Ion-sieve material and method for manufacturing the same

Abstract

The application provides an ion sieve material with excellent water resistance and lithium ion absorption rate. The ion sieve material contains, in terms of percentage by weight, SiO2: 30-45%; Al2O3: 17-30%; Na2O: 30.5-45%; Ln2O3: 0.1-5%, the Ln2O3 being one or more of La2O3, Gd2O3, Y2O3 and Yb2O3. Through reasonable component design, the ion sieve material obtained by the application has excellent water resistance and lithium ion absorption rate, and can be used to extract or absorb impurity metal ions in a molten salt compound, so as to purify the molten salt compound.

Description

[0001] This application is a divisional application of the invention patent application with application number 202311805788.9, application date December 26, 2023, and name “Ion sieve material and its manufacturing method”. Technical Field

[0002] The invention relates to an ion sieve material which can be used for extracting or adsorbing impure metal ions in molten salt compounds. Background Art

[0003] During the chemical strengthening process of glass or glass products, the surface compressive stress is generated by the large ions in the salt bath exchanging small ions in the glass. Therefore, in the continuous strengthening process, the small ions Na in the glass are + 、Li + Continuously enter the salt bath to form impurity ions, especially Li + Although the increase is only at the PPM level, it has seriously hindered the normal chemical strengthening process, resulting in a decrease in the CS value of subsequent samples after strengthening and a decrease in mechanical strength. For the above situation, there is a high-sodium ion sieve material in the prior art that absorbs impurity lithium ions in the salt bath. For example, patent CN112645610A discloses a boron-free, phosphorus-free, highly stable ion sieve material and its application, which solves the problem of insufficient absorption capacity and poor absorption rate of lithium ions in the salt bath under high-temperature salt bath during the production process of chemically strengthened glass cover plates, especially for the absorption of poisonous lithium ions. However, due to the excessively high sodium oxide content in the ion sieve material, the ion sieve material has poor water resistance and is prone to moisture absorption during transportation and storage, which seriously reduces the absorption rate of impurity lithium ions. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide an ion sieve material with excellent water resistance and lithium ion absorption rate.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] The ion sieve material comprises, in weight percentage, 30-45% SiO2, 17-30% Al2O3, 30-45% Na2O, and 0.1-5% Ln2O3, wherein the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

[0007] Furthermore, the components of the ion sieve material, expressed in weight percentage, further contain: P2O5: 0-5%; and / or ZnO+MgO: 0-5%.

[0008] The ion sieve material, whose components are expressed in weight percentage, consists of SiO2: 30-45%; Al2O3: 17-30%; Na2O: 30-45%; Ln2O3: 0.1-5%; P2O5: 0-5%; ZnO+MgO: 0-5%, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

[0009] Furthermore, the components of the ion sieve material are expressed in weight percentage, wherein: Ln2O3 / Na2O is 0.01-0.13, preferably Ln2O3 / Na2O is 0.02-0.1, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

[0010] Furthermore, the components of the ion sieve material are expressed in weight percentage, wherein: Al2O3 / Ln2O3 is 5.0~45.0, preferably Al2O3 / Ln2O3 is 6.0~15.0, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

[0011] Furthermore, the components of the ion sieve material are expressed in weight percentage, wherein: (SiO2+Ln2O3) / Na2O is 0.7~1.6, preferably (SiO2+Ln2O3) / Na2O is 1.0~1.3, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

[0012] Furthermore, the components of the ion sieve material are expressed in weight percentage, wherein: SiO2: 31-40%; and / or Al2O3: 20-29%; and / or Na2O: 35-43%; and / or Ln2O3: 1-4%; and / or P2O5: 0-2%; and / or ZnO+MgO: 0-2%, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

[0013] Furthermore, the lithium ion absorption rate of the ion sieve material is 6 to 18 g / kg, preferably 10 to 18 g / kg; and / or the leaching percentage of the ion sieve material is 0.2 to 0.6, preferably 0.2 to 0.4.

[0014] Furthermore, the pH value of the salt bath after using the ion sieve material is 7.1 to 8.0, preferably 7.1 to 7.6.

