of SiO2, 2% - 7% of Al2O3, 0.23% - 1.4% of Fe2O3, 2% - 7% of CaO, 2% - 6% of MgO, 0.1% - 0.5% of K2O, 10% - 17% of Na2O, 0.6% - 6% of rare earth oxides, 0 - 0.5% of W, 0 - 0.5% of Pt, and 0 - 0.1% of TiO2; wherein, the mass percentage content of rare earth oxides and CaO + MgO satisfies rare earth oxides / (CaO + MgO) = 0.1 - 1.1; the mass percentage content of rare earth oxides and W and Pt satisfies rare earth oxides / (W and Pt) > 2; the mass percentage of SiO2 and Al2O3 satisfies SiO2 and Al2O3 ≥ 68%. The color-changing glass fiber composition, a preparation method thereof, and glass fiber provided by the present invention apply the idea of color-changing glass to glass fiber, enabling the glass fiber to change its own color according to different illuminations.

Description

Technical Field

[0001] The present invention belongs to glass fiber compositions, and particularly relates to a color-changing glass fiber composition, a preparation method thereof, and glass fibers. Background Art

[0002] Glass fiber is an inorganic non-metallic material with excellent properties. There are many types of glass fiber. Its advantages are good insulation, high heat resistance, good corrosion resistance, and high mechanical strength. However, its disadvantages are brittleness and poor wear resistance. The diameter of its single filament is several micrometers to twenty-odd micrometers, which is 1 / 20 - 1 / 5 of the diameter of a hair. Each bundle of fiber rovings consists of hundreds or even thousands of single filaments. Glass fiber is usually used as a reinforcing material, an electrical insulation material, a heat insulation and heat preservation material, a circuit board, etc. in various fields of the national economy.

[0003] Color-changing glass refers to glass that changes color under certain conditions such as light, temperature, electric field or current, surface pressure, etc., and changes accordingly with the change of conditions, and can reversibly automatically return to the initial state when the applied conditions disappear. It is also called dimming glass.

[0004] China is a major glass fiber producer. In the current domestic and foreign glass fiber markets, high-strength glass fiber occupies a large proportion. However, since high-strength glass fiber is mostly light-colored and has poor dyeability, its application range is greatly limited. Sometimes, for aesthetic needs, the glass fiber shows different color-changing properties under different light intensities.

[0005] Therefore, how to apply the idea of color-changing glass to glass fiber so that the glass fiber can change its own color according to different light intensities has become the key technical problem to be solved in this solution. In the prior art, although rare earth elements can change the color of glass, the color is relatively single, mostly the change of light and dark, and it is difficult to have the switching of different colors. Summary of the Invention

[0006] The purpose of the present invention is to provide a color-changing glass fiber composition, a preparation method thereof, and glass fibers, which solve the technical problem of how to apply the idea of color-changing glass to glass fiber, so that the glass fiber can change its own color according to different light intensities, not only realizing the change of light and dark of the color, but also having the switching of different colors, with very remarkable effects, and solving the problem that glass fibers in the prior art must be "dyed".

[0007] A color-changing glass fiber composition is as follows by mass percentage:

[0008] SiO2 63% - 74%

[0009] Al2O3 2% - 7%

[0010] Fe2O3 0.23% - 1.4%

[0011] CaO 3% - 7%

[0012] MgO 2% - 6%

[0013] K2O 0.1% - 0.5%

[0014] Na2O 10% - 17%

[0015] Rare earth oxides 0.1% - 6%

[0016] W 0 - 0.5%

[0017] Pt 0 - 0.5%

[0018] TiO2 0 - 0.1%;

[0019] Among them, the mass percentage content of rare earth oxides and CaO + MgO satisfies rare earth oxides / (CaO + MgO) = 0.1 - 1.1;

[0020] The mass percentage content of rare earth oxides and W and Pt satisfies rare earth oxides / (W + Pt) > 2; The mass percentage of SiO2 and Al2O3 satisfies SiO2 + Al2O3 ≥ 68%.

