JP7108258B2 - Iron nitride magnetic material - Google Patents

Description

The present invention relates to novel iron nitride-based magnetic materials containing iron nitride Fe ₁₆ N ₂ .

Magnetic materials are used in various fields such as the electronic field, the automotive field, and the medical field, and various compounds and the like are used according to their uses. For example, various materials such as ferrite, permalloy, neodymium, samarium, and alnico are known.

Among these magnetic materials, iron nitride Fe ₁₆ N ₂ is expected to have a magnetization exceeding that of α-Fe, and is a ferromagnetic material that is attracting attention for its superior corrosion resistance compared to ordinary iron-based materials. is one. For this reason, Fe ₁₆ N ₂ -based magnetic materials are being developed in various fields.

For example, a magnetic powder containing at least iron and nitrogen as constituent elements and at least an Fe ₁₆ N ₂ phase, wherein the nitrogen content relative to iron is 1.0 to 20.0 atomic %, and the average particle long axis is An iron nitride-based magnetic powder characterized by having a spindle shape or a needle shape with a size in the range of 20 to 100 nm is known (Patent Document 1).

Further, for example, the Fe ₁₆ N ₂ phase is included, and in the particle size distribution, x% of the total number of particles having a particle size of 10 nm or more and 50 nm or less, and y of the total particles having a particle size of 100 nm or more and 200 nm or less %, x is 30≦x≦70, y is 30≦y≦70, and x and y are 60≦x+y≦100. Proposed (Patent Document 2)

Furthermore, the iron nitride powder containing Fe ₁₆ N ₂ as a main component has at least one element selected from the group consisting of rare earth metal elements, aluminum and silicon and (Co _X Fe _{1- X} ) An iron nitride powder having a coating layer containing cobalt-containing ferrite having a composition represented by Fe ₂ O ₄ (0<x≦1) has been proposed (Patent Document 3).

JP 2004-319923 JP 2016-17199 JP 2009-88287

As described above, Fe ₁₆ N ₂ -based magnetic materials have been extensively researched and developed, but there is still room for improvement in terms of coercive force. In other words, if the coercive force of the Fe ₁₆ N ₂ -based magnetic material can be further enhanced, further expansion of applications can be expected. In this regard, a method of doping iron nitride Fe ₁₆ N ₂ with a third element is also conceivable, but at present, high coercive force cannot be obtained even by doping with a third element.

SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide a Fe ₁₆ N ₂ -based magnetic material capable of exhibiting a higher coercive force.

As a result of intensive research in view of the problems of the prior art, the inventors have found that a material having a specific composition and configuration can achieve the above-mentioned objects, and have completed the present invention.

That is, the present invention relates to the following iron nitride-based magnetic material.
1. A magnetic material containing an iron nitride-based material,
As the iron nitride-based material,
a) (Fe _16-m X _m )N ₂ having an average primary particle size of 10 to 200 nm (where X represents at least one element that can be substituted at the Fe site, and m is 0≦m≦5 and a first powder containing
b) a primary particle containing R ₂ Fe ₁₇ N _n (where R represents at least one rare earth element and n satisfies 0<n≦3) having an average primary particle size of 0.3 to 500 μm; 2. An iron nitride-based magnetic material characterized by containing 2 powders.
2. X is at least one of Ge, Ga, Al, Si, V, Ti, Cr, Mn, Ni, Co, Zn, W, Mo, Pt, Rh, Pd, Ru, Y, Sc, Zr and Ce 2. The iron nitride-based magnetic material according to item 1 above.
3. 2. The iron nitride-based magnetic material according to item 1, wherein R is at least one of Sm, Ce, Nd and Dy.
4. Item 1. The iron nitride system according to Item 1, wherein the weight ratio of the first powder is 5 to 95 parts by weight and the second powder is 95 to 5 parts by weight when the total of the first powder and the second powder is 100 parts by weight. magnetic material.
5. The iron nitride-based magnetic material according to any one of claims 1 to 4, which is a compact.
6. 6. The iron nitride-based magnetic material according to item 5, wherein the powder compact is a magnetically anisotropic compact.

_ADVANTAGE OF THE INVENTION According to this invention, the _Fe16N2 system magnetic material which can exhibit higher coercive force can be provided. More specifically, in the material of the present invention, by using a mixed powder (especially a composite material) of a first powder having a relatively small particle size and a second powder having a relatively large particle size, a high coercive force and a It is possible to obtain physical properties that combine the characteristics of the first powder and the characteristics of the second powder.

The material of the present invention having such characteristics can also be used as a substitute for conventional hard magnetic materials, for example in the form of powder or green compact (molding).

