Microcrystalline glass and preparation method thereof, microcrystalline laminated glass and preparation method and application thereof

Abstract

The present application relates to the technical field of glass, and discloses a microcrystalline glass, a preparation method thereof, a microcrystalline laminated glass, a preparation method and application thereof, the microcrystalline glass contains a crystalline phase, the crystalline phase includes a first main crystal phase and a second main crystal phase, the first main crystal phase is lithium disilicate with an expression formula of Li2Si2O5, and the second main crystal phase is tungsten bronze with an expression formula of M x WO3. The preparation method of the microcrystalline glass provided by the present application has the characteristics that the prepared microcrystalline glass has uniform grain size.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass, in particular to microcrystalline glass and a preparation method thereof, microcrystalline laminated glass and a preparation method and application thereof. BACKGROUND

[0002] As a brand-new communication technology, the commercialization process of 5G promotes the rapid development of automatic driving technology.

[0003] In order to ensure that the vehicle can accurately receive real-time road information, a communication radar system for receiving real-time road information is generally installed in the vehicle. Since the vehicle body material will have an electromagnetic shielding effect on electromagnetic signals, the communication radar system mainly enters the vehicle through the glass window (including the front windshield, rear windshield and sunroof) of the vehicle body when receiving external road information.

[0004] In order to reduce energy consumption, CN114043788A discloses a kind of automobile sunroof laminated glass, uses PVB (polyvinyl butyral) as the laminated glass of cementing layer, introduces Low-E (low emissivity) functional film in laminated glass, reduces the transmittance of visible light through PVB, and at the same time, part of near-infrared is absorbed by PVB and most of near-infrared is reflected by Low-E functional film, to achieve the purpose of good blocking of solar energy into the vehicle.

[0005] However, the Low-E functional film mainly uses metal silver as the film component in the functional layer, which has a strong shielding effect on electromagnetic signals, which is not conducive to the promotion and application of 5G communication technology in vehicles; in addition, the cementing layer of the laminated glass uses dark PVB, which increases the production cost.

[0006] In addition, in order to create a vehicle atmosphere, CN112984479A discloses a combination of atmosphere lamp glass and a processing technology thereof, a method of printing reflective ink on the surface of the laminated glass inside the contact with the cementing layer. The reflective ink can reflect the light introduced from the inside boundary of the laminated glass into the vehicle, thereby creating the effect of atmosphere lamp decoration in the vehicle.

[0007] However, if the reflective ink needs to be printed on the inside of the laminated glass, the formed laminated glass generally needs to be flattened first, and then the printing method is implemented. However, the flattening of the formed laminated glass is easy to cause the breakage of the glass, which increases the production cost. SUMMARY

[0008] The purpose of the present application is to overcome the defects of uneven grain size, low transmittance and high production cost of the microcrystalline laminated glass in the prior art.

[0009] To achieve the above object, the first aspect of the present application provides a microcrystalline glass, which is a lithium-aluminum-boron-silicon glass, and contains a crystalline phase, wherein the average particle size of the crystalline phase is 40-120 nm.

[0010] The crystalline phase includes a first main crystalline phase and a second main crystalline phase, wherein the first main crystalline phase is lithium disilicate with an expression of Li2Si2O5, and the second main crystalline phase is tungsten bronze with an expression of M x WO3, wherein 0

[0011] Preferably, the microcrystalline glass has a transmittance of 5-20% in the visible light region.

[0012] Preferably, the microcrystalline glass has a transmittance of 2-10% in the near-infrared region.

[0013] Preferably, the microcrystalline glass contains 60-75 mol% of SiO2, 4-10 mol% of Al2O3, 4-10 mol% of WO3, 5-10 mol% of Li2O, 0-5 mol% of Na2O, 0-5 mol% of K2O, 3-8 mol% of B2O3, 0-3 mol% of ZrO2, 0-4 mol% of P2O5, and 0-0.5 mol% of SnO2, based on the total molar mass of the microcrystalline glass, and the sum of the contents of Na2O, K2O, ZrO2, P2O5 and SnO2 is 2-7 mol%.