[0021] The mass percentages of the said Al2O3, the said rare earth oxides, and the said Fe2O3 satisfy:

[0022] (Al2O3 + rare earth oxides) / Fe2O3 = 1.5 - 56.5.

[0023] The mass percentages of the said TiO2 and the said rare earth oxides satisfy: TiO2 / rare earth oxides = 0 - 0.8.

[0024] It also includes 0 - 0.2% of PbO, and the mass percentage of PbO and Fe2O3 satisfies PbO / Fe2O3 = 0 - 0.85.

[0025] The mass percentages of the said TiO2, the said W, and the said Fe2O3 satisfy: TiO2 + W / Fe2O3 = 0 - 2.6.

[0026] Any one or at least two of the said SiO2, Al2O3, TiO2, Fe2O3, CaO, MgO, K2O, Na2O, rare earth oxides, W, and Pt are of nano - powder material.

[0027] The forming temperature of the said color - changing glass fiber is between 1100°C and 1300°C.

[0028] The rare earth oxide is at least one of the oxides of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and Sc.

[0029] A method for preparing a color-changing glass fiber composition specifically includes the following steps:

[0030] Step S1: Weigh the basic batch materials SiO2, Al2O3, Fe2O3, K2O, Na2O, CaO, MgO, and rare earth oxide according to mass fractions, put them into a grinding machine, and then add any one or at least two of W, Pt, PbO, and TiO2 to the grinding machine;

[0031] Step S2: Add the mixture in Step S1 to a kiln body and heat it to 1100°C - 1550°C to form a glass melt, keep it warm for a period of time to allow each component to melt and mix evenly;

[0032] Step S3: Let the glass melt in Step S2 reach a constant-temperature discharging device through a melt rising channel;

[0033] Step S4: Let the glass melt reach a wire-drawing forming device through a liquid outlet hole, and then carry out high-speed rotary wire-drawing forming through the wire-drawing forming device to obtain color-changing glass fibers.

[0034] A glass fiber is made by the method for preparing a color-changing glass fiber composition.

[0035] The rare earth elements involved in this solution include lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and yttrium (Y) and scandium (Sc), a total of 17 elements closely related to the 15 elements of the lanthanide series. As is well known to those skilled in the art, details are not described herein again.

[0036] Compared with the prior art, the main innovation of the glass fiber composition of the present invention lies in: by introducing rare earth oxides, combined with the comprehensive effects of W and Pt, and supplemented by the Tyndall effect, adjusting the mass percentage content of rare earth oxides and CaO + MgO to satisfy rare earth oxides / (CaO + MgO) = 0.1 - 1.1; the mass percentage content of rare earth oxides and W and Pt satisfies rare earth oxides / (W + Pt) > 2; the mass percentage of SiO2 and Al2O3 satisfies SiO2 + Al2O3 ≥ 68%; the mass percentage of the Al2O3, the rare earth oxides, and the Fe2O3 satisfies: (Al2O3 + rare earth oxides) / Fe2O3 = 1.5 - 56.5; the mass percentage of the TiO2 and the rare earth oxides satisfies: TiO2 / rare earth oxides = 0 - 0.8.

[0037] Through the control of the above specific composition and its ratio, on the one hand, the glass fiber can be made into a mixed crystalline state, avoiding the situation where a single crystal phase plays an absolute dominant role. The competitive growth of multiple crystal phases in appropriate proportions can effectively reduce the rate of ion recombination and arrangement, avoiding the rapid growth of a single crystal phase, so that different crystal phases produce colorful light under light; on the other hand, the synergistic effect between rare earth oxides and W and Pt can be improved, obtaining a better structural packing effect and further improving the mechanical properties of the glass.

