阅读说明：本技术 一种铁镍基非晶软磁合金磁粉芯材料及其制备方法 (Iron-nickel-based amorphous soft magnetic alloy magnetic powder core material and preparation method thereof ) 是由 邓毕力 徐敏义 罗顶飞 潘振海 王玉川 于 2020-12-21 设计创作，主要内容包括：本发明提供一种铁镍基非晶软磁合金磁粉芯材料及其制备方法,磁芯材料具有以下分子式：Fe-aNi-bM-cB-dC-eCu-f,a+b+c+d+f＝100,M元素为Nb、Co、Cr、La中的一种或几种,磁芯材料外还具有纳米BaTiO-3层,所述纳米BaTiO-3层外采用化学气象沉积一层聚对二甲苯薄膜。所述纳米BaTiO-3层中的纳米BaTiO-3的粒径为15nm～30nm,所述纳米BaTiO-3层的厚度为5mm～10mm。本发明提供的磁粉芯材料具有0.8T～1.2T饱和磁感强度以及较高的初始磁导率和优异的最大磁导率、机械强度和韧性；在中低频率下具有较低的磁损率；在空气中进行热处理时不会发生氧化,且绝缘性良好。(The invention provides an iron-nickel based amorphous soft magnetic alloy magnetic powder core material and a preparation method thereof, wherein the magnetic core material has the following molecular formula: fe a Ni b M c B d C e Cu f A + b + c + d + f is 100, M element is one or several of Nb, Co, Cr and La, and the magnetic core material is also provided with nano BaTiO 3 Layer of said nano BaTiO 3 And a layer of parylene film is deposited outside the layer by adopting chemical vapor deposition. The nano BaTiO 3 Nano-sized BaTiO in a layer 3 The particle diameter of the nano BaTiO is 15nm to 30nm 3 The thickness of the layer is 5mm to 10 mm. The magnetic powder core material provided by the invention has the saturated magnetic induction strength of 0.8T-1.2T, higher initial permeability and excellent maximum permeability, mechanical strength and toughness; the magnetic loss rate is lower at medium and low frequency; the insulation material is free from oxidation when heat-treated in air and has good insulation properties.)

1. The iron-nickel-based amorphous soft magnetic alloy magnetic powder core material is characterized by having the following molecular formula: fe_aNi_bM_cB_dC_eCu_fA + b + c + d + f is 100, and the M element is Nb, Co, Cr and LaThe magnetic core material is also provided with nano BaTiO₃Layer of said nano BaTiO₃Outside the layer, a layer of parylene film with the thickness of 3-7 mu m is deposited by adopting chemical vapor.

2. The iron-nickel based amorphous soft magnetic alloy magnetic powder core material as claimed in claim 1, wherein the atomic percentage of Fe is 38 ≤ a ≤ 45.

3. The iron-nickel based amorphous soft magnetic alloy magnetic powder core material as claimed in claim 1, wherein the Ni atom percentage is 30 ≤ a ≤ 42.

4. The iron-nickel based amorphous soft magnetic alloy magnetic powder core material as claimed in claim 1, wherein the atomic percentage of M is 10 ≤ c ≤ 15.

5. The iron-nickel based amorphous soft magnetic alloy magnetic powder core material as claimed in claim 1, wherein the atomic percentage of B is 5 ≤ d ≤ 7.

6. The iron-nickel based amorphous soft magnetic alloy magnetic powder core material as claimed in claim 1, wherein the atomic percentage of C is 1 ≤ e ≤ 3.

7. The iron-nickel based amorphous soft magnetic alloy magnetic powder core material as claimed in claim 1, wherein the atomic percentage of Cu is 0.45 ≤ f ≤ 0.10.

8. The iron-nickel based amorphous soft magnetic alloy magnetic powder core material as claimed in claim 1, wherein the nano BaTiO is₃Nano-sized BaTiO in a layer₃The particle diameter of the nano BaTiO is 15nm to 30nm₃The thickness of the layer is 5mm to 10 mm.

9. The iron-nickel based amorphous soft magnetic alloy magnetic powder core material according to claim 1, wherein the magnetic powder core material has a saturation induction of 0.8T to 1.2T.

