Ion sieve material and method of making same

Abstract

Provided is an ion sieve material having excellent water resistance and lithium ion absorptivity. The ion sieve material comprises the following components in percentage by weight: 30-45% of SiO2; 17 to 30 percent of Al2O3; 30.5 to 45 percent of Na2O (sodium oxide); the content of Ln2O3 is 0.1 to 5 percent, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3 and Yb2O3. Through reasonable component design, the ion sieve material obtained by the invention has excellent water resistance and lithium ion absorptivity, and can be used for extracting or adsorbing impurity metal ions in a molten salt compound so as to purify the molten salt compound.

Description

[0001] This application is a divisional application for 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, resulting in a decrease in the CS value of subsequent samples after strengthening and a decrease in mechanical strength. For the above situation, the prior art uses high-sodium ion sieve materials to absorb 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 baths during the production of chemically strengthened glass cover plates, especially for the absorption of poisoning lithium ions. However, due to the excessively high sodium oxide content in the ion sieve material, the ion sieve material has poor water resistance, is easy to absorb moisture during transportation and storage, and seriously reduces the absorption rate of impurity lithium ions. Summary of the invention

[0004] In view of the shortcomings of the prior art, 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] Ion sieve material, its components expressed in weight percentage, contains: SiO 2 :30~45%;Al 2 O 3 :17~30%;Na 2 O: 30~45%; Ln 2 O 3 : 0.1~5%, said Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O3 , Yb 2 O 3 One or more of .

[0007] Furthermore, the ion sieve material, expressed in weight percentage, also contains: 2 O 5 : 0~5%; and / or ZnO+MgO: 0~5%.

[0008] Ion sieve materials, whose components are expressed in weight percentage, are composed of SiO 2 :30~45%;Al 2 O 3 :17~30%;Na 2 O: 30~45%; Ln 2 O 3 :0.1~5%;P 2 O 5 :0~5%;ZnO+MgO:0~5%, the Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 One or more of .

[0009] Furthermore, the components of the ion sieve material are expressed in weight percentage, wherein: Ln 2 O 3 / Na 2 O is 0.01 to 0.13, preferably Ln 2 O 3 / Na 2 O is 0.02 to 0.1, and Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 One or more of .

[0010] Furthermore, the components of the ion sieve material are expressed in weight percentage, wherein: Al 2 O 3 / Ln 2 O 3 5.0~45.0, preferably Al 2 O3 / Ln 2 O 3 is 6.0~15.0, said Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 One or more of .

[0011] Furthermore, the components of the ion sieve material are expressed in weight percentage, wherein: (SiO 2 +Ln 2 O 3 ) / Na 2 O is 0.7 to 1.6, preferably (SiO 2 +Ln 2 O 3 ) / Na 2 O is 1.0 to 1.3, and Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 One or more of .

[0012] Furthermore, the components of the ion sieve material are expressed in weight percentage, wherein: SiO 2 : 31-40%; and / or Al 2 O 3 :20~29%;and / or Na 2 O: 35-43%; and / or Ln 2 O 3 :1~4%;and / or P 2 O 5 : 0-2%; and / or ZnO+MgO: 0-2%, the Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 One or more of .

[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 invention discloses a method for manufacturing an ion sieve material, the method comprising the following steps: preparing a 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 a thin sheet of ion sieve material through a molding process.

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

[0017] The beneficial effects of the present invention are as follows: through reasonable component design, the ion sieve material obtained by the present invention has excellent water resistance and lithium ion absorption rate, and can be used to extract or adsorb impure metal ions in molten salt compounds to purify the molten salt compounds. DETAILED DESCRIPTION

[0018] Below, the embodiments of the ion sieve material of the present invention are described in detail, but the present invention is not limited to the embodiments described below, and can be implemented with appropriate changes within the scope of the purpose of the present invention. In addition, although there are appropriate omissions in the description of repeated parts, the main purpose of the invention will not be limited thereby. The ion sieve material of the present invention is a glass material, and therefore is sometimes referred to as ion sieve glass or ion sieve in the present invention. The ion sieve material of the present invention can be used to extract or adsorb impurity metal ions in molten salt compounds to purify the molten salt compounds. For example, the ion sieve material of the present invention can be used for the adsorption of lithium ions in a salt bath during the chemical strengthening process of "glass", and the "glass" is a broad concept that can include ordinary glass, high-aluminum glass, microcrystalline glass, glass products (including any object made entirely or partially of glass), etc.

