Ultra-white amorphous aluminum silicon oxide material

Abstract

The present application relates to amorphous inorganic oxide material, discloses a kind of super white amorphous aluminosilicate material.The super white amorphous aluminosilicate material of the present application, first by controlling the iron content in raw material is less than 120ppm, then by adding suitable chemical decoloring agent and physical decoloring agent and making physical decoloring agent meet certain proportional relationship, thus ensure that the transmittance of super white amorphous aluminosilicate material is greater than 92.0%, and make chromaticity coordinate move according to the a*、b* value of uniform chromaticity space standard to the direction of "white point" (origin "0,0"), visual material "whiter".

Description

[0001] This application is a divisional application of the application with the application date of February 13, 2023, the application number of 202310101929.2, and the title of "Ultra-white amorphous aluminum-silicon oxide material and its preparation method as well as metal plated product". TECHNICAL FIELD

[0002] The present application relates to the field of amorphous inorganic oxide materials, in particular to an ultra-white amorphous aluminum-silicon oxide material. BACKGROUND

[0003] High-aluminum glass is one of the most widely used materials in amorphous materials. It can increase surface hardness through chemical strengthening, improve scratch resistance, and significantly increase bending and impact resistance. In addition, it is relatively thin and can replace thick glass to achieve lightweight, thereby being more widely used in display screen protective glass (mobile phones, tablets, laptops, car navigation, etc.), transparent parts of vehicles (high-speed rail locomotive front glass, car body glass, aircraft transparent parts, etc.), etc. However, these applications require the glass to have high transparency and "whiteness", i.e., not only the light transmittance should be high, but also the color coordinates a* and b* should be closer to the origin "0, 0" according to the ICE (International Commission on Illumination) 1976 uniform chromaticity space standard, i.e., the closer to "white" the better.

[0004] The raw materials used in the production of high-aluminum glass inevitably contain impurities such as iron. The oxides of iron in the glass are variable-valence oxides, and there are Fe 2+ and Fe 3+ Iron ions exist, and divalent iron appears green and trivalent iron appears yellow in the glass.

[0005] Reducing the content of iron oxides in various raw materials is one of the most direct and effective methods to increase the light transmittance of the glass and reduce the color coordinates a* and b*, but as we all know, the lower the iron content in the raw material, the higher the price. For example, the cost of silica sand with an iron content of 50 ppm and 80 ppm increases significantly, and the same applies to other raw materials. Therefore, how to provide an ultra-white glass material that balances production cost, light transmittance, and color requirements is a technical problem that needs to be solved urgently. SUMMARY

[0006] Therefore, the purpose of the present application is to provide an ultra-white amorphous aluminum-silicon oxide material and its preparation method, so that the color coordinates a* and b* of the material are closer to the origin "0, 0", the color is whiter, and the light transmittance is higher.

[0007] Another purpose of the present application is to provide a metal plated product based on the above-mentioned ultra-white aluminum-silicon oxide material and its preparation method.

[0008] In order to solve the above technical problems / achieve the above purposes or at least partially solve the above technical problems / achieve the above purposes, as a first aspect of the present application, an ultra-white amorphous aluminum-silicon oxide material is provided, comprising (1) inorganic oxide, (2) Se and / or Nd2O3, and (3) Co2O3; the Se and / or Nd2O3 accounts for 0.5-1.5 ppm of the total weight of the ultra-white amorphous aluminum-silicon oxide material, the Co2O3 accounts for 0.3-0.9 ppm of the total weight of the ultra-white amorphous aluminum-silicon oxide material, and the inorganic oxide comprises, by weight percentage:

[0009]

[0010] wherein the iron content in the inorganic oxide is less than 120 ppm of the total weight of the ultra-white amorphous aluminum-silicon oxide material.

[0011] Optionally, the contents of Se, Nd2O3, and Co2O3 satisfy the requirements of formula 1:

[0012] 0.3≤Co2O3 / (Se+Nd2O3)≤1 formula 1.