[0015] The method for manufacturing the ion-sieve material comprises the following steps: preparing a furnace charge according to the composition of the ion-sieve material, melting the prepared furnace charge in a smelting furnace at 1200-1500 DEG C to form a liquid glass, and then forming the ion-sieve material into a sheet shape through a forming process.

[0016] Further, the method for manufacturing the ion-sieve material, the melting time in the smelting furnace is 5-10 hours, and the thickness of the ion-sieve material is 0.2-0.8 mm, preferably 0.3-0.6 mm.

[0017] The ion-sieve material obtained by the method has excellent water resistance and lithium ion absorption rate, and can be used to extract or absorb impurity metal ions in a molten salt compound to purify the molten salt compound. DETAILED DESCRIPTION

[0018] The ion-sieve material of the present application is a glass material, and is sometimes referred to as ion-sieve glass or ion-sieve in the present application. The ion-sieve material of the present application can be used to extract or absorb impurity metal ions in a molten salt compound to purify the molten salt compound. For example, the ion-sieve material of the present application can be used to absorb lithium ions in a salt bath during chemical strengthening of "glass", which is a broad concept and can include ordinary glass, high-alumina glass, glass-ceramics, glass products (including any object made wholly or partly of glass), and the like.

[0019] [Ion-sieve material]

[0020] The ranges of the components of the ion-sieve material of the present application are described below. In the present application, the content of each component and the total content are expressed by weight percent (wt%) if not otherwise specified, i.e., the content of each component and the total content are expressed by weight percent with respect to the total amount of the ion-sieve material substance converted into an oxide composition. Here, the "converted into an oxide composition" means that, in the case where the oxides, complex salts, and hydroxides, etc. used as raw materials for the components of the ion-sieve material of the present application are decomposed and converted into oxides upon melting, the total amount of the oxides is taken as 100%.

[0021] Unless otherwise indicated in specific circumstances, the numerical ranges listed herein include upper and lower limits, and "above" and "below" include the endpoints, as well as all integers and fractions within the range, without limitation to the specific values ​​listed when defining the range. The term "about" as used herein means that components, parameters and other quantities and features are not, and need not be, exact, and may be approximate and / or larger or lower, if necessary, reflecting tolerances, conversion factors and measurement errors, etc. "and / or" as used herein is inclusive, for example, "A; and / or B" means only A, or only B, or both A and B.

[0022] SiO2 is a component that forms the skeleton of the ion sieve material. Increasing the SiO2 content can improve the mechanical strength of the ion sieve material. However, too high a SiO2 content can reduce the lithium ion absorption rate of the ion sieve material. If the SiO2 content is too low, it is difficult to form glass, and the stability of the ion sieve material is poor. Therefore, the SiO2 content is 30-45%, preferably 31-40%. In some embodiments, the SiO2 content may be about 30%, 30.5%, 31%, 31.5%, 32%, 32.5%, 33%, 33.5%, 34%, 34.5%, 35%, 35.5%, 36%, 36.5%, 37%, 37.5%, 38%, 38.5%, 39%, 39.5%, 40%, 40.5%, 41%, 41.5%, 42%, 42.5%, 43%, 43.5%, 44%, 44.5%, 45%.

[0023] Al2O3 is a glass intermediate oxide, which helps improve the mechanical properties and chemical stability of the ion sieve material of the present invention. Furthermore, Al2O3 can form [AlO4] tetrahedra, replacing some [SiO4] tetrahedra to form a network structure, thereby increasing the molecular volume and expanding the structural network space, facilitating the diffusion of alkali metal ions and thereby improving the lithium ion absorption rate. If the Al2O3 content is too high, the ion sieve material will be difficult to form. Therefore, the Al2O3 content in the present invention is 17-30%, preferably 20-29%. In some embodiments, the Al2O3 may include about 17%, 17.5%, 18%, 18.5%, 19%, 19.5%, 20%, 20.5%, 21%, 21.5%, 22%, 22.5%, 23%, 23.5%, 24%, 24.5%, 25%, 25.5%, 26%, 26.5%, 27%, 27.5%, 28%, 28.5%, 29%, 29.5%, 30%.