[0019] [Ion sieve material]

[0020] The following is an explanation of the range of each component (ingredient) of the ion sieve material of the present invention. In the present invention, unless otherwise specified, the content and total content of each component are all expressed in weight percentage (wt%), that is, the content and total content of each component are expressed in weight percentage relative to the total amount of the ion sieve material material converted into an oxide composition. Here, the "composition converted into oxides" means that when the oxides, composite salts and hydroxides used as raw materials for the components of the ion sieve material of the present invention decompose and transform into oxides when melted, the total amount of the oxide material 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] SiO 2 It is the component that constitutes the skeleton of ion sieve material, increasing SiO 2 The content can improve the mechanical strength of the ion sieve material, but SiO 2 If the content of SiO is too high, the lithium ion absorption rate of the ion sieve material will be reduced. 2 If the content is low, it is difficult to form glass and the stability of the ion sieve material is poor. 2 The content of SiO is 30-45%, preferably 31-40%. In some embodiments, the SiO2 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%. 2 .

[0023] Al 2 O 3 It is a glass intermediate oxide, which is beneficial to improve the mechanical properties and chemical stability of the ion sieve material of the present invention. 2 O 3 Can form [AlO 4 ]tetrahedron, substituted part of [SiO 4] The tetrahedron forms a network structure, thereby increasing the molecular volume and expanding the structural network space, which is conducive to the diffusion of alkali metal ions and thus improving the lithium ion absorption rate. 2 O 3 If the content is too high, the ion sieve material will be difficult to shape. 2 O 3 The content of Al is 17-30%, preferably 20-29%. In some embodiments, the Al content may be 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%. 2 O 3 .

[0024] Na 2 O is a component that exchanges lithium ions with the ion sieve material in the salt bath, which can improve the efficiency of lithium ion exchange. However, as a glass network outer body, if Na 2 If the content of O is too high, it is difficult to form glass, and the chemical stability of the ion sieve material deteriorates, especially the water resistance. Therefore, in order to balance the chemical stability of the ion sieve material and the lithium ion absorption rate, the Na 2 The content of O is 30-45%, preferably 35-43%. In some embodiments, the Na 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%. 2 O.

[0025] Ln 2 O 3 For the network exosome (Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 One or more of them) are in the network gap of the ion sieve material, but due to its large ionic radius and high coordination number, Ln 2 O 3It can make the structure of ion sieve materials more compact and improve the water resistance of ion sieve materials. 2 O 3 The influence on the lithium ion absorption rate is small, but if its content exceeds 5%, the lithium ion absorption rate of the ion sieve material drops sharply. 2 O 3 The content of Ln is 0.1 to 5%, preferably 1 to 4%. 2 O 3 For La 2 O 3。 In some embodiments, the present invention may include 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% Ln 2 O 3 .

[0026] The inventors have found through a large number of experimental studies that in some embodiments, Ln 2 O 3 The content of Na 2 The ratio of O content to Ln 2 O 3 / Na 2 O has an important influence on the lithium ion absorption rate of ion sieve materials, especially Ln 2 O 3 / Na 2 When LnO is in the range of 0.01 to 0.13, the lithium ion absorption rate of the ion sieve material can be improved. 2 O 3 / Na 2 O is 0.01 to 0.13, and more preferably Ln 2 O 3 / Na 2 O is 0.02 to 0.1. In some embodiments, Ln 2 O 3 / Na 2The value of O 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, and 0.13.