[0038] Specifically, the positive effects of the present invention are as follows:

[0039] In this solution, oxides of rare earth elements are used as colorants to make various high-grade colored glasses. The colored glasses doped with rare earth elements have clear hues and bright colors, and even change colors under different lights; the reason is that when the wavelength of the light source is different, the glass has different light absorptions and shows different colors under different light source irradiations;

[0040] In addition, when rare earth elements are combined with W and Pt, the multi-color (color-changing) effect of the glass fiber under different light sources is more obvious. This is the result of the selective absorption of light waves by the coloring elements in the glass fiber. Especially when there are more coloring elements, there are many energy levels and energy states, which can absorb visible light of multiple wavelengths, resulting in the coloring of the glass fiber. When the light source changes, the proportion of the transmitted light wavelength intensity changes, causing the color to change. Therefore, the combination of rare earth elements and W and Pt makes the glass fiber have polychromatism and can be colored in various colors;

[0041] As a typical thermochromic material, Fe2O3 shows different temperatures under different light intensities, presenting red - dark red - reddish brown. Therefore, this is extremely complementary to the color changes caused by rare earth elements + W + Pt, making the polychromatic effect of the glass fiber more prominent; in addition, red also has the effect of preventing ultraviolet rays;

[0042] (3)There are three ionic valences of Ti: Ti 4+ , Ti 3+ , Ti 2+ . In silicate glass, titanium generally exists in the valence state of Ti 4+ . The valence state of Ti 4+ means that all the outermost electrons 3d24s2 of the titanium nucleus are lost, and the d orbit is completely empty, so the "d-d" transition between electrons in the d orbit cannot occur. Therefore, Ti 4+ valence state should be colorless. However, since Ti 4+ ions strongly absorb ultraviolet light, and its absorption band often enters the violet-blue part of the visible light region, resulting in a yellow color in reality. Although Ti 4+ alone does not cause a deep color, it will strongly affect the coloration of other variable-valence transition elements. Even if the content of these transition elements is small, they will still be colored, especially obvious for iron. This is also why the quality evaluation indicators of glass often include the contents of Fe2O3 and TiO2. Mixing with Fe2O3 will result in a brown color. Therefore, the added TiO2 in this scheme still has the effect of changing the color of the glass, but it is in combination with other substances.

[0043] (4)PbO is an orange-yellow solid. Under light, it can make the glass fiber show a light yellow color, and can greatly increase the refractive index of the glass fiber, showing good refraction and dispersion phenomena, and has high ornamental value; its ratio with Fe2O3 can achieve the switching between red and yellow of the glass fiber under different lights. At the same time, PbO combined with W can make the yellow more prominent under specific lights;

[0044] (5)The designed component is made of nano-powder material. On the one hand, it realizes the composite strengthening effect on the glass fiber. On the other hand, the nano-structure significantly increases the loading amount of the thermochromic functional catalyst on the glass fiber and significantly improves the corresponding catalytic performance, enhancing the thermochromic characteristics of the glass fiber;

[0045] The nano-powder also helps to produce the Tyndall effect, making the light irradiated on the glass fiber show a clearer color stratification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a schematic diagram of the close-up structure of the white glass fiber in the present invention.

[0047] Figure 2 is a schematic diagram of the close-up structure of the glass fiber in Example 2 (Group 1) of the present invention under 100 Lux of sunlight.

[0048] Figure 3Schematic diagram of the close - up structure of glass fiber in Example 2 (Group 1) of the present invention under 1000 Lux of sunlight.

[0049] Figure 4 Schematic diagram of the close - up structure of glass fiber in Example 2 (Group 2) of the present invention under 100 Lux of sunlight.

[0050] Figure 5 Schematic diagram of the close - up structure of glass fiber in Example 2 (Group 2) of the present invention under 1000 Lux of sunlight.

[0051] Figure 6 Schematic diagram of the close - up structure of glass fiber in Example 2 (Group 3) of the present invention under 100 Lux of sunlight.

[0052] Figure 7 Schematic diagram of the close - up structure of glass fiber in Example 2 (Group 3) of the present invention under 1000 Lux of sunlight. Detailed implementation manners

[0053] In order to more clearly illustrate the technical features of this solution, the following is an elaboration of this solution through specific implementation manners.