[0013] As a second aspect of the present application, a preparation method of the ultra-white amorphous aluminum-silicon oxide material is provided, comprising:

[0014] Various raw materials are taken according to the composition of the ultra-white amorphous aluminum-silicon oxide material, and sulfate and / or nitrate are added for mixing to obtain a mixture, and the mixture is melted, shaped, annealed, and sliced to produce the ultra-white amorphous aluminum-silicon oxide material.

[0015] Optionally, the sulfate comprises sodium sulfate and / or potassium sulfate, and the nitrate comprises sodium nitrate and / or potassium nitrate; further optionally, the addition amount of the sulfate is 0.4-1.6 kg per 100 kg of the mixture, and the addition amount of the nitrate is 2.0-4.0 kg per 100 kg of the mixture.

[0016] Optionally, the residual oxygen content is greater than 2% at the discharge port side during the preparation process.

[0017] As a third aspect of the present application, based on the excellent chemical strengthening performance and efficiency of the ultra-white amorphous aluminum-silicon oxide material described in the present application, the application of the ultra-white amorphous aluminum-silicon oxide material or the ultra-white amorphous aluminum-silicon oxide material prepared by the preparation method described in the present application in the preparation of metal-coated products is proposed.

[0018] As a fourth aspect of the present application, a metal-coated product is proposed, comprising the ultra-white amorphous aluminum-silicon oxide material described in the present application or the ultra-white amorphous aluminum-silicon oxide material prepared by the preparation method described in the present application, and one or more than two layers of metal films plated on the surface thereof.

[0019] Optionally, the metal film comprises one or more of Cr film, Ni film, Ti film, Au film, Ag film, Cu film, and Al film, and the metal film is plated by chemical vapor deposition, vacuum evaporation, sputtering, or ion implantation.

[0020] Compared with the same kind of amorphous aluminum silicon oxide material, the super white amorphous aluminum silicon oxide material of the present application firstly controls the total introduction amount of ferric oxide impurities in raw materials to be less than 120 ppm, and then adds appropriate chemical and physical decoloring agents and makes the physical decoloring agent meet a certain proportion relationship, thereby ensuring that the light transmittance of the super white amorphous aluminum silicon oxide material is greater than 92.0%, and the chromaticity coordinates move towards the "white point" (origin "0, 0") according to the a* and b* values of the uniform chromaticity space standard, and the glass is visually "whiter". BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The preparation process flow chart of the super white amorphous aluminum silicon oxide material of the present application is shown.

[0022] Figure 2 The chromaticity coordinate diagram of the embodiment of the present application is shown, that is, the coordinate diagram of the a* and b* values of the super white amorphous aluminum silicon oxide material of the embodiment of the present application in the chromaticity control area under the reference thickness, and the elliptical area in the figure is the area constructed by ICE requirement (b-0.14) x 2 / 0.0016 + (a+0.012) x 2 / 0.000324 = 2".

[0023] Figure 3 The chromaticity coordinate diagram of the comparative example is shown, that is, the coordinate diagram of the a* and b* values of the reference thickness of the control material in the chromaticity control area, and the elliptical area in the figure is the area constructed by ICE requirement (b-0.14) x 2 / 0.0016 + (a+0.012) x 2 / 0.000324 = 2". DETAILED DESCRIPTION

[0024] The present application discloses a super white amorphous aluminum silicon oxide material, and those skilled in the art can refer to the content herein and appropriately improve the process parameters for implementation. It is particularly important to note that all similar substitutions and changes are obvious to those skilled in the art, and they are considered to be included in the present application. The products, processes and applications described in the present application have been described by preferred embodiments, and relevant personnel can obviously make changes or appropriate changes and combinations to the products, processes and applications described herein without departing from the content, spirit and scope of the present application, to realize and apply the technology of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0025] It should be noted that, in the present document, relational terms such as "first" and "second", and "step 1" and "step 2", and "a" and "an", and "one" and "another" and the like are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a", "comprising... a", or "comprises... one" does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element. The embodiments and features discussed herein can be combined with each other as mutually consistent, without conflicts.

