A glass with improved toughness and its preparation method

Abstract

The present invention discloses a glass with improved toughness and a method for preparing the same, in the field of layered material technology. The method comprises providing a first glass substrate and a second glass substrate; providing a composite reinforcement layer material, wherein the composite reinforcement layer material comprises a first stainless steel fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer, and a second stainless steel fiber layer stacked in sequence; stacking the first glass substrate, the composite reinforcement layer material, and the second glass substrate in sequence to obtain a laminate; placing the laminate into a mold and subjecting the laminate to a hot pressing fusion process to obtain glass, wherein the hot pressing fusion process comprises two hot pressing fusion stages. The glass of the present invention has high flexural strength, and the flexural strength remains substantially unchanged at high temperatures. Furthermore, the glass of the present invention has a simple structure, a simple preparation process, and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of layered materials, and in particular to a glass with improved toughness and a preparation method thereof. Background Art

[0002] A large number of glassware are required in chemical experiments, but since glass is a brittle material, improving the toughness of glass is an important way to increase the service life of glassware.

[0003] Our company's previously authorized patent CN111572132B proposes a high-strength glass for laboratory glassware. However, during the manufacture and use of this patented product, our researchers discovered the following problems: This glass is an anisotropic material, meaning that when stress is applied to its two surfaces, the mechanical properties of the glass differ. In other words, when stress is applied to one surface, the glass has high strength, while when stress is applied to the other surface, the glass has low strength. This results in users often mistakenly applying stress to the weaker side when using flat glass products, resulting in glass breakage. Furthermore, this glass has limitations on the thickness relationship between the glass substrate, the thin glass layer, and the various fiber layers, which significantly increases the cost of glass manufacturing. Furthermore, our research has found that the flexural strength of this glass degrades significantly under high-temperature conditions, making it unsuitable for high-temperature chemical experiments. Summary of the Invention

[0004] The present invention provides glass with improved toughness and a method for its preparation. By combining stainless steel fiber with glass fiber, the present invention significantly simplifies the layer structure compared to existing technologies. The thickness relationship between the various layers of the glass is also greatly simplified, thereby reducing production costs. Furthermore, the present invention utilizes an improved two-stage hot pressing fusion process, significantly reducing production costs and improving production efficiency. Finally, the glass produced by the present invention exhibits significantly reduced degradation of mechanical properties at high temperatures.

[0005] The present invention provides a glass with improved toughness, characterized in that the glass is prepared by the following method:

[0006] providing a first glass substrate and a second glass substrate;

[0007] Providing a composite reinforcement layer material, wherein the composite reinforcement layer material comprises a first stainless steel fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer, and a second stainless steel fiber layer stacked in sequence;

[0008] stacking a first glass substrate, a composite reinforcement layer material, and a second glass substrate in sequence to obtain a laminate;

[0009] The laminate is placed in a mold and subjected to a hot pressing fusion process to obtain glass, wherein the hot pressing fusion process has two hot pressing fusion stages.

[0010] In a preferred embodiment, the first stainless steel fiber layer, the first thin glass layer, the glass fiber layer, the second thin glass layer, and the second stainless steel fiber layer have the same thickness.

[0011] In a preferred embodiment, the first glass substrate and the second glass substrate have the same thickness.

[0012] In a preferred embodiment, the hot pressing fusion treatment is carried out in an argon atmosphere, and the hot pressing fusion treatment has a first hot pressing fusion treatment stage and a second hot pressing fusion treatment stage, wherein the temperature of the first hot pressing fusion treatment stage is 700-800°C, the holding time is 10-20min, and the pressure is 15-25MPa, and the temperature of the second hot pressing fusion treatment stage is 910-930°C, the holding time is 10-20min, and the pressure is 25-30MPa.

[0013] In a preferred embodiment, the total weight of the first glass substrate and the second glass substrate is a first weight, and the total weight of the first stainless steel fiber layer, the glass fiber layer, and the second stainless steel fiber layer is a second weight, wherein the ratio of the first weight to the second weight is (15-20):1.

[0014] The present invention provides a method for preparing glass with improved toughness, characterized in that the method comprises:

[0015] providing a first glass substrate and a second glass substrate;

[0016] Providing a composite reinforcement layer material, wherein the composite reinforcement layer material comprises a first stainless steel fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer, and a second stainless steel fiber layer stacked in sequence;

[0017] stacking a first glass substrate, a composite reinforcement layer material, and a second glass substrate in sequence to obtain a laminate;

[0018] The laminate is placed in a mold and subjected to a hot pressing fusion process to obtain glass, wherein the hot pressing fusion process has two hot pressing fusion stages.