[0054] A preparation method of a color - changing glass fiber composition specifically includes the following steps:

[0055] Step S1: Weigh the basic batch materials SiO2, Al2O3, Fe2O3, K2O, Na2O, CaO, MgO, and rare - earth oxides according to mass fractions, put them into a grinder, and then add any one or at least two of W, Pt, PbO, and TiO2 to the grinder;

[0056] Step S2: Add the mixture in Step S1 to a kiln body for heating, heat it to 1100 °C - 1550 °C to form a glass melt, keep it warm for a period of time to allow each component to melt and mix evenly;

[0057] Step S3: Let the glass melt in Step S2 reach a constant - temperature discharging device through a melt rising channel;

[0058] Step S4: Let the glass melt reach a wire - drawing forming device through a liquid outlet hole, and then carry out high - speed rotary wire - drawing forming through the wire - drawing forming device to obtain the color - changing glass fiber. Example 1:

[0059] A color - changing glass fiber composition, by mass percentage, contains 63% - 74% of SiO2, 2% - 7% of Al2O3, 0.23% - 1.4% of Fe2O3, 3% - 7% of CaO, 2% - 6% of MgO, 0.1% - 0.5% of K2O, and 10% - 17% of Na2O;

[0060] The mass percentages of SiO2 and Al2O3 satisfy SiO2 + Al2O3 ≥ 68%.

[0061] Moreover, the total content of the above components is equal to 95.5%. It should be noted that each embodiment in this solution is not limited to the specific components disclosed in this solution. Under different components, it will inevitably affect the body color of the glass fiber, but it does not affect the realization of the color change of the glass fiber under different illuminations. Therefore, only for the purpose of illustrating the color-changing effect of the glass fiber, other components of the glass fiber will not be listed in detail in this solution. Table 1 is the color-changing table of the glass fiber under various components in Example 1.

[0062] Table 1 is the color-changing table of the glass fiber under various components in Example 1

[0063] Case Project Example 1 (Group 1) Example 1 (Group 2) Example 1 (Group 3) Comparative Example <![CDATA[SiO2]]> 64.5 65.0 64.6 68.66 <![CDATA[Al2O3]]> 5.5 5.0 5.4 4.5 <![CDATA[Fe2O3]]> 1 0.9 1 0.74 CaO 6 5.8 6.1 5.0 MgO 5 5.3 4.9 4.0 <![CDATA[K2O]]> 0.5 0.5 0.4 0.3 <![CDATA[Na2O]]> 13 13 13.1 12.3 Molding Temperature 1250℃ 1260℃ 1253℃ 1285℃ Daylight 100Lux White White White White Daylight 1000Lux White White White White Example 2:

[0064] On the basis of Example 1, preferably, it further includes 2-3% rare earth oxides, 0-0.5% W, 0-0.5% Pt. Among them, the mass percentage content of rare earth oxides and CaO + MgO satisfies rare earth oxides / (CaO + MgO) = 0.2-0.3; the mass percentage content of rare earth oxides and W and Pt satisfies rare earth oxides / (W + Pt) = 2.0-5.0;

[0065] The mass percentages of the said Al2O3, the said rare earth oxides, and the said Fe2O3 satisfy:

[0066] (Al2O3 + rare earth oxides) / Fe2O3 = 7.8-9.0. Table 2 is the color-changing table of the glass fiber under various components in Example 2. For details, see Figure 1 - Figure 7 .

[0067] Table 2 is the color-changing table of the glass fiber under various components in Example 2.