[0014] The second aspect of the present application provides a method for preparing the microcrystalline glass of the first aspect, which comprises:

[0015] (1) subjecting a raw material composition for forming the microcrystalline glass to a melting treatment to obtain a molten glass liquid;

[0016] (2) subjecting the molten glass liquid to a rapid quenching to obtain a molten body I, wherein the rapid quenching is such that the temperature of the molten glass liquid is cooled to 20-40℃ within no more than 5 min;

[0017] (3) subjecting the molten body I to an annealing treatment to obtain a molten body II;

[0018] (4) subjecting the molten body II to a crystallization treatment to obtain the microcrystalline glass.

[0019] Preferably, in step (1), the conditions of the melting treatment include: temperature of 1550-1650℃, time of 5-12h, and heating rate of 5-10℃ / min.

[0020] Preferably, in step (3), the conditions of the annealing treatment include: temperature of 510-630℃, time of 3-7h, and heating rate of 5-10℃ / min.

[0021] Preferably, in step (4), the conditions of the crystallization treatment include: temperature of 750℃-950℃, time of 1-4h, and heating rate of 4-10℃ / min.

[0022] The third aspect of the present application provides a microcrystalline laminated glass, which comprises transparent glass layers, adhesive layers, and microcrystalline glass layers arranged in sequence; the transparent glass layers are selected from at least one of soda-lime silicate glass, aluminum silicate glass, and borosilicate glass; and the microcrystalline glass layers are formed of the microcrystalline glass of the first aspect.

[0023] Preferably, the transmittance of the transparent glass layers in the visible light region is 60-90%.

[0024] Preferably, the adhesive layers are selected from at least one of PVB and EVA.

[0025] Preferably, the thickness of the transparent glass layers is not less than 1.5mm.

[0026] Preferably, the thickness of the adhesive layers is not less than 0.6mm.

[0027] According to a particularly preferred embodiment, the thickness of the microcrystalline glass layers is 0.5-1.0mm.

[0028] The fourth aspect of the present application provides a method for preparing the microcrystalline laminated glass of the third aspect, which comprises: combining the transparent glass layers and the microcrystalline glass layers through the adhesive layers arranged in the middle by using a lamination process.

[0029] The fifth aspect of the present application provides the use of the microcrystalline laminated glass of the third aspect in automobile accessories.

[0030] The microcrystalline glass prepared by the method provided by the present application has the characteristic of uniform grain size.

[0031] In particular, the microcrystalline laminated glass prepared by the method provided by the present application has the characteristics of low production cost and rich automobile interior atmosphere decoration effect. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1This is a schematic diagram of the structure of the microcrystalline sandwich glass prepared in Example 1 of this application.

[0033] Figure 2 This is a schematic diagram of the microcrystalline glass light-emitting system in the microcrystalline laminated glass prepared in Example 1 of this application.

[0034] Explanation of reference numerals in the attached figures

[0035] 11. Transparent glass layer 12. Adhesive layer

[0036] 13. Microcrystalline glass light-emitting system; 21. Light source I

[0037] 22. Light Source II 23. Inner Surface of Microcrystalline Glass

[0038] 24. Microcrystalline glass phase Detailed Implementation

[0039] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0040] In this invention, unless otherwise stated, room temperature or normal temperature refers to 25±2℃.

[0041] As mentioned above, the first aspect of the present invention provides a microcrystalline glass, which is lithium aluminum borosilicate glass, wherein the microcrystalline glass contains a crystalline phase and the average particle size of the crystalline phase is 40nm-120nm.

[0042] The crystalline phase includes a first main crystalline phase and a second main crystalline phase. The first main crystalline phase is lithium disilicate having the expression shown in Li2Si2O5. The second main crystalline phase is lithium disilicate having M... x The tungsten bronze shown in WO3, wherein 0 < x < 1, and M is selected from at least one of Li, Na, and K; based on the total weight of the microcrystalline glass, the content of the first main crystalline phase is 30wt%-45wt%, and the content of the second main crystalline phase is 15wt%-30wt%.

[0043] Preferably, the average particle size of the crystalline phase is 70-100 nm.

[0044] More preferably, the glass-ceramic further comprises a glass phase, wherein the content of the first main crystal phase is 30wt%-45wt%, the content of the second main crystal phase is 15wt%-30wt%, and the content of the glass phase is 30wt%-50wt%, based on the total weight of the glass-ceramic.

[0045] Preferably, the transmittance of the glass-ceramic in the visible light region is 5%-20%.