10. The method for preparing an iron-nickel based amorphous soft magnetic alloy magnetic powder core material according to any one of claims 1 to 9, comprising the steps of:

1) according to said formula Fe_aNi_bM_cB_dC_eCu_fThe iron-nickel based amorphous soft magnetic alloy magnetic core component is proportioned, the proportioned mixture is smelted into molten steel, the temperature of the molten steel is adjusted to 180-350 ℃, and the liquid level height of the molten steel is enabled to be 700-800 mm;

2) carrying out spraying and rapid quenching on the molten steel obtained in the step 1) by adopting a single copper roller at the speed of 25-35 m/s to cool the molten steel to obtain the Fe-Ni-based amorphous alloy thin strip, wherein the distance between a nozzle used for spraying and the single copper roller is 150-180 mu m;

3) heating the Fe-Ni-based amorphous alloy ribbon obtained in the step 2) to 200-300 ℃, and then mixing with the nano BaTiO₃Wrapping the surface of the heated iron-nickel base amorphous alloy thin strip, and limiting the nanometer BaTiO by adopting a mould₃Thickness of the layer to obtain a layer having nano-BaTiO₃A magnetic core material of the layer;

4) the nano BaTiO obtained in the step 3)₃The magnetic core material of the layer is coupled by adopting silane coupling agent, then a layer of parylene film with the thickness of 3-7 mu m is deposited by adopting a chemical vapor deposition method, and the nano BaTiO coated with the parylene insulation film is formed₃The iron-nickel based amorphous soft magnetic alloy magnetic powder core material of the layer.

Technical Field

The invention belongs to the technical field of magnetic materials, and particularly relates to an iron-nickel-based amorphous soft magnetic alloy magnetic powder core material and a preparation method thereof.

Background

Magnetism is one of the most basic physical properties of substances, is generally present among various substances, and is diverse, so that magnetic materials are widely researched and applied by people. Magnetic materials are classified into soft magnetic materials, permanent magnetic materials and functional magnetic materials according to their use purposes, and soft magnetic materials are classified into conventional soft magnetic materials and novel soft magnetic materials. Traditional soft magnetic materials include pure iron, silicon steel, permalloy and soft magnetic ferrite; the novel soft magnetic material comprises amorphous soft magnetic alloy, nanocrystalline soft magnetic alloy and soft magnetic composite material. The amorphous nanocrystalline soft magnetic material has excellent comprehensive soft magnetic properties, comprises the advantages of high saturation magnetization, low coercive force, high magnetic conductivity, low loss and the like, meets the modern social green, energy-saving, environment-friendly and efficient era requirements, is one of new industries for strategic and continuous development in China, is widely applied to various industries in society, and is mainly applied to high and new technical fields of power electronics, electronic information and the like. With the development and progress of these high and new technology fields, more stringent requirements are put on soft magnetic materials, and the materials are required to be capable of high frequency, large current, miniaturization, integration and lower cost. Therefore, an iron-nickel-based amorphous soft magnetic alloy magnetic powder core material with low magnetic loss rate, strong saturation magnetic induction strength, good insulativity, mechanical strength and good toughness is urgently needed.

Disclosure of Invention

Aiming at the defects, the invention provides the iron-nickel-based amorphous soft magnetic alloy magnetic powder core material with 0.8T-1.2T saturated induction strength, higher initial permeability and excellent maximum permeability, mechanical strength and toughness and the preparation method thereof.

The invention provides the following technical scheme: an iron-nickel based amorphous soft magnetic alloy magnetic powder core material, the magnetic core material having the following molecular formula: fe_aNi_bM_cB_dC_eCu_fThe a + b + c + d + f is 100, the M element is one or more of Nb, Co, Cr and La, and the magnetic core material is also provided with nano BaTiO₃Layer of said nano BaTiO₃Outside the layer, a layer of parylene film with the thickness of 3-7 mu m is deposited by adopting chemical vapor.

Furthermore, the percentage content of the Fe atom is more than or equal to 38 and less than or equal to 45.

Furthermore, the percentage content of the Ni atoms is more than or equal to 30 and less than or equal to 42.

Furthermore, the atomic percentage of M is more than or equal to 10 and less than or equal to 15.

Furthermore, the atomic percentage of the B is that d is more than or equal to 5 and less than or equal to 7.

Furthermore, the atomic percentage content of C is more than or equal to 1 and less than or equal to 3.

Further, the atomic percentage of the Cu is more than or equal to 0.45 and less than or equal to 0.10.

Further, the nano BaTiO₃Nano-sized BaTiO in a layer₃The particle diameter of the nano BaTiO is 15nm to 30nm₃The thickness of the layer is 5mm to 10 mm.

Further, the magnetic powder core material has a saturation induction density of 0.8T to 1.2T.