The magnetic hysteresis loop of each sample obtained in Test Example 1 is shown. The magnetization curve of each sample obtained in Test Example 2 is shown. 3 shows the result of examining the relationship between the ratio of the first powder and the second powder and the magnetization in Test Example 3. In Test Example 4, the results of examining the relationship between the ratio of the first powder and the second powder and the coercive force are shown. 5 shows the results of an examination of the relationship between the ratio of the first powder to the second powder and the maximum energy product (BH)max in Test Example 5. FIG. 2 shows the results of an examination of the temperature dependence in a high temperature range of the magnetic properties of the materials of the present invention (FN 20% by weight and SFN 80% by weight). 2 shows the result (SEM image) of the material of the present invention (FN 20% by weight and SFN 80% by weight) observed with a scanning electron microscope. The magnetic hysteresis loop of measurement sample g obtained in Test Example 8 is shown. The magnetic hysteresis loop of the measurement sample h obtained in Test Example 8 is shown. The magnetic hysteresis loop of measurement sample i obtained in Test Example 8 is shown. Measurement material j magnetic hysteresis loop obtained in Test Example 8 is shown. The magnetic hysteresis loop of measurement sample k obtained in Test Example 8 is shown. The magnetic hysteresis loop of measurement sample 1 obtained in Test Example 8 is shown.

1. Iron Nitride-Based Magnetic Material The iron nitride-based magnetic material of the present invention (the material of the present invention) is a magnetic material containing an iron nitride-based material,
As the iron nitride-based material,
a) (Fe _16-m X _m )N ₂ having an average primary particle size of 10 to 200 nm (where X represents at least one element that can be substituted at the Fe site, and m is 0≦m≦5 and a first powder containing
b) a primary particle containing R ₂ Fe ₁₇ N _n (where R represents at least one rare earth element and n satisfies 0<n≦3) having an average primary particle size of 0.3 to 500 μm; 2 powder.

As the first powder, a powder containing (Fe _16-m X _m )N ₂ (where X represents at least one element that can be substituted at the Fe site, and m satisfies 0≦m≦5) is used. . That is, a powder containing at least one of 1) iron nitride Fe ₁₆ N ₂ and 2) a compound whose Fe site is replaced by another element is used.

Such a powder itself can be a known or commercially available one, or can be prepared according to a known synthesis method. In addition, although it is most desirable that the content of the (Fe _16-m X _m )N ₂ component in the first powder is 100% by volume, other components (other crystals equivalent) may be included. Generally, the content can be 80 to 100% by volume, preferably 90 to 100% by volume, more preferably 95 to 100% by volume.

Elements that substitute the Fe site are not particularly limited, but in the present invention, Ge, Ga, Al, Si, V, Ti, Cr, Mn, Ni, Co, Zn, W, Mo, Pt, Rh, Pd, It is preferably at least one of Ru, Y, Sc, Zr and Ce, and more preferably at least one of Ge, Ga, Ti, Cr, Mn, Ni, Co, Zn, W, Mo and Rh. preferable.

Also, the value of m is usually 0-5. That is, in addition to a composition (Fe ₁₆ N ₂ ) in which the Fe site is not substituted, a composition in which the Fe site is substituted can also be employed. When the Fe site is substituted, 0<m≦5, preferably 1.5-5. This also makes it possible to further stabilize the crystal structure.

The primary particles of the first powder generally have an average particle size of 10 to 200 nm, preferably 30 to 180 nm. By setting the particle size within such a range, it is possible to secure a state in which the particles constituting the first powder surround or cover the larger particles of the second powder, resulting in desired magnetic properties. can be demonstrated. The above average particle size can also be appropriately adjusted by known classification treatment, pulverization treatment, production conditions, and the like.

The average particle size of the primary particles is the digital image data obtained by observing the first powder with a transmission electron microscope "JEM-1400" manufactured by JEOL Ltd., and the digital image data is obtained using "iTEM 5.2" manufactured by PLYMPUS. 120 particle sizes were measured and analyzed, and the arithmetic mean value was obtained.

As the second powder, R ₂ Fe ₁₇ N _n having an average primary particle size of 0.3 to 500 μm (where R represents at least one rare earth element and n satisfies 0<n≦3). Use a powder containing

Such a powder itself can be a known or commercially available one, or can be prepared according to a known synthesis method. In addition, it is most desirable that the content of the R ₂ Fe _{17 Nn} component in the second powder is 100% by volume, but other components (such as other crystal phases) may be included within a range that does not interfere with the effects of the present invention. It's okay if it is. For example, various components for magnetic separation between particles such as a component for stabilizing the R ₂ Fe _{17 Nn} crystal phase and a surface modifier may be included. Generally, the content is 80 to 100% by volume, preferably 90 to 100% by volume, more preferably 95 to 100% by volume.