[0019] In a preferred embodiment, the first stainless steel fiber layer, the first thin glass layer, the glass fiber layer, the second thin glass layer, and the second stainless steel fiber layer have the same thickness.

[0020] In a preferred embodiment, the first glass substrate and the second glass substrate have the same thickness.

[0021] In a preferred embodiment, the hot pressing fusion treatment is carried out in an argon atmosphere, and the hot pressing fusion treatment has a first hot pressing fusion treatment stage and a second hot pressing fusion treatment stage, wherein the temperature of the first hot pressing fusion treatment stage is 700-800°C, the holding time is 10-20min, and the pressure is 15-25MPa, and the temperature of the second hot pressing fusion treatment stage is 910-930°C, the holding time is 10-20min, and the pressure is 25-30MPa.

[0022] In a preferred embodiment, the total weight of the first glass substrate and the second glass substrate is a first weight, and the total weight of the first stainless steel fiber layer, the glass fiber layer, and the second stainless steel fiber layer is a second weight, wherein the ratio of the first weight to the second weight is (15-20):1.

[0023] Compared to the prior art, the present invention offers the following advantages: It provides glass with improved toughness and a method for its preparation. The combined use of stainless steel fiber and glass fiber significantly simplifies the layer structure compared to the prior art. The thickness relationship between the various layers of the glass is also greatly simplified, reducing production costs. Furthermore, the present invention utilizes an improved two-stage hot-pressing fusion process, significantly reducing production costs and improving production efficiency. Finally, the mechanical property degradation of the glass produced by the present invention at high temperatures is significantly slowed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the glass layer structure of an embodiment of the present invention.

[0025] Figure 2 It is a method flow chart of an embodiment of the present invention.

[0026] Figure 3 is a graph showing the change in flexural strength of glass prepared according to one embodiment as a function of temperature.

[0027] Figure 4 is a graph showing how the flexural strength of glass prepared according to another embodiment varies with temperature.

[0028] Figure 5 is a graph showing the change in flexural strength of glass prepared according to a comparative example with temperature.

[0029] Figure 6 is a graph showing changes in flexural strength of glass prepared according to another comparative example as a function of temperature. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0031] Figure 1 FIG. 1 is a schematic diagram of the glass layer structure of an embodiment of the present invention. Figure 1 As shown, the glass of the present invention comprises, from top to bottom, a first glass substrate, a first stainless steel fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer, a second stainless steel fiber layer, and a second glass substrate. Unlike the prior art CN111572132B, the mechanical properties of the upper and lower surfaces of the glass of the present invention are consistent. Therefore, during use, the first glass substrate can face outward (in the present invention, if the glass is formed into a container for a solution, the direction of contact with air is the outside; if the glass is formed into a flat shape, the force-bearing surface of the glass is the outside), or the second glass substrate can face outward. In contrast, the prior art CN111572132B requires that the first glass substrate face outward and the third glass substrate face inward.

[0032] It should be noted in advance that, due to the inconsistent requirements of various laboratory vessels for glass thickness (some vessels require the glass thickness to be very thin, some vessels may require the glass thickness to reach 1 cm or even larger, and some laboratories also require the purchase of glass stirring rods, etc.), in order to cover these thickness ranges, this application does not specifically limit the glass thickness, and the specific thickness of the glass needs to be adjusted according to customer requirements. Of course, the method of this application is generally suitable for producing glass vessels with relatively thick thickness, so that the characteristics of this application can be fully utilized. The method of this application has no special requirements for the glass composition, and it can be considered that the glass material used in this application is the common glass material of ordinary laboratory glassware. For the comparability of the results, the examples and comparative examples of this application are all tested using the glass composition marked in Section 3.1 AS1 of Chapter 3 of the reference ("Structure and Performance Research of High Strength and High Modulus Glass", Ye Shiqian, Wuhan University of Technology Thesis), and the glass can be purchased directly from the Wuhan University of Technology Laboratory. The flexural strength test method of the present invention is based on the reference ("Structure and Performance Research of High Strength and High Modulus Glass", Ye Shiqian, Wuhan University of Technology Thesis). The alkali-free glass fiber used in the present invention was purchased from Toray Industries, Japan, and the stainless steel fiber was purchased from Fujian Qianglun New Materials Co., Ltd.