The invention also provides a preparation method of the iron-nickel-based amorphous soft magnetic alloy magnetic powder core material, which comprises the following steps:

1) according to said formula Fe_aNi_bM_cB_dC_eCu_fThe iron-nickel based amorphous soft magnetic alloy magnetic core component is proportioned, the proportioned mixture is smelted into molten steel, the temperature of the molten steel is adjusted to 180-350 ℃, and the liquid level height of the molten steel is enabled to be 700-800 mm;

2) carrying out spraying and rapid quenching on the molten steel obtained in the step 1) by adopting a single copper roller at the speed of 25-35 m/s to cool the molten steel to obtain the Fe-Ni-based amorphous alloy thin strip, wherein the distance between a nozzle used for spraying and the single copper roller is 150-180 mu m;

3) heating the Fe-Ni-based amorphous alloy ribbon obtained in the step 2) to 200-300 ℃, and then mixing with the nano BaTiO₃Wrapping the surface of the heated iron-nickel base amorphous alloy thin strip, and limiting the nanometer BaTiO by adopting a mould₃Thickness of the layer to obtain a layer having nano-BaTiO₃A magnetic core material of the layer;

4) the nano BaTiO obtained in the step 3)₃The magnetic core material of the layer is coupled with a silane coupling agent, howeverThen depositing a layer of parylene film with the thickness of 3-7 mu m by adopting a chemical vapor deposition method to form the nano BaTiO coated with the parylene insulating film₃The iron-nickel based amorphous soft magnetic alloy magnetic powder core material of the layer.

The invention has the beneficial effects that:

1. the molecular formula provided by the invention is Fe_aNi_bM_cB_dC_eCu_fThe Fe-Ni based amorphous magnetically soft alloy magnetic powder core material ensures that the atomic percentage of Fe is 38-45 and the atomic percentage of Ni is 30-42, increases the contents of Fe and Ni, and further ensures that the finally obtained magnetically soft alloy magnetic powder core material has 0.8T-1.2T saturated magnetic induction strength, higher initial magnetic conductivity, excellent maximum magnetic conductivity, mechanical strength and toughness.

2. The application is realized by wrapping nano BaTiO outside a magnetic powder core material₃Nano-sized BaTiO in a layer₃Is a strong dielectric compound material with high dielectric constant and low dielectric loss, so the molecular formula obtained by self preparation of the application is Fe_aNi_bM_cB_dC_eCu_fThe magnetic powder core material has lower magnetic loss rate at medium and low frequency.

3. The invention wraps a layer of parylene insulating layer on the outermost layer, so that the wrapped nano BaTiO with good penetrating power of the parylene active molecules₃Forming a transparent insulating coating with uniform thickness and no pinholes on the inner part and the bottom of the magnetic core material of the layer₃The magnetic core material of the layer provides a complete high-quality protective coating, the invasion of acid-base, salt spray, mould and various corrosive gas pieces can be resisted, the finally obtained magnetic core material can be prevented from being oxidized when being subjected to heat treatment in the air, and the insulating property is good.

Detailed description of the preferred embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The embodiment provides an iron-nickel base amorphous soft magnetic alloy magnetic powder core material, and the magnetic core material has the following molecular formula: fe₄₀Ni₄₂Cr₁₀B₇C_0.9Cu_0.1The magnetic core material is also provided with nano BaTiO with the thickness of 5nm₃Layer of nano BaTiO₃And a layer of parylene film with the thickness of 3 mu m is deposited outside the layer by adopting chemical vapor deposition.

Nano BaTiO₃Nano-sized BaTiO in a layer₃Has a particle diameter of 15 nm.

The embodiment also provides a preparation method of the iron-nickel-based amorphous soft magnetic alloy magnetic powder core material, which comprises the following steps:

1) according to the formula Fe₄₀Ni₄₂Cr₁₀B₇C_0.9Cu_0.1The iron-nickel based amorphous soft magnetic alloy magnetic core is prepared, the prepared mixture is smelted into molten steel, the temperature of the molten steel is adjusted to 180 ℃, and the liquid level height of the molten steel is 700 mm;

2) cooling the molten steel obtained in the step 1) by adopting a single copper roller to carry out spraying and rapid quenching at the speed of 25m/s to obtain an iron-nickel-based amorphous alloy thin strip, wherein the distance between a spray nozzle used for spraying and the single copper roller is 150 mu m;

3) heating the Fe-Ni based amorphous alloy ribbon obtained in the step 2) to 200 ℃, and then mixing with nano BaTiO₃Wrapping the surface of the heated Fe-Ni-based amorphous alloy thin strip, and limiting the nanometer BaTiO by using a mold₃The thickness of the layer was 5mm, giving a layer with nano-BaTiO₃A magnetic core material of the layer;

4) the nano BaTiO obtained in the step 3)₃The magnetic core material of the layer is coupled by adopting silane coupling agent, and then a layer of parylene film with the thickness of 3 mu m is deposited by adopting a chemical vapor deposition method to form the nano BaTiO coated insulating film with the parylene₃The iron-nickel based amorphous soft magnetic alloy magnetic powder core material of the layer.

Through tests, the magnetic powder core material provided by the embodiment has the saturated magnetic induction intensity of 0.8T, the maximum magnetic permeability of 195mH/m and the resistivity of 120 multiplied by 10^-8Omega m, 47 Shore A mechanical strength, 12.4% elongation at break.