R is not particularly limited as long as it is a rare earth element. Examples include various elements such as La, Ce, Sm, Pr, Nd, Dy, Eu, Tb, Gd, Er, Ho, Yb, and Lu. It is desirable to have In particular, it is preferable to select a material having a composition in which R is combined so that the effects of the present invention can be maximized. As a result, the R ₂ Fe _{17 Nn} phase can be stabilized, and desired magnetic properties can be obtained more reliably. Therefore, as the second powder, for example, a powder containing Sm ₂ Fe ₁₇ N ₃ can be preferably used.

The value of n is usually 0<n≦3, but preferably 2≦n≦3. Thereby, desired magnetic properties (particularly high coercive force properties) can be obtained.

The average particle size of the primary particles of the second powder is usually 0.3-500 μm, preferably 0.5-100 μm. By setting the particle size within such a range, it is possible to secure a state in which the particles constituting the first powder surround or cover the larger particles of the second powder, resulting in desired magnetic properties. can be demonstrated. In particular, as shown in FIG. 7 described later, it is desirable to form composite particles in which the particles of the second powder are attached to the surfaces of the particles of the first powder and integrated. The above average particle diameter can also be appropriately adjusted by known classification treatment, pulverization treatment, and the like.

Regarding the average particle size of the primary particles, the digital image data obtained by observing the second powder with a Schottky field emission scanning electron microscope "JSM-7800F" manufactured by JEOL Ltd. is converted to "iTEM5.2" manufactured by PLYMPUS. The particle diameters of 120 arbitrary particles were measured and analyzed, and the arithmetic mean value was taken as the average particle diameter.

The ratio of the first powder and the second powder in the material of the present invention can be appropriately set according to the application, desired magnetic properties, etc., but usually the total of the first powder and the second powder is 100 parts by weight, It is preferable that the weight ratio of the first powder is 5 to 95 parts by weight and the second powder is 95 to 5 parts by weight. More preferably, the first powder is 10 to 85 parts by weight and the second powder is 90 to 15 parts by weight.

In addition, although the ratio of the total content of the first powder and the second powder in the material of the present invention is not limited, it is usually 80 to 100% by weight, particularly 85 to 100% by weight, in the material of the present invention. 90 to 100% by weight is more preferable. Therefore, the ratio of the total content of the first powder and the second powder in the material of the present invention can be set at 100% by weight, for example.

The material of the present invention may contain other components as long as the effects of the present invention are not impaired. For example, components such as colorants, lubricants, sintering aids, resin binders and dispersants may be added.

As for the form of the material of the present invention, in addition to being in the form of powder, it may be in the form of green compact (molding) as long as the crystal phase constituting the powder of the present invention is maintained. An example of the green compact of the present invention is one that is produced without applying an external magnetic field, but is not limited to this. For example, a green compact magnetically oriented by applying an external magnetic field may be used. These may be appropriately selected in accordance with the application or the like.

In the case of forming a powder compact, the powdered material of the present invention may be molded by a known molding method (for example, press molding (cold/hot), cast molding, injection molding, roller molding, etc.). In this case, the green compact may also contain components other than the materials of the present invention within a range that does not impair the effects of the present invention. For example, as a resin binder added for molding the compact, a thermosetting resin such as an epoxy resin or a phenolic resin is added in the range of 5% by weight or less (preferably in the range of 0.1 to 3% by weight). May be included.

The characteristics of the material of the present invention (especially the green compact) include, for example, those having the following magnetic characteristics. When the material of the present invention functions as an isotropic magnet, the coercive force Hc is usually in the range of 1.5-20 kOe, preferably 5-20 kOe. The residual magnetization Mr is usually in the range of 180-350 emu/cm ³ , preferably 220-350 emu/cm ³ . On the other hand, when the material of the present invention functions as an anisotropic magnet, the coercive force Hc is usually in the range of 2000-20000 Oe, preferably 2500-20000 Oe. The residual magnetization Mr is usually in the range of 350-700 emu/cm ³ , preferably 400-700 emu/cm ³ .

2. Method for Producing Iron Nitride-Based Magnetic Material The material of the present invention can be produced by a method including the step of mixing the first powder and the second powder. Both powders are mixed as uniformly as possible. The method is not particularly limited, and can be carried out using known devices such as mixers and kneaders.