[0046] Preferably, the transmittance of the glass-ceramic in the near-infrared region is 2%-10%.

[0047] Preferably, the glass-ceramic comprises 60-75mol% of SiO2, 4-10mol% of Al2O3, 4-10mol% of WO3, 5-10mol% of Li2O, 0-5mol% of Na2O, 0-5mol% of K2O, 3-8mol% of B2O3, 0-3mol% of ZrO2, 0-4mol% of P2O5, and 0-0.5mol% of SnO2, based on the total molar mass of the glass-ceramic; and the sum of the contents of Na2O, K2O, ZrO2, P2O5 and SnO2 is 2-7mol%.

[0048] According to a particularly preferred embodiment, the glass-ceramic comprises 65-75mol% of SiO2, 4-8mol% of Al2O3, 4-6mol% of WO3, 6-10mol% of Li2O, 0-3mol% of Na2O, 0-2mol% of K2O, 6-8mol% of B2O3, 0-1.7mol% of ZrO2, 0-1mol% of P2O5, and 0-0.3mol% of SnO2, based on the total molar mass of the glass-ceramic; and the sum of the contents of Na2O, K2O, ZrO2, P2O5 and SnO2 is 3-6mol%.

[0049] As described above, the second aspect of the present application provides a method for preparing the glass-ceramic of the first aspect, which comprises:

[0050] (1) subjecting a raw material composition for forming the glass-ceramic to a melting treatment to obtain a molten glass liquid;

[0051] (2) subjecting the molten glass liquid to a rapid quenching to obtain a molten body I; the rapid quenching is such that the temperature of the molten glass liquid is cooled to 20-40℃ within no more than 5min;

[0052] (3) subjecting the molten body I to an annealing treatment to obtain a molten body II;

[0053] (4) subjecting the melt II to a crystallization treatment to obtain the glass-ceramics.

[0054] According to a particularly preferred embodiment, in step (1), the method further comprises: weighing the raw material composition for forming the glass-ceramics, stirring the raw material composition at a speed of 200-400 rpm for 30-60 min to obtain a mixture, introducing the mixture into a crucible, and placing the crucible in a heating furnace I for a melting treatment to obtain a molten glass liquid.

[0055] Preferably, in step (1), the melting treatment is performed at a temperature of 1550-1650 ℃, a time of 5-12 h, and a temperature increasing rate of 5-10 ℃ / min.

[0056] Preferably, in step (2), the forming is achieved by pouring the molten glass liquid into a mold for the rapid quenching.

[0057] According to a particularly preferred embodiment, in step (3), the method further comprises: placing the melt I in an annealing furnace for an annealing treatment to obtain a melt II.

[0058] Preferably, in step (3), the annealing treatment is performed at a temperature of 510-630 ℃, a time of 3-7 h, and a temperature increasing rate of 5-10 ℃ / min.

[0059] According to a particularly preferred embodiment, in step (4), the method further comprises: before the crystallization treatment, subjecting the melt II to a grinding and polishing treatment to obtain a base glass I with a thickness of 0.5-1.0 mm, placing the base glass I in a heating furnace II for a crystallization treatment, and placing the material obtained by the crystallization treatment in a muffle furnace for cooling to 20-40 ℃, washing the residues on the surface of the glass with water to obtain the glass-ceramics.

[0060] The present application does not have specific requirements for the specific process and specific equipment of the grinding and polishing treatment, and those skilled in the art can perform the grinding and polishing treatment in combination with the grinding and polishing treatment known in the art, which will not be described in detail herein, and those skilled in the art should not understand it as a limitation on the present application.

[0061] Preferably, in step (4), the crystallization treatment is performed at a temperature of 750-950 ℃, a time of 1-4 h, and a temperature increasing rate of 4-10 ℃ / min.

[0062] In the present application, the time of the melting treatment refers to the time required for the reaction temperature to reach the target temperature and remain at the target temperature, that is, the time of the melting treatment is counted from the moment when the reaction temperature reaches the target temperature, and the time of the annealing treatment and the crystallization treatment are also counted in this way, which will not be repeated here.

[0063] As described above, the third aspect of the present application provides a microcrystalline laminated glass, which comprises transparent glass layers, adhesive layers, and microcrystalline glass layers arranged in sequence; the transparent glass layers are selected from at least one of soda-lime silicate glass, aluminum silicate glass, and borosilicate glass, and the microcrystalline glass layers are formed of the microcrystalline glass of the first aspect.