Example 2

The embodiment provides an iron-nickel base amorphous soft magnetic alloy magnetic powder core material, and the magnetic core material has the following molecular formula: fe₄₅Ni₃₀(Nb_0.3La_0.7)₁₅B₇C_2.55Cu_0.45The magnetic core material is also provided with nano BaTiO₃Layer of nano BaTiO₃The thickness of the layer is 8mm, nano BaTiO₃And a layer of parylene film with the thickness of 5 mu m is deposited outside the layer by adopting chemical vapor deposition. Nano BaTiO₃Nano-sized BaTiO in a layer₃Has a particle diameter of 22 nm.

The embodiment also provides a preparation method of the iron-nickel-based amorphous soft magnetic alloy magnetic powder core material, which comprises the following steps:

1) according to the formula Fe₄₅Ni₃₀(Nb_0.3La_0.7)₁₅B₇C_2.55Cu_0.45The iron-nickel based amorphous soft magnetic alloy magnetic core component is proportioned, the proportioned mixture is smelted into molten steel, and the temperature of the molten steel is adjusted to 260 ℃ so that the liquid level height of the molten steel is 750 mm;

2) cooling the molten steel obtained in the step 1) by adopting a single copper roller to carry out spraying and rapid quenching at the speed of 30m/s to obtain an iron-nickel-based amorphous alloy thin strip, wherein the distance between a spray nozzle used for spraying and the single copper roller is 165 mu m;

3) heating the Fe-Ni based amorphous alloy ribbon obtained in the step 2) to 250 ℃, and then mixing with nano BaTiO₃Wrapping the surface of the heated Fe-Ni-based amorphous alloy thin strip, and limiting the nanometer BaTiO by using a mold₃The thickness of the layer was 8mm, giving a layer with nano-BaTiO₃A magnetic core material of the layer;

4) the nano BaTiO obtained in the step 3)₃The magnetic core material of the layer is coupled by silane coupling agent, and then a layer of poly-p-di with the thickness of 5 mu m is deposited by chemical vapor deposition methodToluene film with nano BaTiO coated with insulating parylene film₃The iron-nickel based amorphous soft magnetic alloy magnetic powder core material of the layer.

Through tests, the magnetic powder core material provided by the embodiment has the saturation magnetic induction intensity of 1.05T, the maximum magnetic permeability of 213mH/m, and the resistivity of 132 multiplied by 10^-8Omega m, mechanical strength 52 Shore A, and elongation at break 12.6%.

Example 3

The iron-nickel-based amorphous soft magnetic alloy magnetic powder core material is characterized in that the magnetic core material has the following molecular formula: fe_41.5Ni₃₈(Nb_0.5Co_0.5)_12.5B₅C_2.725Cu_0.275The magnetic core material is also provided with a layer of nano BaTiO with the thickness of 10mm₃Layer of nano BaTiO₃And a layer of parylene film with the thickness of 7 mu m is deposited outside the layer by adopting chemical vapor deposition.

Nano BaTiO₃Nano-sized BaTiO in a layer₃Has a particle diameter of 17.5 nm.

The embodiment also provides a preparation method of the iron-nickel-based amorphous soft magnetic alloy magnetic powder core material, which comprises the following steps:

1) according to the formula Fe_41.5Ni₃₈(Nb_0.5Co_0.5)_12.5B₅C_2.725Cu_0.275The iron-nickel based amorphous soft magnetic alloy magnetic core is prepared, the prepared mixture is smelted into molten steel, the temperature of the molten steel is adjusted to 350 ℃, and the liquid level height of the molten steel is 800 mm;

2) cooling the molten steel obtained in the step 1) by adopting a single copper roller to carry out spraying and rapid quenching at the speed of 35m/s to obtain an iron-nickel-based amorphous alloy thin strip, wherein the distance between a spray nozzle used for spraying and the single copper roller is 180 mu m;

3) heating the Fe-Ni based amorphous alloy ribbon obtained in the step 2) to 300 ℃, and then mixing with nano BaTiO₃Wrapping the surface of the heated Fe-Ni-based amorphous alloy thin strip, and limiting the nanometer BaTiO by using a mold₃The thickness of the layer was 10mm, giving a layer with nano-BaTiO₃A magnetic core material of the layer;

4) will be provided withThe nano BaTiO obtained in the step 3)₃The magnetic core material of the layer is coupled by adopting silane coupling agent, and then a layer of parylene film with the thickness of 5 mu m is deposited by adopting a chemical vapor deposition method to form the nano BaTiO coated with the parylene insulating film₃The iron-nickel based amorphous soft magnetic alloy magnetic powder core material of the layer.

Through tests, the magnetic powder core material provided by the embodiment has the advantages of 1.2T of saturation magnetic induction intensity, 241mH/m of maximum magnetic permeability and 136 multiplied by 10 of resistivity^-8Omega m, mechanical strength 57 Shore A, elongation at break 13.5%.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.