[0026] In a first aspect of the present application, there is provided an ultra-white amorphous aluminosilicate material comprising (1) inorganic oxides, (2) Se or Nd2O3, and (3) Co2O3; the Se or Nd2O3 is 0.5-1.5 ppm by weight of the total weight of the ultra-white amorphous aluminosilicate material, the Co2O3 is 0.3-0.9 ppm by weight of the total weight of the ultra-white amorphous aluminosilicate material, and the inorganic oxides comprise, by weight percent:

[0027]

[0028] wherein the inorganic oxides comprise less than 120 ppm of iron (as Fe2O3) by weight of the total weight of the ultra-white amorphous aluminosilicate material.

[0029] In certain embodiments of the present application, the SiO2 is 58%, 60.5%, 60.7%, 61%, or 61.4% by weight, the Al2O3 is 13%, 13.5%, 13.8%, or 15% by weight, the Na2O is 13%, 14%, 15%, or 16% by weight, the K2O is 4%, 6%, 6.3%, or 7% by weight, the MgO is 3%, 4%, 4.5%, 4.8%, or 4.9% by weight, and the ZrO2 is 0.5%, 0.6%, 0.8%, 1.0%, or 1.2% by weight.

[0030] In certain embodiments of the application, the Se or Nd2O3 is present in an amount of 0.5 ppm, 0.8 ppm, 1.0 ppm, 1.1 ppm, 1.3 ppm, or 1.5 ppm by weight of the total weight of the ultra-white amorphous aluminosilicate oxide material, and the Co2O3 is present in an amount of 0.3 ppm, 0.5 ppm, 0.6 ppm, 0.7 ppm, 0.8 ppm, or 0.9 ppm by weight of the total weight of the ultra-white amorphous aluminosilicate oxide material.

[0031] In certain embodiments of the application, the inorganic oxide has an amount of iron (as Fe2O3) less than 120 ppm, 110 ppm, 100 ppm, or 90 ppm by weight of the total weight of the ultra-white amorphous aluminosilicate oxide material, for example, it can be 82 ppm, 85 ppm, 90 ppm, 100 ppm, 112 ppm, or 118 ppm.

[0032] Further, it has been verified by experiments of the present application that the content of Se, Nd2O3, and Co2O3 satisfying the requirement of Formula 1 can make the light transmittance greater than 92.0%, and move the chromaticity coordinates according to the a* and b* values of the uniform chromaticity space standard in the direction of the "white point" (origin "0, 0"):

[0033] 0.3≤ Co2O3 / (Se+Nd2O3)≤ 1 Formula 1.

[0034] In certain embodiments of the application, the value of the parameter of Formula 1 is 0.375, 0.55, 0.6, 0.62, 0.7, or 1.0.

[0035] In certain embodiments of the application, the ultra-white amorphous aluminosilicate oxide material has a thickness of 0.8-4 mm, and specifically can be an aluminosilicate inorganic oxide glass material, for example, a high-alumina glass material.

[0036] In certain embodiments of the application, the ultra-white amorphous aluminosilicate oxide material is immersed in a pure potassium nitrate (or 99% potassium nitrate + 1% sodium nitrate) molten salt at a temperature of 430°C for 150 min, and the surface stress CS is greater than or equal to 800 MPa, and the stress layer depth DOL is greater than or equal to 43 μm. In certain other embodiments of the application, the ultra-white amorphous aluminosilicate oxide material of the present application moves according to the a* and b* values of the uniform chromaticity space standard of the ICE (International Commission on Illumination) in 1976 in the direction of the "white point" "0, 0", and specifically, with a thickness of 1.10 mm as the reference thickness, at the reference thickness, the a* and b* values are both within the region constructed by the elliptic equation "(b-0.14)2 / 0.0016+(a+0.012)2 / 0.000324=2", while the other control materials are all outside this region, indicating that the chromaticity of the material of the present application is whiter, and the light transmittance of more than 92% is also better than that of each control material.

[0037] In a second aspect of the present application, a preparation method of the super-white amorphous aluminum-silicon oxide material is provided, comprising:

[0038] Various raw materials are taken according to the composition of the super-white amorphous aluminum-silicon oxide material, and sulfates and nitrates are added for mixing to obtain a mixture. The mixture is melted, shaped, annealed, and sliced to produce the super-white amorphous aluminum-silicon oxide material. The process flow chart is shown in Figure 1 .