[0033] Figure 2 1 is a flow chart of a method according to an embodiment of the present invention. As shown in the figure, the method according to the present invention includes the following steps:

[0034] Step 1: providing a first glass substrate and a second glass substrate;

[0035] Step 2: providing a composite reinforcement layer material, wherein the composite reinforcement layer material comprises a first stainless steel fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer, and a second stainless steel fiber layer stacked in sequence;

[0036] Step 3: stacking the first glass substrate, the composite reinforcement layer material, and the second glass substrate in sequence to obtain a laminate;

[0037] Step 4: placing the laminate into a mold and subjecting the laminate to a hot pressing fusion process to obtain glass, wherein the hot pressing fusion process has two hot pressing fusion stages.

[0038] Example 1

[0039] The glass is prepared by the following steps: providing a first glass substrate and a second glass substrate; providing a composite reinforcement layer material, wherein the composite reinforcement layer material includes a first stainless steel fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer and a second stainless steel fiber layer stacked in sequence; stacking the first glass substrate, the composite reinforcement layer material and the second glass substrate in sequence to obtain a laminate; placing the laminate into a mold and performing a hot pressing fusion treatment on the laminate to obtain glass, wherein the hot pressing fusion has two hot pressing fusion stages.

[0040] The first stainless steel fiber layer, the first thin glass layer, the glass fiber layer, the second thin glass layer, and the second stainless steel fiber layer have the same thickness.

[0041] The first glass substrate and the second glass substrate have the same thickness.

[0042] The hot pressing fusion treatment is carried out in an argon atmosphere. The hot pressing fusion treatment includes a first hot pressing fusion treatment stage and a second hot pressing fusion treatment stage. The temperature of the first hot pressing fusion treatment stage is 700°C, the holding time is 10 minutes, and the pressure is 15 MPa. The temperature of the second hot pressing fusion treatment stage is 910°C, the holding time is 10 minutes, and the pressure is 25 MPa.

[0043] The total weight of the first glass substrate and the second glass substrate is a first weight, and the total weight of the first stainless steel fiber layer, the glass fiber layer, and the second stainless steel fiber layer is a second weight, wherein the ratio of the first weight to the second weight is 15:1. At room temperature, the flexural strength of Example 1 is 210 MPa, which is about 5% higher than that of the prior art CN111572132B. At the same time, the layer structure of the present invention is simpler than that of the prior art, and there is no strict and complex matching relationship between the thicknesses of the layers, which greatly reduces the manufacturing cost of the glass of the present invention. In addition, the special layer composition and layer structure of the present invention enable the present invention to adopt a two-stage short-time hot pressing fusion process, which greatly improves the production efficiency of the glass of the present invention. A possible explanation for this result is that during the process of hot pressing and fusion to form the product, since stainless steel fiber and glass fiber are fibers of different compositions (stainless steel fiber is metal fiber, glass fiber is inorganic non-metallic fiber), the two have different wettability to the glass melt. After simulation by our researchers, stainless steel fiber has better wettability to the glass melt, so the stainless steel fiber will attract the surrounding glass melt to form a strong contact interface with it. This phenomenon indirectly leads to a reduction in the glass melt near the glass fiber, which in turn solves the problem of a large amount of glass melt accumulating around the glass fiber (a large amount of glass melt accumulates around the glass fiber during the hot pressing and fusion stage, causing problems such as pores and defects, and melt accumulation requires the hot pressing and fusion process to be extended). In short, the present invention forms a "gradient infiltration" effect between the two fibers through layer structure design, which enables one fiber to quickly form a strong contact interface with the melt, and the other fiber, with the help of the former fiber, can form a strong contact interface with the melt at a slower rate, which avoids the problem of melt accumulation, thereby avoiding problems such as pores and defects. See the graph of the flexural strength of the glass prepared in Example 1 as a function of temperature for details. Figure 3 .like Figure 3 As shown, the flexural strength of the glass of the present invention remains nearly constant below 260°C. Only at temperatures above 260°C does the flexural strength drop significantly, making the glass of the present invention more suitable for high-temperature chemical experiments. This result may be due to the following: The interface between the glass fiber and the glass first slips at high temperatures. However, this slip is an endothermic reaction, so the interfacial slip between the glass fiber and the glass absorbs nearby energy. This, in turn, results in insufficient driving force for interfacial slip between the stainless steel fiber and the glass. This slows interfacial slip between the stainless steel fiber and the glass, thereby maintaining the flexural strength of the glass.

[0044] Example 2

[0045] The glass is prepared by the following steps: providing a first glass substrate and a second glass substrate; providing a composite reinforcement layer material, wherein the composite reinforcement layer material includes a first stainless steel fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer and a second stainless steel fiber layer stacked in sequence; stacking the first glass substrate, the composite reinforcement layer material and the second glass substrate in sequence to obtain a laminate; placing the laminate into a mold and performing a hot pressing fusion treatment on the laminate to obtain glass, wherein the hot pressing fusion has two hot pressing fusion stages.

