High-frequency nanocrystalline material, preparation method and application thereof

Abstract

The application belongs to the technical field of alloy smelting, and particularly relates to a high-frequency nanocrystalline material and a preparation method and application thereof. The application provides a high-frequency nanocrystalline material, the material is a high-frequency nanocrystalline alloy, and the composition expression of the alloy is: Fe a Ni b Si c M d N e ; the M is one or more of Ti, Mn, Zn and Al; the N is one or more of La, Ce and Tb; wherein a, b, c, d and e respectively represent the atomic percentage content of each corresponding component, 60<=a<=72, 10<=b<=15, 5<=c<=10, 3<=d<=8, and e=100-a-b-c-d. The high-frequency nanocrystalline material utilizes the characteristics of amorphous alloy, and distributes nanocrystalline particles on the amorphous matrix, so that excellent soft magnetic performance is achieved. The material has the characteristics of high saturation magnetic flux density and low coercivity, and has more excellent performance in high-frequency application.

Description

Technical Field

[0001] This invention belongs to the field of alloy smelting technology, specifically relating to a high-frequency nanocrystalline material, its preparation method, and its application. Background Technology

[0002] Modern power, electronic, and device technologies are developing towards miniaturization, energy efficiency, and high frequency, placing increasingly higher demands on the soft magnetic properties of the iron / magnetic core materials used for electromagnetic conversion. In particular, with the widespread adoption of wireless charging technology, materials that maintain high permeability at frequencies of 100kHz and above are required.

[0003] Nanocrystalline alloys possess excellent soft magnetic properties due to the fine, uniform distribution of α-Fe nanocrystals on an amorphous matrix. High-frequency nanocrystalline materials are used as magnetic components for electromagnetic field induction. These high-frequency nanocrystalline materials mainly contain one or more metallic elements and non-metallic elements such as silicon. The higher content of some of these metallic elements allows them to produce specific magnetic responses in the material to high-frequency electromagnetic fields.

[0004] However, in practical applications, high-frequency nanocrystalline materials do not perform well in the frequency range of 150kHz to 200kHz. Therefore, there is an urgent need to develop a high-frequency nanocrystalline material. Summary of the Invention

[0005] This invention provides a high-frequency nanocrystalline material, the purpose of which is to solve the problem of poor performance of high-frequency nanocrystalline materials in the frequency range of 150kHz to 200kHz in the prior art.

[0006] Therefore, the present invention provides the following technical solution:

[0007] This invention provides a high-frequency nanocrystalline material, wherein the material is a high-frequency nanocrystalline alloy, and the composition formula of the alloy is: Fe a Ni b Si c M d N e ;

[0008] M is one or more of Ti, Mn, Zn, and Al;

[0009] The N is one or more of La, Ce, and Tb;

[0010] Where a, b, c, d and e represent the atomic percentages of the corresponding components: 60≤a≤72, 10≤b≤15, 5≤c≤10, 3≤d≤8, and e=100-abcd.

[0011] Optional: 65≤a≤70, b+c=20, 4≤d≤6.

[0012] Optionally, the saturation magnetic flux density of the high-frequency nanocrystalline material is not less than 1.5T;

[0013] Optionally, the frequency range of the high-frequency nanocrystalline material is 150kHz-200kHz.

[0014] Optionally, the coercivity of the high-frequency nanocrystalline material is less than 10 A / m;

[0015] Optionally, the relative initial magnetic permeability of the high-frequency nanocrystalline alloy is greater than 5000 and less than 20000.

[0016] The present invention also provides a method for preparing the above-mentioned high-frequency nanocrystalline material, comprising the following steps:

[0017] S1: Prepare the ingredients according to the composition, and then perform vacuum smelting to obtain alloy ingots;

[0018] S2: After crushing the obtained alloy ingot, alloy strip is prepared by single-roll rapid quenching method;

[0019] S3: After heat treatment, the obtained alloy strip is used to obtain high-frequency nanocrystalline material.

[0020] Optionally, in step S3, the temperature of the heat treatment is 450-480°C;

[0021] And / or, the heat treatment time is 20-30 min.