[0039] In the process, the mixture is transported to a weighing machine by a conveyor belt, weighed by the weighing machine, and then put into a mixer for warm water mixing. After the mixture reaches the preset requirements, it is transported to a kiln by a conveyor belt for warm melting. The raw materials are melted and form a liquid by heating the kiln with natural gas. After the liquid is clarified by bubble removal, it flows into a tin tank and is drawn into a pre-set thickness of amorphous aluminum-silicon oxide material plate by a draw machine. After the amorphous aluminum-silicon oxide material plate comes out of the tin tank, it enters the annealing kiln for annealing treatment. After the internal stress is eliminated, the amorphous aluminum-silicon oxide material plate comes out of the annealing kiln and enters the cold end for slicing, packaging, and packaging. The amorphous aluminum-silicon oxide material of the present application can specifically belong to a low-alkali earth metal alkali-aluminum silicate glass material, such as a low-alkali earth metal high-aluminum glass material.

[0040] In some embodiments of the present application, the sulfates include sodium sulfate and / or potassium sulfate, and the nitrates include sodium nitrate and / or potassium nitrate, which will be converted into volatile gases and corresponding K2O and Na2O in the material melting process, without affecting the material composition. In some other embodiments of the present application, the amount of the sulfates added is 0.4-1.6 kg per 100 kg of the mixture, such as 0.40 kg, 0.55 kg, 0.72 kg, 0.92 kg, 0.92 kg, 1.22 kg, or 1.52 kg, and the amount of the nitrates added is 2.0-4.0 kg per 100 kg of the mixture, such as 2.0 kg, 2.6 kg, 2.9 kg, 3.6 kg, or 4.0 kg.

[0041] In some embodiments of the present application, by controlling the atmosphere during the material melting process, especially near the end (outlet side) of the kiln, the residual oxygen content is maintained to be greater than 2%, i.e., an oxidizing atmosphere is maintained, so that the Fe 3+ content in the material is higher than the Fe 2+ content, which can make the color of the material lighter.

[0042] In the preparation method of the present application, oxidizing raw materials such as nitrates and sulfates are added to improve the redox index of the mixture, so that the Fe 3+ content in the material is higher than the Fe 2+, so as to realize the chemical decolorization effect; the sulfate and nitrate not only have oxidation effect, but also have other positive or negative effects on the melting of the material, so the use amount of the two in the material has its own upper limit. For example, the sulfate is a fining agent, and appropriate amount can eliminate glass bubbles, but excessive amount will cause the increase of bubbles, and on the other hand, it has a corrosive effect on the kiln refractory material, and the amount is usually 0.4%-1.6% in the mixture. The amount of nitrate is usually 2.0%-4.0% in the mixture. The amount of sulfate and nitrate is used in combination, so that the redox index of the mixture is adjusted to more than +25, for example, +25.7, +25.9, +26.8, +27.4, +27.9, etc.

[0043] In the preparation method of the present application, selenium and / or neodymium oxide are used to offset the Fe 2+ ion color, and cobalt oxide is used to offset the Fe 3+ ion color. However, the physical decolorizing agent, while removing the original color of the material, will cause the "brightness" of the glass to decrease, that is, the light transmittance of the glass will decrease, so the amount of the "offset" primary color element and the amount of the physical decolorizing agent need to be controlled. That is, the content of iron (calculated as Fe2O3) in the material is controlled to be less than 120 ppm, the amount of selenium powder added is controlled to be 0.8-1.5 ppm, the amount of neodymium oxide added is controlled to be 0.5-1.0 ppm, and the amount of cobalt oxide added is controlled to be 0.3-0.9 ppm, while meeting the requirements of formula 1, so that the light transmittance of the glass can be greater than 92.0%, and the yellow and green colors caused by Fe 2+ and Fe 3+ in the glass can be substantially offset.

[0044] In the third aspect of the present application, based on the excellent performance of the aforementioned super-white amorphous aluminum-silicon oxide material of the present application, the application of the super-white amorphous aluminum-silicon oxide material or the super-white amorphous aluminum-silicon oxide material prepared by the preparation method in the preparation of metal-coated products is proposed.