[0064] Preferably, the transparent glass layer is soda-lime silicate glass. More preferably, the transparent glass layer is white glass.

[0065] Preferably, the transmittance of the transparent glass layer in the visible light region is 60-90%.

[0066] Preferably, the thickness of the transparent glass layer is not less than 1.5 mm. More preferably, the thickness of the transparent glass layer is 1.5-3.0 mm.

[0067] Preferably, the adhesive layer is selected from at least one of polyvinyl butyral (PVB) and ethylene-vinyl acetate copolymer (EVA).

[0068] Preferably, the thickness of the adhesive layer is not less than 0.6 mm. More preferably, the thickness of the adhesive layer is 0.6-1.0 mm.

[0069] Preferably, the thickness of the microcrystalline glass layer is 0.5-1.0 mm.

[0070] As described above, the fourth aspect of the present application provides a method for preparing the microcrystalline laminated glass of the third aspect, which comprises: combining the transparent glass layer and the microcrystalline glass layer through the adhesive layer arranged in the middle by using a lamination process.

[0071] Preferably, the operation of the lamination process comprises: first combining the transparent glass layer and the microcrystalline glass layer through the adhesive layer arranged in the middle to obtain a base glass II, and then performing vacuum high-pressure heating treatment on the base glass II to obtain a microcrystalline laminated glass precursor.

[0072] Preferably, the conditions of the vacuum high-pressure heating treatment at least satisfy: the temperature is 120-150℃, the time is 1.5-3h, the pressure is 1.0-1.5MPa, and the vacuum degree is -0.5MPa to -1.0MPa.

[0073] According to a particularly preferred embodiment, the method further comprises: after obtaining the microcrystalline laminated glass precursor, installing the light source I and the light source II on the side edge I and the side edge II of the microcrystalline glass layer in the microcrystalline laminated glass precursor. The inventors have found in the course of their investigations that the use of this preferred embodiment reduces the path distance of the light source through the microcrystalline glass layer, so that the microcrystalline glass layer has a uniform appearance effect of light emission.

[0074] Preferably, the microcrystalline laminated glass precursor has a rectangular shape, and the side edge I and the side edge II are long edges in the microcrystalline laminated glass precursor.

[0075] Preferably, the light source I and the light source II are each independently selected from LED light strips with an adhesive layer.

[0076] More preferably, the thickness of the light source I and the light source II is not greater than 1.0 mm.

[0077] As described above, the fifth aspect of the present application provides the use of the microcrystalline laminated glass of the third aspect in automobile accessories.

[0078] The present application will be described in detail below by way of examples. In the following examples, the raw materials used are commercially available unless otherwise specified.

[0079] Transparent glass layer: white glass, with a transmittance of 90% in the visible light region, purchased from Xinyi Glass Holdings Limited;

[0080] Adhesive layer: polyvinyl butyral (PVB), with a brand name of BX-1, purchased from Jishui (Shanghai) International Trading Co., Ltd.;

[0081] Light source I: LED light strip, with a brand name of "335 60 lamp side light soft light bar, 12V", purchased from Shenzhen Jiawei Xin Technology Co., Ltd.;

[0082] Light source II: LED light strip, with a brand name of "335 60 lamp side light soft light bar, 12V", purchased from Shenzhen Jiawei Xin Technology Co., Ltd.;

[0083] In the following examples, the total amount of the raw material composition used to form the microcrystalline glass is 10 mol.

[0084] Preparation Example 1

[0085] The present preparation example provides a method for preparing a microcrystalline glass, which comprises:

[0086] A1: A raw material composition for forming a microcrystalline glass was weighed according to Table 1, and stirred at a speed of 200 rpm for 60 min to obtain a mixture. The mixture was introduced into a crucible, and the crucible was placed in a heating furnace I at 1650°C for a melting treatment to obtain a molten glass liquid;

[0087] A2: The molten glass liquid was poured into a mold for forming, so that the temperature of the molten glass liquid was cooled to 30°C within 4 min to obtain a melt I;

[0088] A3: The melt I was placed in an annealing furnace at 530°C for an annealing treatment to obtain a melt II;

[0089] A4: The melt II was cooled to room temperature, and subjected to grinding and polishing to obtain a base glass I with a thickness of 0.7 mm. The base glass I was placed in a heating furnace II at 862°C for a crystallization treatment. The material obtained by the crystallization treatment was cooled to room temperature in a muffle furnace, and the residues on the surface of the glass were washed with water to obtain a microcrystalline glass with a thickness of 0.7 mm.