[0024] Na2O is a component that exchanges lithium ions between the ion-sieving material and the salt bath, improving the efficiency of lithium ion exchange. However, as a component of the glass network, if the Na2O content is too high, glass formation becomes difficult and the chemical stability of the ion-sieving material deteriorates, particularly its water resistance. Therefore, to balance the chemical stability of the ion-sieving material and the lithium ion absorption rate, the Na2O content in the present invention is 30-45%, preferably 35-43%. In some embodiments, the present invention may include about 30%, 30.5%, 31%, 31.5%, 32%, 32.5%, 33%, 33.5%, 34%, 34.5%, 35%, 35.5%, 36%, 36.5%, 37%, 37.5%, 38%, 38.5%, 39%, 39.5%, 40%, 40.5%, 41%, 41.5%, 42%, 42.5%, 43%, 43.5%, 44%, 44.5%, 45% Na2O.

[0025] Ln2O3 is a network exosome (Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3), and is located in the network gaps of the ion sieve material. However, due to its large ionic radius and high coordination number, Ln2O3 can make the structure of the ion sieve material more compact and improve the water resistance of the ion sieve material. The inventors have found through a large number of experimental studies that a small amount of Ln2O3 has little effect on the lithium ion absorption rate, but if its content exceeds 5%, the lithium ion absorption rate of the ion sieve material drops sharply. Therefore, the content of Ln2O3 in the present invention is 0.1 to 5%, preferably 1 to 4%. In some embodiments, Ln2O3 is preferably La2O 3。 In some embodiments, the present invention may comprise about 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 3.1%, 3.2%, 3.3%, 3.4%, 3.5%, 3.6%, 3.7%, 3.8%, 3.9%, 4%, 4.1%, 4.2%, 4.3%, 4.4%, 4.5%, 4.6%, 4.7%, 4.8%, 4.9%, 5% Ln2O3.

[0026] The inventors have found through extensive experimental research that, in some embodiments, the ratio of the content of Ln2O3 to the content of Na2O (Ln2O3 / Na2O) has a significant impact on the lithium ion absorption rate of the ion sieve material. In particular, when Ln2O3 / Na2O is in the range of 0.01 to 0.13, the lithium ion absorption rate of the ion sieve material can be improved. Therefore, preferably, Ln2O3 / Na2O is 0.01 to 0.13, and more preferably, Ln2O3 / Na2O is 0.02 to 0.1. In some embodiments, the value of Ln2O3 / Na2O can be 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, or 0.13.

[0027] Controlling the pH value of the salt bath is particularly important for chemical strengthening of glass. If the pH value of the salt bath is high, the surface of the glass is easily corroded during the chemical strengthening process, thereby reducing the mechanical properties of the glass. The inventors have found through extensive experimental research that in some embodiments, by controlling the ratio between the content of Al2O3 and the content of Ln2O3 (Al2O3 / Ln2O3) within the range of 5.0 to 45.0, the ion sieve material can have a suitable pH value during use in the sodium nitrate salt bath or the mixed salt bath of sodium nitrate and potassium nitrate. It is easier to control the pH value between 7.1 and 8.0, and the ion sieve material can obtain an excellent lithium ion absorption rate. Therefore, the Al2O3 / Ln2O3 is preferably 5.0 to 45.0, and the Al2O3 / Ln2O3 is more preferably 6.0 to 15.0. In some embodiments, the value of Al2O3 / Ln2O3 may be 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0, 32.5, 33.0, 33.5, 34.0, 34.5, 35.0, 35.5, 36.0, 36.5, 37.0, 37.5, 38.0, 38.5, 39.0, 39.5, 40.0, 40.5, 41.0, 41.5, 42.0, 42.5, 43.0, 43.5, 44.0, 44.5, 45.0.

[0028] In some embodiments, controlling the ratio of the total content of SiO2 and Ln2O3 (SiO2 + Ln2O3) to the content of Na2O ((SiO2 + Ln2O3) / Na2O) in the range of 0.7 to 1.6) can improve the water resistance of the ion sieve material and reduce the leaching percentage of the ion sieve material. Therefore, preferably, (SiO2 + Ln2O3) / Na2O is 0.7 to 1.6, and more preferably, (SiO2 + Ln2O3) / Na2O is 1.0 to 1.3. In some embodiments, the value of (SiO2 + Ln2O3) / Na2O can be 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, or 1.6.