[0046] The first stainless steel fiber layer, the first thin glass layer, the glass fiber layer, the second thin glass layer, and the second stainless steel fiber layer have the same thickness.

[0047] The first glass substrate and the second glass substrate have the same thickness.

[0048] The hot pressing fusion treatment is carried out in an argon atmosphere. The hot pressing fusion treatment includes a first hot pressing fusion treatment stage and a second hot pressing fusion treatment stage. The temperature of the first hot pressing fusion treatment stage is 800°C, the holding time is 20 minutes, and the pressure is 25 MPa. The temperature of the second hot pressing fusion treatment stage is 930°C, the holding time is 20 minutes, and the pressure is 30 MPa.

[0049] The total weight of the first glass substrate and the second glass substrate is a first weight, and the total weight of the first stainless steel fiber layer, the glass fiber layer, and the second stainless steel fiber layer is a second weight, wherein the ratio of the first weight to the second weight is 20:1. At room temperature, the flexural strength of Example 2 is 215 MPa. For a graph showing the change in flexural strength of the glass prepared in Example 2 with temperature, see Figure 4 .like Figure 4 As shown, the flexural strength of the glass of the present invention remains almost unchanged below 260°C, and the flexural strength decreases significantly only when the temperature is higher than 260°C. The glass of the present invention is more suitable for applications in high-temperature chemical experiments.

[0050] Example 3

[0051] The glass is prepared by the following steps: providing a first glass substrate and a second glass substrate; providing a composite reinforcement layer material, wherein the composite reinforcement layer material includes a first stainless steel fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer and a second stainless steel fiber layer stacked in sequence; stacking the first glass substrate, the composite reinforcement layer material and the second glass substrate in sequence to obtain a laminate; placing the laminate into a mold and performing a hot pressing fusion treatment on the laminate to obtain glass, wherein the hot pressing fusion has two hot pressing fusion stages.

[0052] The first stainless steel fiber layer, the first thin glass layer, the glass fiber layer, the second thin glass layer, and the second stainless steel fiber layer have the same thickness.

[0053] The first glass substrate and the second glass substrate have the same thickness.

[0054] The hot pressing fusion treatment is carried out in an argon atmosphere. The hot pressing fusion treatment includes a first hot pressing fusion treatment stage and a second hot pressing fusion treatment stage. The temperature of the first hot pressing fusion treatment stage is 750°C, the holding time is 15 minutes, and the pressure is 20 MPa. The temperature of the second hot pressing fusion treatment stage is 920°C, the holding time is 15 minutes, and the pressure is 28 MPa.

[0055] The total weight of the first glass substrate and the second glass substrate is a first weight, and the total weight of the first stainless steel fiber layer, the glass fiber layer, and the second stainless steel fiber layer is a second weight. The ratio of the first weight to the second weight is 18:1. At room temperature, the flexural strength of Example 3 is 212 MPa.

[0056] Comparative Example 1

[0057] Comparative Example 1 is Example 3 of the prior art CN111572132B. The graph showing the flexural strength of the glass prepared in Comparative Example 1 as a function of temperature is shown in FIG. Figure 5 .like Figure 5 As shown, the flexural strength of the glass of Comparative Example 1 begins to decrease rapidly above 200 degrees Celsius, which makes the glass of Comparative Example 1 unsuitable for high-temperature chemical experiments.

[0058] Comparative Example 2

[0059] The composite reinforcement layer material includes a first glass fiber layer, a first thin glass layer, a second glass fiber layer, a second thin glass layer, and a third glass fiber layer stacked in sequence. The remaining parameters, processes, and conditions are the same as those in Example 1. At room temperature, the flexural strength of Comparative Example 2 is 160 MPa.

[0060] Comparative Example 3

[0061] The composite reinforcement layer material includes a first stainless steel fiber layer, a first thin glass layer, a second stainless steel fiber layer, a second thin glass layer, and a third stainless steel fiber layer stacked in sequence. The remaining parameters, processes, and conditions are the same as those in Example 1. At room temperature, the flexural strength of Comparative Example 3 is 180 MPa. A graph showing the flexural strength of the glass prepared in Comparative Example 3 as a function of temperature is shown in FIG. Figure 6 .like Figure 6 As shown, the flexural strength of the glass of Comparative Example 3 decreases rapidly above 200 degrees Celsius.