[0022] Optionally, in step S1, the temperature of the vacuum smelting is 1200-1400℃;

[0023] And / or, the vacuum smelting time is 10-15 min.

[0024] The present invention also provides an application of the above-mentioned high-frequency nanocrystalline material or the high-frequency nanocrystalline material prepared by the above-mentioned preparation method in transformers, inductor cores, relays, RFID antennas, high-frequency sensors, and wireless charging.

[0025] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0026] 1. The high-frequency nanocrystalline material of this invention utilizes the properties of amorphous alloys to distribute nanocrystalline particles on an amorphous matrix, thereby achieving excellent soft magnetic properties. It features high saturation magnetic flux density and low coercivity, exhibiting superior performance in high-frequency applications.

[0027] 2. The high-frequency nanocrystalline material obtained by the preparation method provided by the present invention has outstanding heat treatment resistance and can maintain high magnetic permeability after appropriate heat treatment, which can meet the needs of practical applications.

[0028] 3. The high-frequency nanocrystalline material provided by this invention is suitable for magnetic components that require high-frequency electromagnetic field induction, such as transformers, inductor cores, relays, RFID antennas, high-frequency sensors, and wireless charging, and has broad application prospects.

[0029] 4. The preparation method provided by this invention uses simple preparation methods such as vacuum smelting and single-roll rapid quenching, which can realize the preparation of high-quality high-frequency nanocrystalline materials at relatively low cost, thus improving the feasibility of commercial application. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Those skilled in the art should understand that the embodiments described are merely illustrative of the invention and should not be considered as specific limitations thereof. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0031] The embodiments of the present invention are implemented under the premise of the technical solution of the present invention, and detailed implementation methods and processes are given. However, the protection scope of the present invention is not limited to the following embodiments. The process parameters in the following embodiments that do not specify specific conditions are generally in accordance with conventional conditions.

[0032] The endpoints and any values ​​of the ranges disclosed in this invention 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 in this invention.

[0033] Example 1

[0034] This embodiment provides a high-frequency nanocrystalline material, which is a high-frequency nanocrystalline alloy. The composition formula of the alloy is: Fe 70 Ni 12 Si8Mn5La5.

[0035] This embodiment also provides a method for preparing high-frequency nanocrystalline materials, including the following steps:

[0036] S1: Prepare the alloy ingot according to the atomic percentage content in the alloy composition expression, and then vacuum smelt it at 1300℃ for 12 minutes to obtain the alloy ingot;

[0037] S2: After crushing the alloy ingot, it is loaded into a quartz tube and prepared by single-tube rapid cooling and spinning method to obtain alloy strip.

[0038] S3: Place the alloy strip in a crucible and heat it at 460℃ for 25 minutes under a nitrogen atmosphere to obtain high-frequency nanocrystalline material.

[0039] Example 2

[0040] This embodiment provides a high-frequency nanocrystalline material, which is a high-frequency nanocrystalline alloy. The composition formula of the alloy is: Fe 70 Ni 13 Si7Mn5La5.

[0041] This embodiment also provides a method for preparing high-frequency nanocrystalline materials, including the following steps:

[0042] S1: Prepare the alloy ingot according to the atomic percentage content in the alloy composition expression, and then vacuum smelt it at 1300℃ for 12 minutes to obtain the alloy ingot;

[0043] S2: After crushing the alloy ingot, it is loaded into a quartz tube and prepared by single-tube rapid cooling and spinning method to obtain alloy strip.

[0044] S3: Place the alloy strip in a crucible and heat it at 460℃ for 25 minutes under a nitrogen atmosphere to obtain high-frequency nanocrystalline material.

[0045] Example 3

[0046] This embodiment provides a high-frequency nanocrystalline material, which is a high-frequency nanocrystalline alloy. The composition formula of the alloy is: Fe 70 Ni 15 Si 10 Mn3La2.

[0047] This embodiment also provides a method for preparing high-frequency nanocrystalline materials, including the following steps:

[0048] S1: Prepare the alloy ingot according to the atomic percentage content in the alloy composition expression, and then vacuum smelt it at 1300℃ for 12 minutes to obtain the alloy ingot;

[0049] S2: After crushing the alloy ingot, it is loaded into a quartz tube and prepared by single-tube rapid cooling and spinning method to obtain alloy strip.