[0068] Case Project Example 2 (Group 1) Example 2 (Group 2) Example 2 (Group 3) Comparative Example <![CDATA[SiO2]]> 64.5 65.0 64.6 68.66 <![CDATA[Al2O3]]> 5.5 5.0 5.4 4.5 <![CDATA[Fe2O3]]> 1 0.9 1 0.74 CaO 6 5.8 6.1 5.0 MgO 5 5.3 4.9 4.0 <![CDATA[K2O]]> 0.5 0.5 0.4 0.3 <![CDATA[Na2O]]> 13 13 13.1 12.3 Nd 2.5 2.7 2.9 WO2.90 0.5 0.4 0.3 Pt 0.5 0.4 0.3 Molding Temperature 1246℃ 1254℃ 1248℃ 1285℃ Daylight 100Lux Dark Blue, Light Purple Blue - Violet Light Blue - Violet White Daylight 1000Lux Light Blue, Light Magenta - Red Light Blue, Magenta - Red Magenta - Red White Example 3:

[0069] On the basis of Example 1 and Example 2, it further includes 0-0.1% of TiO2; the mass percentages of the said TiO2 and the said rare earth oxides satisfy: TiO2 / rare earth oxides = 0.02-0.04. Table 3 is the color-changing table of the glass fiber under various components in Example 3.

[0070] Table 3 is the color-changing table of the glass fiber under various components in Example 3

[0071] Case Project Example 3 (Group 1) Example 3 (Group 2) Example 3 (Group 3) Comparative Example <![CDATA[SiO2]]> 64.5 65.0 64.6 68.66 <![CDATA[Al2O3]]> 5.5 5.0 5.4 4.5 <![CDATA[Fe2O3]]> 1 0.9 1 0.74 CaO 6 5.8 6.1 5.0 MgO 5 5.3 4.9 4.0 <![CDATA[K2O]]> 0.5 0.5 0.4 0.3 <![CDATA[Na2O]]> 13 13 13.1 12.3 Nd 2.5 2.7 2.9 WO2.90 0.5 0.4 0.3 Pt 0.5 0.4 0.3 <![CDATA[TiO2]]> 0.1 0.08 0.09 Molding Temperature 1244℃ 1253℃ 1246℃ 1285℃ Daylight 100Lux Light Blue - Green, Light Purple Blue - Violet Light Blue - Violet White Daylight 1000Lux Light Green, Light Magenta - Red, Dark Brown Light Green, Magenta - Red, Light Brown Magenta - Red, Bright Color White Example 4:

[0072] Based on Examples 1, 2, and 3, it further includes 0 - 0.2% of PbO, and the mass percentage of PbO and Fe2O3 satisfies PbO / Fe2O3 = 0.1 - 0.2. Table 4 is the color change table of glass fibers under various components in Example 4.

[0073] Table 4 is the color change table of glass fibers under various components in Example 4

[0074] Case Project Example 4 (Group 1) Example 4 (Group 2) Example 4 (Group 3) Comparative Example <![CDATA[SiO2]]> 64.5 65.0 64.6 68.66 <![CDATA[Al2O3]]> 5.5 5.0 5.4 4.5 <![CDATA[Fe2O3]]> 1 0.9 1 0.74 CaO 6 5.8 6.1 5.0 MgO 5 5.3 4.9 4.0 <![CDATA[K2O]]> 0.5 0.5 0.4 0.3 <![CDATA[Na2O]]> 13 13 13.1 12.3 Nd 2.5 2.7 2.9 WO2.90 0.5 0.4 0.3 Pt 0.5 0.4 0.3 <![CDATA[TiO2]]> 0.1 0.08 0.09 PbO 0.1 0.12 0.15 Molding Temperature 1242℃ 1252℃ 1245℃ 1285℃ Daylight 100Lux Light Blue - Green, Light Purple Blue - Violet Light Blue - Violet White Daylight 1000Lux Light Green, Light Magenta - Red, Dark Brown Light Green, Magenta - Red, Light Brown Magenta - Red, Bright Color White Example 5:

[0075] Based on Examples 1, 2, 3, and 4, the mass percentages of TiO2, W, and Fe2O3 satisfy: TiO2 + W / Fe2O3 = 0.3 - 0.6. Table 5 is the color change table of glass fibers under various components in Example 5.