[0090] In the absence of a special description, the remaining preparation examples or comparative preparation examples were prepared by using the same process as Preparation Example 1, except that the components of the microcrystalline glass composition and the process conditions for preparing the microcrystalline glass were different. See Tables 1 and 2 for details.

[0091] Table 1

[0092]

[0093]

[0094] Table 2

[0095]

[0096]

[0097] Embodiment

[0098] The embodiment provides a method for preparing a microcrystalline laminated glass, which comprises:

[0099] S1: Respectively, a transparent glass layer and each microcrystalline glass layer from the aforementioned preparation examples were combined by a bonding layer arranged in the middle to obtain a base glass II;

[0100] The thickness of the transparent glass layer is 2.1 mm, and the thickness of the bonding layer is 0.76 mm.

[0101] S2: performing vacuum high-pressure heating treatment on the base glass II to obtain a microcrystalline interlayer glass precursor;

[0102] The vacuum high-pressure heating treatment has a temperature of 142 DEG C, a time of 2h, a pressure of 1.2MPa, and a vacuum degree of -0.75MPa.

[0103] S3: installing light source I and light source II on the side edge I and the side edge II of the microcrystalline glass layer in the microcrystalline interlayer glass precursor to obtain a microcrystalline interlayer glass.

[0104] The thickness of the light source I is 0.8mm, and the thickness of the light source II is 0.8mm.

[0105] Specifically, the details and results in the examples are listed in Table 3.

[0106] Table 3

[0107] Microcrystalline glass layer designation Microcrystalline glass interlayer designation Color of the interlayer microcrystalline glass M1 N1 Dark blue M2 N2 Dark blue M3 N3 Dark blue-gray M4 N4 Dark blue-gray M5 N5 Violet-gray M6 N6 Dark blue-gray DM1 DN1 Colorless transparent DM2 DN2 Dark blue DM3 DN3 Violet-gray

[0108] Test Example

[0109] The microcrystalline glass and the interlayer microcrystalline glass prepared in the examples are respectively subjected to various performance tests, and the specific test results are shown in Table 4.

[0110] Crystal phase: analyzed by an XRD diffractometer, 2Theta = 10-80°, step length 0.02, and the equipment used in the examples is Shimadzu XRD-6000.

[0111] Grain size: measured by a SEM scanning electron microscope, the transparent microcrystalline glass is subjected to surface treatment in HF acid, then gold spraying is performed on the surface of the transparent microcrystalline glass, and surface scanning is performed under the SEM scanning electron microscope to determine the size of the crystal grains.

[0112] Visible light transmittance and near-infrared transmittance: tested by an ultraviolet-visible-near-infrared spectrophotometer, the glass sample is prepared below 1mm, and the equipment used in the examples is Agilent CARRY5000.

[0113] Fracture toughness: a method for measuring indentation crack size is used, the sample specification is 50mmx50mmx0.7mm, and the sample is chamfered, ground and polished, after the sample preparation, a Vickers hardness indenter is used to apply a force of 300N on the sample for 30s, and then the fracture strength is calculated.

[0114] Table 4

[0115]

[0116]

[0117] The results above show that the microcrystalline glass prepared by the method provided by the present invention has a good effect on blocking near-infrared light in the near-infrared region, and also has good fracture toughness.

[0118] Meanwhile, the microcrystalline laminated glass prepared by the method provided by this invention can enrich the interior decoration effect of automobiles and play an energy-saving role.

[0119] The present invention provides, by way of example, a schematic diagram of the structure of the microcrystalline sandwich glass prepared in Example 1, and a schematic diagram of the microcrystalline glass light-emitting system in the microcrystalline sandwich glass prepared in Example 1.

[0120] in, Figure 1 This is a schematic diagram of the structure of the microcrystalline sandwich glass prepared in Example 1. Figure 1 As can be seen from the above, the microcrystalline laminated glass prepared by the present invention consists of a transparent glass layer, an adhesive layer, a microcrystalline glass layer, and light sources installed on both sides of the microcrystalline glass layer in the order from top to bottom.