[0050] S3: Place the alloy strip in a crucible and heat it at 460℃ for 25 minutes under a nitrogen atmosphere to obtain high-frequency nanocrystalline material.

[0051] Example 4

[0052] This embodiment provides a high-frequency nanocrystalline material, which is a high-frequency nanocrystalline alloy. The composition formula of the alloy is: Fe 70 Ni 10 Si 10 Mn8La2.

[0053] This embodiment also provides a method for preparing high-frequency nanocrystalline materials, including the following steps:

[0054] S1: Prepare the alloy ingot according to the atomic percentage content in the alloy composition expression, and then vacuum smelt it at 1300℃ for 12 minutes to obtain the alloy ingot;

[0055] S2: After crushing the alloy ingot, it is loaded into a quartz tube and prepared by single-tube rapid cooling and spinning method to obtain alloy strip.

[0056] S3: Place the alloy strip in a crucible and heat it at 460℃ for 25 minutes under a nitrogen atmosphere to obtain high-frequency nanocrystalline material.

[0057] Example 5

[0058] This embodiment provides a high-frequency nanocrystalline material, which is a high-frequency nanocrystalline alloy. The composition formula of the alloy is: Fe 70 Ni 15 Si5Mn3La7.

[0059] This embodiment also provides a method for preparing high-frequency nanocrystalline materials, including the following steps:

[0060] S1: Prepare the alloy ingot according to the atomic percentage content in the alloy composition expression, and then vacuum smelt it at 1300℃ for 12 minutes to obtain the alloy ingot;

[0061] S2: After crushing the alloy ingot, it is loaded into a quartz tube and prepared by single-tube rapid cooling and spinning method to obtain alloy strip.

[0062] S3: Place the alloy strip in a crucible and heat it at 460℃ for 25 minutes under a nitrogen atmosphere to obtain high-frequency nanocrystalline material.

[0063] Example 6

[0064] This embodiment provides a high-frequency nanocrystalline material, which is a high-frequency nanocrystalline alloy. The composition formula of the alloy is: Fe 70 Ni 12 Si8Mn5La5.

[0065] This embodiment also provides a method for preparing high-frequency nanocrystalline materials, including the following steps:

[0066] S1: Prepare the alloy ingot according to the atomic percentage content in the alloy composition expression, and then vacuum smelt it at 1350℃ for 12 minutes to obtain the alloy ingot;

[0067] S2: After crushing the alloy ingot, it is loaded into a quartz tube and prepared by single-tube rapid cooling and spinning method to obtain alloy strip.

[0068] S3: Place the alloy strip in a crucible and heat it at 470℃ for 25 minutes under a nitrogen atmosphere to obtain high-frequency nanocrystalline material.

[0069] Example 7

[0070] This embodiment provides a high-frequency nanocrystalline material, which is a high-frequency nanocrystalline alloy. The composition formula of the alloy is: Fe 70 Ni 12 Si8Mn5La5.

[0071] This embodiment also provides a method for preparing high-frequency nanocrystalline materials, including the following steps:

[0072] S1: Prepare the alloy ingot according to the atomic percentage content in the alloy composition expression, and then vacuum smelt it at 1250℃ for 12 minutes to obtain the alloy ingot;

[0073] S2: After crushing the alloy ingot, it is loaded into a quartz tube and prepared by single-tube rapid cooling and spinning method to obtain alloy strip.

[0074] S3: Place the alloy strip in a crucible and heat it at 450℃ for 25 minutes under a nitrogen atmosphere to obtain high-frequency nanocrystalline material.

[0075] Comparative Example 1

[0076] This embodiment provides a high-frequency nanocrystalline material, which is a high-frequency nanocrystalline alloy. The composition formula of the alloy is: Fe 70 Ni9Si 11 Mn5La5.

[0077] This embodiment also provides a method for preparing high-frequency nanocrystalline materials, including the following steps:

[0078] S1: Prepare the alloy ingot according to the atomic percentage content in the alloy composition expression, and then vacuum smelt it at 1300℃ for 12 minutes to obtain the alloy ingot;

[0079] S2: After crushing the alloy ingot, it is loaded into a quartz tube and prepared by single-tube rapid cooling and spinning method to obtain alloy strip.