[0076] Table 5 is the color change table of glass fibers under various components in Example 5

[0077] Case Project Example 5 (Group 1) Example 5 (Group 2) Example 5 (Group 3) Comparative Example <![CDATA[SiO2]]> 64.5 65.0 64.6 68.66 <![CDATA[Al2O3]]> 5.5 5.0 5.4 4.5 <![CDATA[Fe2O3]]> 1 0.9 1 0.74 CaO 6 5.8 6.1 5.0 MgO 5 5.3 4.9 4.0 <![CDATA[K2O]]> 0.5 0.5 0.4 0.3 <![CDATA[Na2O]]> 13 13 13.1 12.3 Nd 2.5 2.7 2.9 WO2.90 0.5 0.4 0.3 Pt 0.5 0.4 0.3 <![CDATA[TiO2]]> 0.1 0.08 0.09 PbO 0.1 0.12 0.15 Molding Temperature 1242℃ 1252℃ 1245℃ 1285℃ Daylight 100Lux Light Blue - Green, Light Purple Blue - Violet Light Blue - Violet White Daylight 1000Lux Light Green, Light Magenta - Red, Dark Brown Light Green, Magenta - Red, Light Brown Magenta - Red, Bright Color White

[0078] For each embodiment in this solution, the specific analysis is as follows:

[0079] (1) Through experiments, when the light intensity is between 100 Lux and 1000 Lux, the color depth and color difference of the products in each embodiment change significantly; under the same light intensity, different components also show color change phenomena. Therefore, the overall color presentation of the glass fiber is the result of the combined action of light intensity and the chemical composition of each substance. In this solution, only limited experiments are used to illustrate the color change effect of the glass fiber, hereby noted.

[0080] (2) SiO2 is the main oxide forming the glass skeleton. Compared with S glass, in order to improve the color change property of the glass, the present invention significantly increases the SiO2 content on the basis of adding rare earth elements. In the glass fiber composition of the present invention, the weight percentage content range of SiO2 is defined as 63 - 74%. Preferably, the weight percentage content range of SiO2 can be defined as 64 - 68%. Although SiO2 cannot emit light, there are various defects in the SiO2 network structure, and these defects have good luminescence properties. It is the existence of a variety of defect centers with high - efficiency luminescence that makes SiO2 a very important fluorescent luminescent material, enabling its emission spectrum to cover the entire visible light region from blue to red. Coupled with its special porous network center structure, it is extremely suitable as the matrix of rare - earth - ion - doped fluorescent luminescent materials. Therefore, the combination of SiO2 and rare earth elements helps to increase the brightness of different colors presented by the glass fiber.

[0081] (3) Al2O3 is also an oxide that forms the glass skeleton and can play a substantial role in the mechanical properties of the glass when combined with SiO2. If its content is too low, sufficient high mechanical properties cannot be obtained; if its content is too high, the risk of glass crystallization is likely to increase significantly. In the glass fiber composition of the present invention, the weight percentage content range of Al2O3 is limited to 2-7%, and more preferably, the range is between 4% and 6%. This greatly shortens the glass melting time and clarification time. However, compared with the prior art, the content is still relatively low. However, the rare earth oxide added has a much larger ionic radius than the aluminum ion and is difficult to form a solid solution with Al2O3. Therefore, the rare earth exists at the grain boundaries of Al2O3, reducing the grain boundary migration rate and inhibiting grain growth, which is beneficial to the formation of a dense structure and improves the strength of the glass phase. Therefore, the low content of Al2O3 not only does not affect the mechanical properties of the glass fiber, but also has the effect of shortening the glass melting time and clarification time.

[0082] An innovation point in this solution is that, compared with the prior art, the composition range of SiO2 is increased, and the composition range of Al2O3 is decreased, in combination with rare earth elements. At the same time, the mass percentages of SiO2 and Al2O3 are limited to satisfy SiO2 + Al2O3 ≥ 68%. This can not only ensure the color-changing effect of the glass fiber, but also ensure the strength and modulus of the glass fiber.