[0027] The control of 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 a large number of experimental studies that in some embodiments, by controlling the pH value of the Al 2 O 3 The content of Ln 2 O 3 The ratio of Al 2 O 3 / Ln 2 O 3 When the pH value is within the range of 5.0 to 45.0, the ion sieve material can have a suitable pH value in the sodium nitrate salt bath or the sodium nitrate and potassium nitrate mixed salt bath during use, and it is easier to control the pH value between 7.1 and 8.0. At the same time, the ion sieve material can obtain an excellent lithium ion absorption rate. Therefore, Al 2 O 3 / Ln 2 O 3 5.0 to 45.0, more preferably Al 2 O 3 / Ln 2 O 3 In some embodiments, Al 2 O 3 / Ln 2 O 3The value of can 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 SiO 2 and Ln 2 O 3 Total content of SiO 2 +Ln 2 O 3 with Na 2 The ratio of O content (SiO 2 +Ln 2 O 3 ) / Na 2 O is in the range of 0.7 to 1.6, which can improve the water resistance of the ion sieve material and reduce the leaching percentage of the ion sieve material. Therefore, it is preferred that (SiO 2 +Ln 2 O 3 ) / Na 2 O is 0.7 to 1.6, more preferably (SiO 2 +Ln 2 O 3 ) / Na 2 O is 1.0 to 1.3. In some embodiments, (SiO 2 +Ln 2 O 3 ) / Na 2 The value of O 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, and 1.6.

[0029] P 2 O 5 It can form aluminum phosphate (AlPO 4 ) structure, aluminum phosphate is composed of tetrahedral coordinated aluminum and phosphorus, which has a larger volume compared to the network structure of silicon oxygen tetrahedron, and will not destroy the overall network structure of the ion sieve material, which can increase the ion exchange rate and thus increase the lithium ion absorption rate. 2 O 5 If the content is too high, the stability of the ion sieve material will be poor, and phosphorus ions will easily precipitate during use to contaminate the glass surface that needs to be strengthened and corrode the glass. 2 O 5 The content is 0-5%, preferably 0-2%. In some embodiments, it may include 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% of P 2 O 5 .

[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, too high a content of ZnO and MgO 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 to 5%, preferably 0 to 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 in this article 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 raw materials and / or equipment for producing ion sieve materials, 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. This situation is also within the scope of protection of the patent of this 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 salt bath of sodium nitrate and potassium nitrate containing a certain mass of lithium ions is maintained at a certain temperature, and a certain mass of ion sieve material is placed in the salt bath. The mass of lithium ions absorbed within a specified time is taken as the ion absorption rate, and the unit is g / kg, which means the gram weight of lithium ions that can be absorbed per kilogram of ion sieve material within this time. The initial value of lithium ions impurities in the salt bath for the lithium ion absorption rate test of the present invention is 200ppm, and the time for absorbing lithium ions 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 the present invention, the leaching percentage is used to characterize the water resistance stability of the ion sieve material. In the present 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 filter and 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 3kg sodium nitrate salt bath or a mixed salt bath of sodium nitrate and potassium nitrate at 450°C, put 450g of ion sieve material in the salt bath, take out the ion sieve material after 5 hours, take a small amount of sodium nitrate salt bath to cool, weigh 5g of salt and fully dissolve it in 100ml of deionized water, and use a pH meter to measure the pH value.