[0121] Figure 2 This is a schematic diagram of the glass-ceramic light-emitting system in the glass-ceramic laminated glass prepared in Example 1. Figure 2 As can be seen, when the LED light strip on the side of the microcrystalline glass layer emits light, the emitted light can be introduced into the microcrystalline glass layer through the side of the microcrystalline glass layer. Through the reflection of the crystalline phase in the microcrystalline glass layer, the light can be exported from the surface of the microcrystalline glass layer, enriching the decorative effect of the car interior.

[0122] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A microcrystalline glass, characterized in that, The microcrystalline glass is lithium aluminum borosilicate glass, and the microcrystalline glass contains a crystalline phase with an average particle size of 40nm-120nm. The crystalline phase includes a first main crystalline phase and a second main crystalline phase. The first main crystalline phase is lithium disilicate having the expression shown in Li2Si2O5. The second main crystalline phase is lithium disilicate having M... x The tungsten bronze as shown in WO3, wherein 0 < x < 1, and M is selected from at least one of Li, Na, and K; based on the total weight of the microcrystalline glass, the content of the first main crystalline phase is 30wt%-45wt%, and the content of the second main crystalline phase is 15wt%-30wt%; Based on the total molar mass of the glass-ceramic, the glass-ceramic contains 65-75 mol% SiO2, 4-8 mol% Al2O3, 4-6 mol% WO3, 6-10 mol% Li2O, 0-3 mol% Na2O, 0-2 mol% K2O, 6-8 mol% B2O3, 0-1.7 mol% ZrO2, 0-1 mol% P2O5, and 0-0.3 mol% SnO2; and the sum of the contents of Na2O, K2O, ZrO2, P2O5, and SnO2 is 3-6 mol.

2. The microcrystalline glass according to claim 1, characterized in that, The microcrystalline glass has a transmittance of 5%-20% in the visible light region; and / or The transmittance of the microcrystalline glass in the near-infrared region is 2%-10%.

3. A method for preparing the microcrystalline glass according to claim 1 or 2, characterized in that, The method includes: (1) The raw material composition used to form glass-ceramics is melted to obtain molten glass liquid; (2) The molten glass is rapidly cooled to form a molten body I; the rapid cooling method cools the temperature of the molten glass to 20-40°C within 5 minutes. (3) Anneal the melt I to obtain melt II; (4) The melt II is crystallized to obtain the microcrystalline glass.

4. The method according to claim 3, characterized in that, In step (1), the conditions for the melting treatment include: a temperature of 1550-1650℃, a time of 5-12h, and a heating rate of 5-10℃ / min; and / or In step (3), the annealing conditions include: a temperature of 510-630℃, a time of 3-7h, and a heating rate of 5-10℃ / min; and / or In step (4), the conditions for the crystallization treatment include: a temperature of 750℃-950℃, a time of 1-4h, and a heating rate of 4-10℃ / min.

5. A microcrystalline laminated glass, characterized in that, The microcrystalline laminated glass comprises a transparent glass layer, an adhesive layer, and a microcrystalline glass layer stacked sequentially; the transparent glass layer is selected from at least one of sodium-calcium silicate glass, aluminosilicate glass, and borosilicate glass, and the microcrystalline glass layer is formed from the microcrystalline glass as described in claim 1 or 2.

6. The microcrystalline laminated glass according to claim 5, characterized in that, The transparent glass layer has a transmittance of 60-90% in the visible light region; and / or The adhesive layer is selected from at least one of polyvinyl butyral and ethylene-vinyl acetate copolymer.

7. The microcrystalline laminated glass according to claim 5 or 6, characterized in that, The thickness of the transparent glass layer is not less than 1.5 mm; and / or The thickness of the adhesive layer is not less than 0.6 mm; and / or The thickness of the microcrystalline glass layer is 0.5-1.0 mm.

8. A method for preparing the microcrystalline laminated glass according to any one of claims 5-7, characterized in that, The method includes: using a lamination process to bond a transparent glass layer and a microcrystalline glass layer together through an adhesive layer disposed in the middle.

9. The application of the microcrystalline laminated glass according to any one of claims 5-7 in automotive parts.

Images