[0083] (3) In the present invention, the set CaO is 3%-7% and MgO is 2%-6%. Compared with the prior art, the content ratios of CaO and MgO are both significantly decreased, and their content ratios are also roughly the same. This idea is completely different from the existing technical solutions. On the premise that the ratios of MgO and CaO are not very different, adding rare earth elements can effectively improve the microstructure of the glass fiber, reduce pores, and increase the density of the glass fiber.

[0084] The reason for limiting the content ratios of the rare earth oxide to MgO and CaO is that MgO and CaO play similar roles in the glass fiber, and their effects on the melting temperature are both dual. On the one hand, they can increase the initial melting temperature of the glass-ceramics, and on the other hand, they can significantly reduce the melting temperature under high-temperature conditions. However, this effect of reducing the melting temperature will gradually weaken with the increase in the addition amounts of MgO and CaO, reducing their melting temperature, and thus effectively improving the microstructure of the glass fiber.

[0085] (4) W can form four stable oxides: yellow oxide (WO3), blue oxide (WO2.90), purple oxide (WO2.72), and brownish oxide (WO2). Therefore, its color-changing range is relatively wide. Limiting the rare earth oxide / (W + Pt) > 2 is mainly to avoid the coverage of the color-changing effect of W + Pt on the rare earth color-changing effect, so that the glass fiber can not only exhibit the color-changing effect of rare earth elements but also show the color-changing effect of W + Pt on the glass fiber.

[0086] (5) The color-changing range of Fe2O3 presents in red - dark red - reddish brown. Limiting (Al2O3 + rare earth oxide) / Fe2O3 = 1.5 - 56.5. In principle, on the one hand, it avoids the decisive role of red Fe2O3 in the color-changing effect of rare earth oxides. On the other hand, the combination of Al2O3, rare earth oxides, and Fe2O3 helps to improve the corrosion resistance of the glass fiber, helps to improve the bonding strength between various components, and brings more benefits to the performance of the glass fiber.

[0087] (6) The high-temperature phase of TiO2 is the rutile crystal form, whose band gap is 2.8 eV, smaller than that of anatase TiO2. The light response wavelength shifts towards the long-wave direction, and its light absorption performance is excellent. Moreover, the photocatalytic performance of TiO2 is closely related to its luminescence properties. Rare earth elements have f electrons and are prone to generate multi-electron configurations. Their oxides also have polymorphism, strong adsorption selectivity, good thermal stability, and electronic conductivity. Doping with rare earth elements can improve the inhibition of the recombination of photo-generated electrons and holes in TiO2, thereby improving the luminescence performance. The reason for limiting TiO2 / rare earth oxide = 0 - 0.8 is that the influence of rare earth oxides on the luminescence performance of TiO2 is relatively complex. Only when the absorption peak position of the XRD curve of TiO2 changes due to rare earth elements can the luminescence performance of TiO2 be affected.

[0088] (7) Limiting the mass percentages of PbO and Fe2O3 to satisfy PbO / Fe2O3 = 0 - 0.85. On the one hand, PbO can lower the melting point of the glass fiber. On the other hand, it has a relatively high refractive index, with relatively high refraction and dispersion degrees. The higher the dispersion degree, the more colors are dispersed, and it can produce brilliant luster. Therefore, the addition of PbO can make the glass fiber exhibit excellent color-changing effects. In addition, PbO / Fe2O3 = 0 - 0.85, and this ratio can ensure that PbO and Fe2O3 do not affect each other when exerting the color-changing effect;

[0089] PbO is a yellow or slightly red-yellow powder or small flaky crystal, which is prone to color change when exposed to light. Therefore, it increases the color-changing effect of the glass fiber;

[0090] (8) It is specified that the mass percentages of TiO2, W, and Fe2O3 satisfy: TiO2 + W / Fe2O3 = 0 - 2.6. Although Ti 4+ alone does not cause a deep color, it strongly affects the coloration of other variable-valence transition elements. Even if these transition elements are in small amounts, they will still show coloration, which is particularly obvious for iron. The quality evaluation indicators of glass raw materials often include the contents of Fe2O3 and TiO2. Mixing with Fe2O3 will result in a brown color. Therefore, the added TiO2 in this solution still has the effect of changing the color of the glass, but it is in cooperation with other substances.