[0029] P2O5 can form an aluminum phosphate (AlPO4) structure, which is composed of aluminum and phosphorus in a tetrahedral coordination. Compared to the network structure of silicon-oxygen tetrahedrons, aluminum phosphate has a larger volume and does not disrupt the overall network structure of the ion sieve material. It can increase the ion exchange rate and thus the lithium ion absorption rate. If the P2O5 content is too high, the stability of the ion sieve material will be poor, and phosphorus ions will easily precipitate during use, contaminating the glass surface to be strengthened and corroding the glass. Therefore, the P2O5 content is 0-5%, preferably 0-2%. In some embodiments, the present invention may comprise about 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 3.1%, 3.2%, 3.3%, 3.4%, 3.5%, 3.6%, 3.7%, 3.8%, 3.9%, 4%, 4.1%, 4.2%, 4.3%, 4.4%, 4.5%, 4.6%, 4.7%, 4.8%, 4.9%, 5% P2O5.

[0030] ZnO and MgO can reduce the viscosity of the ion sieve material during the manufacturing process, reduce the smelting temperature, and reduce the difficulty of smelting. In addition, due to the mixed alkali effect, ZnO and MgO can improve the water resistance of the ion sieve material. However, if the content of ZnO and MgO is too high, it will hinder ion exchange and reduce the lithium ion absorption rate of the ion sieve material. Therefore, the total content of ZnO and MgO is 0-5%, preferably 0-2%. In some embodiments, the total content of ZnO and MgO is about 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 2.1 %, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 3.1%, 3.2%, 3.3%, 3.4%, 3.5%, 3.6%, 3.7%, 3.8%, 3.9%, 4%, 4.1%, 4.2%, 4.3%, 4.4%, 4.5%, 4.6%, 4.7%, 4.8%, 4.9%, 5%.

[0031] The "0%" recorded herein means that the compound, molecule or element is not intentionally added as a raw material to the ion sieve material of the present invention. However, as the raw materials and / or equipment for producing the ion sieve material, there may be certain impurities or components that are not intentionally added, which may be contained in small amounts or trace amounts in the final ion sieve material. Such situations are also within the scope of protection of the patent of the present invention.

[0032] Next, the performance of the ion sieve material of the present invention will be described.

[0033] <Lithium ion absorption rate>

[0034] A sodium nitrate salt bath or a mixed sodium nitrate and potassium nitrate salt bath containing a certain mass of lithium ions is maintained at a certain temperature. A certain mass of ion sieve material is placed in the salt bath. The mass of lithium ions absorbed within a specified time is measured as the ion absorption rate, expressed in g / kg, meaning the weight of lithium ions absorbed per kilogram of the ion sieve material within that time. The initial value of lithium ion impurities in the salt bath used in the lithium ion absorption rate test is 200 ppm, and the absorption time is 5 hours.

[0035] In some embodiments, the lithium ion absorption rate of the ion sieve material of the present invention is 6 to 18 g / kg, preferably 10 to 18 g / kg.

[0036] <Water resistance stability>

[0037] In this invention, the leaching percentage is used to characterize the water resistance stability of the ion sieve material. In this invention, the water resistance stability is sometimes referred to as water resistance stability or water resistance. The water resistance stability of the ion sieve material is tested according to the test method specified in GB / T 17129, and the leaching percentage of the glass is calculated according to the following formula:

[0038] Dw=(BC) / (BA)×100%

[0039] Where: D w ─Glass leaching percentage, %;

[0040] B─mass of filter and sample, g;

[0041] C─mass of the filter and the sample after erosion, g;

[0042] A─filter mass, g;

[0043] In some embodiments, the leaching percentage of the ion sieve material of the present invention is 0.2 to 0.6, preferably 0.2 to 0.4.

[0044] <Salt Bath pH Value>

[0045] Keep a 3 kg sodium nitrate salt bath or a mixed salt bath of sodium nitrate and potassium nitrate at 450°C. Place 450 g of ion sieve material in the salt bath. After 5 hours, remove the ion sieve material. Cool a small amount of sodium nitrate salt bath. Weigh 5 g of salt and fully dissolve it in 100 ml of deionized water. Measure the pH value using a pH meter.