[0062] Comparative Example 4

[0063] The composite reinforcement layer material includes a first copper fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer, and a second copper fiber layer stacked in sequence. The remaining parameters, processes, and conditions are the same as those in Example 1. At room temperature, the flexural strength of Comparative Example 4 is 190 MPa. The reason for the poor performance of Comparative Example 4 is that the difference in the wettability of the two fibers for glass should be within an appropriate range. Too small or too large a difference in wettability can affect the "gradient wettability" effect. Therefore, the mechanical properties of Comparative Example 4 are lower than those of Examples 1-3.

[0064] Comparative Example 5

[0065] The thickness of the first glass substrate is 10-20% greater than that of the second glass substrate. The remaining parameters, processes, and conditions are the same as those of Example 1. At room temperature, the flexural strength of Comparative Example 5 is 208 MPa.

[0066] Comparative Example 6

[0067] The hot pressing fusion process was carried out in an argon atmosphere and consisted of a first and a second hot pressing fusion process. The first hot pressing fusion process was performed at a temperature of 750°C, a holding time of 2 hours, and a pressure of 20 MPa. The second hot pressing fusion process was performed at a temperature of 920°C, a holding time of 2 hours, and a pressure of 28 MPa. The remaining parameters, processes, and conditions were the same as those in Example 1. At room temperature, the flexural strength of Comparative Example 6 was 167 MPa.

[0068] It should be understood that the above-described specific embodiments of the present invention are merely illustrative or illustrative of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the scope of protection of the present invention. In addition, the appended claims are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A glass with improved toughness, characterized in that: The glass is prepared by the following method: providing a first glass substrate and a second glass substrate; Providing a composite reinforcement layer material, wherein the composite reinforcement layer material comprises a first stainless steel fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer, and a second stainless steel fiber layer stacked in sequence; stacking the first glass substrate, the composite reinforcement layer material, and the second glass substrate in sequence to obtain a laminate; The laminate is placed in a mold and subjected to a hot pressing fusion process to obtain the glass, wherein the hot pressing fusion process has two hot pressing fusion stages. The hot pressing and fusion treatment is carried out in an argon atmosphere, and the hot pressing and fusion treatment has a first hot pressing and fusion treatment stage and a second hot pressing and fusion treatment stage, wherein the temperature of the first hot pressing and fusion treatment stage is 700-800°C, the holding time is 10-20 minutes, and the pressure is 15-25 MPa, and the temperature of the second hot pressing and fusion treatment stage is 910-930°C, the holding time is 10-20 minutes, and the pressure is 25-30 MPa.

2. The glass according to claim 1, wherein The first stainless steel fiber layer, the first thin glass layer, the glass fiber layer, the second thin glass layer, and the second stainless steel fiber layer have the same thickness.

3. The glass according to claim 1, wherein The first glass substrate and the second glass substrate have the same thickness.

4. The glass according to claim 1, wherein The total weight of the first glass substrate and the second glass substrate is a first weight, and the total weight of the first stainless steel fiber layer, the glass fiber layer, and the second stainless steel fiber layer is a second weight, wherein the ratio of the first weight to the second weight is (15-20):

1.

5. A method for preparing glass with improved toughness, characterized in that: The method comprises: providing a first glass substrate and a second glass substrate; Providing a composite reinforcement layer material, wherein the composite reinforcement layer material comprises a first stainless steel fiber layer, a first thin glass layer, a glass fiber layer, a second thin glass layer, and a second stainless steel fiber layer stacked in sequence; stacking the first glass substrate, the composite reinforcement layer material, and the second glass substrate in sequence to obtain a laminate; The laminate is placed in a mold and subjected to a hot pressing fusion process to obtain the glass, wherein the hot pressing fusion process has two hot pressing fusion stages. The hot pressing and fusion treatment is carried out in an argon atmosphere, and the hot pressing and fusion treatment has a first hot pressing and fusion treatment stage and a second hot pressing and fusion treatment stage, wherein the temperature of the first hot pressing and fusion treatment stage is 700-800°C, the holding time is 10-20 minutes, and the pressure is 15-25 MPa, and the temperature of the second hot pressing and fusion treatment stage is 910-930°C, the holding time is 10-20 minutes, and the pressure is 25-30 MPa.

6. The method according to claim 5, wherein: The first stainless steel fiber layer, the first thin glass layer, the glass fiber layer, the second thin glass layer, and the second stainless steel fiber layer have the same thickness.

7. The method according to claim 5, wherein: The first glass substrate and the second glass substrate have the same thickness.

8. The method according to claim 5, wherein The total weight of the first glass substrate and the second glass substrate is a first weight, and the total weight of the first stainless steel fiber layer, the glass fiber layer, and the second stainless steel fiber layer is a second weight, wherein the ratio of the first weight to the second weight is (15-20):1.

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