[0091] Adding W to silver-free glass makes the glass fiber exhibit photochromic properties after being irradiated by light, especially under the action of ultraviolet light, that is, it shows the characteristic of light and dark changes under different lighting conditions.

[0092] In this solution, a comparative example is set, and its component ratio is quite different from that of other embodiments, aiming to explore the color-changing performance of glass fiber under different light intensities when the main components are quite different; while the component changes in Embodiment 1, Embodiment 2, and Embodiment 3 are relatively small, aiming to explore the color-changing effect of glass fiber under different light intensities when trace components change.

[0093] The technical features not described in the present invention can be realized by or adopted from the prior art, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A color-changing glass fiber composition, characterized in that, As follows by mass percentage: SiO2 63% - 74% Al2O3 2% - 7% Fe2O3 0.23% - 1.4% CaO 3% - 7% MgO 2% - 6% K2O 0.1% - 0.5% Na2O 10% - 17% Rare earth oxides 0.1% - 6% W 0-0.5% Pt 0 - 0.5% TiO2 0 - 0.1%; Among them, the mass percentage content of rare earth oxides and CaO + MgO satisfies rare earth oxides / (CaO + MgO) = 0.1 - 1.1; The mass percentage content of rare earth oxides and W and Pt satisfies rare earth oxides / (W + Pt) > 2; The mass percentage of SiO2 and Al2O3 satisfies SiO2 + Al2O3 ≥ 68%.

2. The color-changing glass fiber composition according to claim 1, characterized in that, The mass percentages of the said Al2O3, the said rare earth oxides, and the said Fe2O3 satisfy: (Al2O3 + rare earth oxides) / Fe2O3 = 1.5 - 56.

5.

3. The color-changing glass fiber composition according to claim 1, wherein The mass percentages of the said TiO2 and the said rare earth oxides satisfy: TiO2 / rare earth oxides = 0 - 0.

8.

4. The color-changing glass fiber composition according to claim 1, characterized in that, It also includes 0 - 0.2% of PbO, and the mass percentage of PbO and Fe2O3 satisfies PbO / Fe2O3 = 0 - 0.

85.

5. The color-changing glass fiber composition according to claim 1, wherein The mass percentages of the said TiO2, the said W, and the said Fe2O3 satisfy: TiO2 + W / Fe2O3 = 0 - 2.

6.

6. The color-changing glass fiber composition according to claim 1, characterized in that, Any one or at least two of the said SiO2, the said Al2O3, the said TiO2, the said Fe2O3, the said CaO, the said MgO, the said K2O, the said Na2O, the said rare earth oxides, the said W, and the said Pt are of nano - powder material.

7. The color-changing glass fiber composition according to claim 1, wherein The forming temperature of the said color - changing glass fiber is between 1100°C and 1300°C.

8. The color-changing glass fiber composition according to claim 1, wherein The said rare earth oxides are at least one of the oxides of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and Sc.

9. A method for preparing the color-changing glass fiber composition according to claim 4, characterized in that, Specifically, it includes the following steps: Step S1: Weigh the basic batch materials SiO2, Al2O3, Fe2O3, K2O, Na2O, CaO, MgO, and rare earth oxides by mass fraction, put them into a grinder, and then add any one or at least two of W, Pt, PbO, and TiO2 to the grinder; Step S2: Add the mixture in Step S1 to a kiln body for heating, heat it to 1100°C - 1550°C to form a glass melt, keep it warm for a period of time to let each component melt and mix evenly; Step S3: Let the glass melt in Step S2 reach a constant - temperature discharging device through a melt - rising channel; Step S4: Let the glass melt reach a wire - drawing forming device through a liquid - discharging hole, and then carry out high - speed rotary wire - drawing forming through the wire - drawing forming device to obtain the color - changing glass fiber.

10. A glass fiber, characterized in that, The glass fiber is made by the preparation method of the color - changing glass fiber composition as described in Claim 9.

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