[0046] In some embodiments, the pH value of the salt bath after using the ion sieve material of the present invention is 7.1 to 8.0, preferably 7.1 to 7.6.

[0047] [Method for producing ion sieve material]

[0048] The manufacturing method of the ion sieve material of the present invention is as follows:

[0049] The manufacturing method of the ion sieve material of the present invention includes processes such as batching, melting and molding. The ion sieve material of the present invention uses conventional raw materials, including but not limited to salts (such as carbonates, nitrates, sulfates, etc.), hydroxides, oxides, etc. as raw materials. After the composition of the ion sieve material of the present invention is batched according to the conventional method, the prepared furnace charge is put into a smelting furnace (such as platinum crucible, quartz crucible, etc.) at 1200-1500°C to melt and form liquid glass. The preferred melting time is 5-10 hours. The liquid glass is then made into a thin sheet of ion sieve material through a molding process. The thickness of the preferred ion sieve material is 0.2-0.8 mm, and the more preferred thickness is 0.3-0.6 mm. In some embodiments, the ion sieve material can be rolled into a thin sheet by a roller forming machine.

[0050] Example

[0051] In order to further clearly illustrate and describe the technical solutions of the present invention, the following non-limiting examples are provided.

[0052] This embodiment uses the above-mentioned method for manufacturing ion sieve materials to obtain ion sieve materials having the compositions shown in Tables 1 to 3. In addition, the properties of each ion sieve material were measured using the test method described in the present invention, and the measurement results are shown in Tables 1 to 3.

[0053] Table 1.

[0054]

[0055]

[0056] Table 2.

[0057] Example (wt%) 7# 8# 9# 10# 11# 12# <![CDATA[SiO2]]> 44.0 42.0 37.0 37.0 38.0 37.0 <![CDATA[Al2O3]]> 22.0 23.0 22.5 20.0 20.0 24.0 <![CDATA[Na2O]]> 30.0 31.0 40.0 39.0 37.3 38.0 <![CDATA[P2O5]]> 0.5 0.5 0 0 0 0 ZnO 0 0 0 1.0 2.0 0 MgO 0 0 0 1.0 2.0 0 <![CDATA[La2O3]]> 3.5 3.5 0.5 2.0 0.7 1.0 <![CDATA[Y2O3]]> 0 0 0 0 0 0 <![CDATA[Gd2O3]]> 0 0 0 0 0 0 <![CDATA[Yb2O3]]> 0 0 0 0 0 0 Ln2O3 / Na2O 0.117 0.113 0.013 0.051 0.019 0.026 Al2O3 / Ln2O3 6.3 6.6 45.0 10.0 28.6 24.0 <![CDATA[(SiO2+Ln2O3) / Na2O]]> 1.58 1.47 0.94 1.0 1.04 1.0 Salt bath pH 7.2 7.3 8.0 7.5 7.8 7.7 Leaching percentage 0.2 0.24 0.54 0.48 0.38 0.47 Lithium ion absorption rate g / kg 6.4 6.8 15.3 12.7 11.4 14.1

[0058] Table 3.

[0059]

[0060]

Claims

1. Ion sieve material, characterized in that Its components, expressed in weight percentage, contain: SiO2: 30-45%; Al2O3: 17-30%; Na2O: 30.5-45%; Ln2O3: 0.1-5%, Ln2O3 / Na2O is 0.01-0.13, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

2. The ion sieve material according to claim 1, characterized in that The components thereof are expressed in weight percentage and further contain: P2O5: 0-5%; and / or ZnO+MgO: 0-5%.