[0045] In the fourth aspect of the present application, a metal-coated product is proposed, which comprises the super-white amorphous aluminum-silicon oxide material or the super-white amorphous aluminum-silicon oxide material prepared by the preparation method of the present application, and one or more than two metal films coated on the surface thereof. By using the amorphous aluminum-silicon oxide material of the present application as the ingredients and coating the metal material thereon, various application purposes can be achieved on the basis of excellent performance, such as privacy, sun-shading, heat-insulating, etc.

[0046] In some embodiments of the present application, the metal film comprises one or more of Cr film, Ni film, Ti film, Au film, Ag film, Cu film, and Al film. Cr film, Ni film, and Ti film have good adhesion to the amorphous aluminum silicon oxide material, but the infrared reflectivity is not as good as Au film, Ag film, Cu film, and Al film. Therefore, in some other embodiments of the present application, a layer or more than one layer of Cr film, Ni film, or Ti film is first coated on the amorphous aluminum silicon oxide material, and then a layer or more than one layer of Au film, Ag film, Cu film, or Al film is coated thereon, so as to achieve good adhesion and heat insulation.

[0047] In some embodiments of the present application, the thickness of the Cr film, Ni film, or Ti film is 1-10 nm, for example, 1 nm, 2 nm, 3 nm, 4 nm, 5 nm, 6 nm, 7 nm, 8 nm, 9 nm, or 10 nm, and the thickness of the Au film, Ag film, Cu film, or Al film is 20-50 nm, for example, 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm, or 50 nm. In some other embodiments of the present application, a 5-nm-thick Ti film is first coated on the amorphous aluminum silicon oxide material, and then a 30-nm-thick Cu film is coated thereon.

[0048] In some embodiments of the present application, the metal film is coated by chemical vapor deposition, vacuum evaporation, sputtering, or ion implantation. In some other embodiments of the present application, the metal film is coated by magnetron sputtering.

[0049] In some embodiments of the present application, the sputtering power of the magnetron sputtering is 1.5-10 kW, and the sputtering rate is 1.5-5.0 nm / s. In some other embodiments of the present application, when the first layer of Cr film, Ni film, or Ti film is coated, the sputtering power is 1.5-1.7 kW, and the sputtering rate is 1.5-2.0 nm / s; when the second layer of Au film, Ag film, Cu film, or Al film is coated, the sputtering power is 5-10 kW, and the sputtering rate is 3.0-5.0 nm / s.

[0050] In each group of comparative experiments provided in the present application, unless otherwise specified, the experimental conditions, materials, and the like remain unchanged except for the differences indicated in each group, so as to have comparability. The experimental materials and reagents used in the examples can be obtained from commercial channels unless otherwise specified.

[0051] The following further describes an ultrawhite amorphous aluminum silicon oxide material provided in the present application.

[0052] Examples 1-6:

[0053] 1. Preparation method

[0054] According to the composition of the ultra-white amorphous aluminum silicon oxide material, various raw materials are taken, sulfate and nitrate are added for mixing, a mixed material is obtained, the mixed material is melted, shaped, annealed, and sliced to make the ultra-white amorphous aluminum silicon oxide glass material, and the preparation process flow is shown in Figure 1 .

[0055] 2. Formula and performance index detection

[0056] (1) Test method of chromaticity coordinate and transmittance

[0057] ① The thickness of the glass material to be measured is accurately measured and recorded as "d" with the unit of "mm".

[0058] ② The full-waveband transmittance of the glass material under 190nm-900nm is tested by using a spectrophotometer.

[0059] Among them, the transmittance under 550nm is recorded as the transmittance "T%" of the glass material.

[0060] ③ After processing by using the "color analysis software Color Analysis" of the instrument, the chromaticity coordinate a, b values under the original thickness of the glass material are obtained.