[0080] S3: Place the alloy strip in a crucible and heat it at 460℃ for 25 minutes under a nitrogen atmosphere to obtain high-frequency nanocrystalline material.

[0081] Comparative Example 2

[0082] This embodiment provides a high-frequency nanocrystalline material, which is a high-frequency nanocrystalline alloy. The composition formula of the alloy is: Fe 70 Ni 16 Si4Mn5La5.

[0083] This embodiment also provides a method for preparing high-frequency nanocrystalline materials, including the following steps:

[0084] S1: Prepare the alloy ingot according to the atomic percentage content in the alloy composition expression, and then vacuum smelt it at 1300℃ for 12 minutes to obtain the alloy ingot;

[0085] S2: After crushing the alloy ingot, it is loaded into a quartz tube and prepared by single-tube rapid cooling and spinning method to obtain alloy strip.

[0086] S3: Place the alloy strip in a crucible and heat it at 460℃ for 25 minutes under a nitrogen atmosphere to obtain high-frequency nanocrystalline material.

[0087] Test case

[0088] The statistical results of the performance data of the iron-based nanocrystalline alloys obtained in Examples 1-7 and Comparative Examples 1-2 are shown in the table below:

[0089] Example 1 1.82 17670 2.573 Example 2 1.76 16430 3.182 Example 3 1.54 13540 5.746 Example 4 1.65 14680 4.733 Example 5 1.61 15760 4.128 Example 6 1.72 16710 3.016 Example 7 1.77 17110 2.972 Comparative Example 1 1.32 11240 9.153 Comparative Example 2 1.36 12100 10.044

[0090] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention shall be within the scope of protection of the pending claims of the present invention.

Claims

1. A high-frequency nanocrystalline material, characterized in that, The material is a high-frequency nanocrystalline alloy, and the composition formula of the alloy is: Fe a Ni b Si c M d N e ; M is Mn; N is one or more of La, Ce, and Tb; Where a, b, c, d and e represent the atomic percentages of the corresponding components: 60≤a≤72, 10≤b≤15, 5≤c≤10, 3≤d≤8, and e=100-abcd.

2. The high-frequency nanocrystalline material according to claim 1, characterized in that, 65≤a≤70, b+c=20, 4≤d≤6.

3. The high-frequency nanocrystalline material according to claim 1, characterized in that, The saturation magnetic flux density of the high-frequency nanocrystalline material is not less than 1.5T.

4. The high-frequency nanocrystalline material according to claim 1, characterized in that, The frequency range of the high-frequency nanocrystalline material is 150kHz-200kHz.

5. The high-frequency nanocrystalline material according to claim 1, characterized in that, The coercivity of the high-frequency nanocrystalline material is less than 10 A / m.

6. The high-frequency nanocrystalline material according to claim 1, characterized in that, The relative initial magnetic permeability of the high-frequency nanocrystalline alloy is greater than 5000 and less than 20000.

7. A method for preparing the high-frequency nanocrystalline material according to any one of claims 1-6, characterized in that, Includes the following steps: S1: Prepare the ingredients according to the composition, and then perform vacuum smelting to obtain alloy ingots; S2: After crushing the obtained alloy ingot, alloy strip is prepared by single-roll rapid quenching method; S3: After heat treatment, the obtained alloy strip is used to obtain high-frequency nanocrystalline material.

8. The preparation method according to claim 7, characterized in that, In step S3, the temperature of the heat treatment is 450-480℃; And / or, the heat treatment time is 20-30 min.

9. The preparation method according to claim 7, characterized in that, In step S1, the temperature of the vacuum smelting is 1200-1400℃; And / or, the vacuum smelting time is 10-15 min.

10. The application of a high-frequency nanocrystalline material according to any one of claims 1-6 or a high-frequency nanocrystalline material prepared by the preparation method according to any one of claims 7-9 in transformers, inductor cores, relays, RFID antennas, high-frequency sensors, and wireless charging.