3. Ion sieve material, characterized in that Its components are expressed in weight percentage, consisting of SiO2: 30-45%; Al2O3: 17-30%; Na2O: 30.5-45%; Ln2O3: 0.1-5%; P2O5: 0-5%; ZnO+MgO: 0-5%, Ln2O3 / Na2O is 0.01-0.13, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

4. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Ln2O3 / Na2O is 0.02-0.1, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

5. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Ln2O3 / Na2O is 0.01-0.09, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

6. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Ln2O3 / Na2O is 0.01-0.08, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

7. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Ln2O3 / Na2O is 0.02-0.07, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

8. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Al2O3 / Ln2O3 is 5.0-45.0, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

9. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Al2O3 / Ln2O3 is 6.0-15.0, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

10. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Al2O3 / Ln2O3 is 7.0-45.0, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

11. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Al2O3 / Ln2O3 is 8.0-45.0, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

12. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Al2O3 / Ln2O3 is 9.0-45.0, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

13. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Al2O3 / Ln2O3 is 10.0-45.0, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

14. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Al2O3 / Ln2O3 is 10.0-30.0, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

15. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein Al2O3 / Ln2O3 is 10.0-20.0, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

16. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein: (SiO2+Ln2O3) / Na2O is 0.7-1.6, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

17. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein: (SiO2+Ln2O3) / Na2O is 1.0-1.3, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

18. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein: (SiO2+Ln2O3) / Na2O is 1.0-1.6, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

19. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein: (SiO2+Ln2O3) / Na2O is 1.1-1.6, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

20. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein: (SiO2+Ln2O3) / Na2O is 1.15-1.4, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

21. The ion sieve material according to any one of claims 1 to 3, characterized in that: Its components are expressed in weight percentage, including: SiO2: 31-40%; and / or Al2O3: 20-29%; and / or Na2O: 35-43%; and / or Ln2O3: 0.1-4%; and / or P2O5: 0-2%; and / or ZnO+MgO: 0-2%, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

22. The ion sieve material according to any one of claims 1 to 3, characterized in that: Its components are expressed in weight percentage, including: SiO2: 35.5-39.5%; and / or Al2O3: 23-29%; and / or Na2O: 36-43%; and / or Ln2O3: 0.1-3%; and / or P2O5: 0-1%; and / or ZnO+MgO: 0-1%, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

23. The ion sieve material according to any one of claims 1 to 3, characterized in that: Its components are expressed in weight percentage, including: SiO2: 35.5-39%; and / or Al2O3: 23.5-27%; and / or Na2O: 36.5-40%; and / or Ln2O3: 0.5-2%; and / or P2O5: 0-0.5%; and / or ZnO+MgO: 0-0.5%, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

24. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein: Ln2O3: 0.1-3.5%, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

25. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein: Ln2O3: 0.2-3%, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

26. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein: Ln2O3: Ln2O3: 0.3-2.5%, wherein the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

27. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein: Ln2O3: 0.4-2%, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

28. The ion sieve material according to any one of claims 1 to 3, characterized in that: The components are expressed in weight percentage, wherein: Ln2O3: 0.5-1.5%, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

29. The ion sieve material according to any one of claims 1 to 3, characterized in that: The lithium ion absorption rate of the ion sieve material is 6 to 18 g / kg; and / or the leaching percentage of the ion sieve material is 0.2 to 0.

6.

30. The ion sieve material according to any one of claims 1 to 3, characterized in that The lithium ion absorption rate of the ion sieve material is 10 to 18 g / kg; and / or the leaching percentage of the ion sieve material is 0.2 to 0.

4.

31. The ion sieve material according to any one of claims 1 to 3, characterized in that The pH value of the salt bath after using the ion sieve material is 7.1-8.

0.

32. The ion sieve material according to any one of claims 1 to 3, characterized in that The pH value of the salt bath after using the ion sieve material is 7.1 to 7.

6.

33. A method for producing an ion sieve material, for preparing the ion sieve material according to any one of claims 1 to 32, characterized in that: The method comprises the following steps: preparing furnace charge according to the composition of the ion sieve material, putting the prepared furnace charge into a melting furnace at 1200-1500°C to melt to form liquid glass, and then forming the liquid glass into thin sheet-shaped ion sieve material through a molding process.

34. The method for manufacturing an ion sieve material according to claim 33, wherein: The melting time in the melting furnace is 5 to 10 hours, and the thickness of the ion sieve material is 0.2 to 0.8 mm.

35. The method for manufacturing an ion sieve material according to claim 33, wherein: The thickness of the ion sieve material is 0.3-0.6 mm.

Images