[0061] ④ The a, b values under the original thickness are converted into a*, b* values under the reference thickness of 1.10mm by the following formula:

[0062] a*=a÷d×1.10;b*=b÷d×1.10

[0063] In the formula, a, b are the chromaticity coordinate values a, b measured under the original thickness;

[0064] d is the actual thickness of the glass (mm);

[0065] (2) Formula and detection results

[0066] Table 1

[0067]

[0068] The a*, b* values are filled into the coordinate graph which has been drawn with the chromaticity control area in advance, see Figure 2 ;

[0069] According to Table 1 and Figure 2 It can be seen that the transmittance of the ultra-white amorphous aluminum silicon oxide glass material prepared in the application is greater than or equal to 92%, and the a*, b* values move towards the "white point" "0,0" direction, and are all within the control area constructed by the elliptic equation "(b-0.14)×2 / 0.0016+(a+0.012)×2 / 0.000324=2", and are visually whiter.

[0070] Comparative Examples 1-6:

[0071] According to the preparation method and detection method of the reference examples, preparation and performance index measurement are carried out according to Table 2 below;

[0072] Table 2

[0073]

[0074]

[0075] The a* and b* values are filled into the coordinate graph which has been drawn with the chromaticity control area in advance, see Figure 3 ;

[0076] According to Table 2 and Figure 3 It can be seen that the transmittance of the comparative amorphous aluminum-silicon oxide glass material does not reach 92%, and the a* and b* values are not in the control area constructed by the elliptic equation "(b-0.14) x 2 / 0.0016+(a+0.012) x 2 / 0.000324=2", and the chromaticity and transmittance are poorer than those of the examples of the present application.

[0077] Example 7:

[0078] The super-white amorphous aluminum-silicon oxide glass material is baked at 90°C for 15 min before plating the metal film, and then plasma cleaning is carried out;

[0079] The super-white amorphous aluminum-silicon oxide glass material is placed into a magnetron sputtering film plating device for plating, and the machine line speed is set to 50±5 mm / sec, the vacuum degree is <8.0 x 10 -6 Pa, and an inert gas such as argon, krypton, xenon, etc. is used as the working gas, and the gas flow is 100±10 sccm; first, a first layer of Ti metal film is plated using a Ti target, the sputtering power is 1.5 kW, the sputtering rate is 1.8 nm / s, and the thickness of the obtained first layer of Ti metal film is 5 nm; then, a second layer of Cu metal film is plated using a Cu target, the sputtering power is 7.5 kW, the sputtering rate is 4 nm / s, and the thickness of the obtained second layer of Cu metal film is 30 nm; thus, a super-white amorphous aluminum-silicon oxide glass material plated with a double-layer metal material is obtained.

[0080] The above is merely a specific implementation of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these examples will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other examples without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these examples shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A super-white amorphous aluminum-silicon oxide material, characterized in that, It includes inorganic oxides, Se and / or Nd2O3, and Co2O3; wherein the Se and / or Nd2O3 constitute 0.5-1.5 ppm of the total weight of the ultra-white amorphous aluminum-silicon oxide material, and the Co2O3 constitutes 0.3-0.9 ppm of the total weight of the ultra-white amorphous aluminum-silicon oxide material; the inorganic oxides, by weight percentage, comprise: SiO2 58wt%-62wt% Al2O3 13%wt-15wt% Na2O 13%wt-16wt% K2O4wt%-7wt% MgO 3wt%-4.9wt% ZrO2 0.6wt%-1.2wt% Wherein, the iron in the inorganic oxide, calculated as ferric oxide, has a content less than 120 ppm of the total weight of the ultra-white amorphous aluminum-silicon oxide material; the contents of Se, Nd₂O₃, and Co₂O₃ satisfy the requirements of Formula 1: 0.375≤Co2O3 / (Se+Nd2O3)≤1 Equation 1.

2. The ultra-white amorphous aluminum-silicon oxide material according to claim 1, characterized in that, During the melting process, sulfates and / or nitrates are added to the raw materials to form a mixture, wherein the sulfates include sodium sulfate and / or potassium sulfate, and the nitrates include sodium nitrate and / or potassium nitrate. During melting, these mixtures are converted into volatile gases and the corresponding Na2O and / or K2O.

3. The ultra-white amorphous aluminum-silicon oxide material according to claim 2, characterized in that, The amount of sulfate added is 0.4-1.6 kg per 100 kg of mixture, and the amount of nitrate added is 2.0-4.0 kg per 100 kg of mixture.

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