[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 using 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 a platinum crucible, a quartz crucible, etc.) at 1200 to 1500°C to melt to form liquid glass. The preferred melting time is 5 to 10 hours. The liquid glass is then formed into a thin sheet of ion sieve material through a molding process. The preferred thickness of the ion sieve material is 0.2 to 0.8 mm, and the more preferred thickness is 0.3 to 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 adopts 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 characteristics of each ion sieve material are measured by 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[SiO 2 ]]> 44.0 42.0 37.0 37.0 38.0 37.0 <![CDATA[Al 2 THE 3 ]]> 22.0 23.0 22.5 20.0 20.0 24.0 <![CDATA[Na 2 The]]> 30.0 31.0 40.0 39.0 37.3 38.0 <![CDATA[P 2 THE 5 ]]> 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[La 2 THE 3 ]]> 3.5 3.5 0.5 2.0 0.7 1.0 <![CDATA[Y 2 THE 3 ]]> 0 0 0 0 0 0 <![CDATA[Gd 2 THE 3 ]]> 0 0 0 0 0 0 <![CDATA[Yb 2 THE 3 ]]> 0 0 0 0 0 0 <![CDATA[Ln 2 O 3 / By 2 Of]]> 0.117 0.113 0.013 0.051 0.019 0.026 <![CDATA[Al 2 O 3 / Ln 2 O 3 ]]> 6.3 6.6 45.0 10.0 28.6 24.0 <![CDATA[(SiO 2 +Ln 2 O 3 ) / By 2 Of]]> 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: The components thereof are expressed in weight percentage and contain: SiO2: 30-45%; Al2O3: 17-30%; Na2O: 30.5-45%; Ln2O3: 0.1-5%, wherein 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, including SiO2: 30-45%; Al2O3: 17-30%; Na2O: 30.5-45%; Ln2O3: 0.1-5%; P2O5: 0-5%; ZnO+MgO: 0-5%, and the Ln2O3 is one or more of La2O3, Gd2O3, Y2O3, and Yb2O3.

4. The ion sieve material according to any one of claims 1 to 3, characterized in that: Its components 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.

5. The ion sieve material according to any one of claims 1 to 3, characterized in that: Its components are expressed in weight percentage, wherein: Ln2O3 / Na2O is 0.01-0.09, preferably Ln2O3 / Na2O is 0.01-0.08, and more preferably Ln2O3 / Na2O is 0.02-0.07, 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: Its components 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.

7. The ion sieve material according to any one of claims 1 to 3, characterized in that: Its components are expressed in weight percentage, wherein: Al2O3 / Ln2O3 is 7.0-45.0, preferably Al2O3 / Ln2O3 is 8.0-45.0, more preferably Al2O3 / Ln2O3 is 9.0-45.0, further preferably Al2O3 / Ln2O3 is 10.0-45.0, further preferably Al2O3 / Ln2O3 is 10.0-30.0, and further preferably Al2O3 / Ln2O3 is 10.0-20.0, 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: Its components 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.

9. The ion sieve material according to any one of claims 1 to 3, characterized in that: Its components are expressed in weight percentage, wherein: (SiO2+Ln2O3) / Na2O is 1.0-1.6, preferably (SiO2+Ln2O3) / Na2O is 1.1-1.6, and more preferably (SiO2+Ln2O3) / Na2O is 1.15-1.4, 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: Its components are expressed in weight percentage, wherein: SiO2: 31-40%, preferably SiO2: 35.5-39.5%, more preferably SiO2: 35.5-39%; and / or Al2O3: 20-29%, preferably Al2O3: 23-29%, more preferably Al2O3: 23.5-27%; and / or Na2O: 35-43%, preferably Na2O: 36-43%, more preferably Na2O: 36.5-40%; and / or Ln2O3 : 0.1-4%, preferably Ln2O3: 0.1-3%, more preferably Ln2O3: 0.5-2%; and / or P2O5: 0-2%, preferably P2O5: 0-1%, more preferably P2O5: 0-0.5%; and / or ZnO+MgO: 0-2%, preferably ZnO+MgO: 0-1%, more preferably ZnO+MgO: 0-0.5%, wherein 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: Its components are expressed in weight percentage, wherein: Ln2O3: 0.1-3.5%, preferably Ln2O3: 0.2-3%, more preferably Ln2O3: 0.3-2.5%, further preferably Ln2O3: 0.4-2%, and further preferably Ln2O3: 0.5-1.5%, wherein 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 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.

13. 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 8.0, preferably 7.1 to 7.

6.

14. A method for producing an ion sieve material, 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 a thin sheet of ion sieve material through a molding process.

15. The method for manufacturing an ion sieve material according to claim 14, characterized in that: 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, preferably 0.3 to 0.6 mm.

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