Both powders may be mixed by dry mixing or wet mixing. In addition, dry mixing in the present invention refers to mixing under conditions in which no liquid is used. Wet mixing refers to mixing in a non-aqueous system (in the presence of an organic solvent).

When the material of the present invention is used as a compact, the powdered material of the present invention can be molded by a known molding method (for example, press molding (cold/hot), cast molding, injection molding, roller molding, etc.). Good luck. In this case, a resin binder can also be used. The resin binder is not particularly limited, but thermosetting resins (powder) such as epoxy resins and phenol resins can be suitably used. The amount of the resin binder to be added can be appropriately set according to the type of resin binder used, etc., but it is usually within the range of 5% by weight or less (preferably within the range of 0.1 to 3% by weight). By blending such a resin binder in the amount described above, a green compact can be produced more reliably and efficiently. A material for molding can be prepared by mixing the powdered inventive material with a resin binder in the absence of water. When adding a resin binder, it is possible to add a powdery resin binder as it is. ) can be mixed with the powdered present material.

When mixing the powdery material of the present invention and the paste, it is sufficient if they can be uniformly mixed. It is preferably powdered. This makes it possible to more reliably obtain a molded article having a desired molded article density.

Also, the powdery inventive material and the paste can be mixed in a magnetic field. This makes it easier to obtain a magnetic orientation state. Although the strength of the magnetic field in this case is not limited, it is usually about 0.2 to 1.5T.

Molding conditions are not particularly limited. Although the molding pressure is not particularly limited, it is usually about 0.1 to 25 tonf/cm ² , preferably 0.2 to 20 tonf/cm ² . The atmosphere for molding may be the air, but it is preferable to carry out the molding process in an inert atmosphere or in a vacuum so as not to oxidize the first powder and the second powder. The molding temperature is not critical, and may be room temperature, for example. The molding temperature, particularly when a resin binder is contained, is usually about 70 to 250.degree. C., preferably 80 to 200.degree. The atmosphere may be the air, but is preferably a substantially non-oxidizing atmosphere.

In molding, if the green compact is produced without applying an external magnetic field during molding, a magnetically isotropic green compact can be obtained. On the other hand, when a green compact is produced while applying an external magnetic field during molding, a magnetically anisotropic green compact (anisotropic magnet) can be obtained. That is, by molding while applying an external magnetic field, the magnetic properties of the obtained green compact can be made anisotropic.

When applying an external magnetic field, it may be carried out according to a known method. For example, it can be carried out using a commercially available magnetic field generator. In addition, a press-molding device in a magnetic field having both a magnetic field orientation function and a molding function can be used. The strength of the external magnetic field when applying the external magnetic field is not particularly limited, and should normally be 0.2 T or more. The upper limit may be set to the upper limit of the magnetic field generator or the like to be used, generally about 7T, particularly about 5T. Also, the time for which the external magnetic field is applied (holding time) is not particularly limited, and may be appropriately set within a range of about 1 to 60 minutes, usually depending on the size of the green compact. The direction of the external magnetic field may be in only one direction, but depending on the situation, the magnetic field may be applied in the opposite direction. Alternatively, these operations may be combined to perform the reversing operation a plurality of times.

The temperature at the time of powder compaction is not particularly limited, and for example, the optimal temperature for the compounding composition of the first powder and the second powder of the compact and the resin to be used may be selected. Therefore, the temperature may be, for example, room temperature (20° C.) to about 150° C., but is not limited to this.

3. Use of Iron Nitride-Based Magnetic Material The material of the present invention can be applied to the same uses as ordinary hard magnetic materials. In particular, the material of the present invention is suitable for various applications such as generators such as direct drive wind power generators, motors for reproducing and recording devices such as VCM, video, CD, DVD, etc., and motors for home appliances and automobile equipment. can be used.

EXAMPLES Examples are given below to more specifically describe the features of the present invention. However, the scope of the present invention is not limited to the examples.

In this example, the average particle size of particles, the magnetic hysteresis loop, etc. were measured as follows.

(1) Measurement of average particle size and particle surface oxide film thickness The sample is measured with a transmission electron microscope JEM-1400 manufactured by JEOL Ltd. or a Schottky field emission scanning electron microscope JSM-7800F manufactured by JEOL Ltd. The observed digital image data was measured, analyzed and calculated for the particle size of 120 arbitrary particles using "iTEM5.2" manufactured by PLYMPUS.

(2) Hysteresis loop Using a physical property measurement system with a vibrating sample magnetometer manufactured by Nippon Quantum Design Co., Ltd., the MH hysteresis loop was measured under the conditions of −50000 to 50000 Oe and 300 K, and the saturation magnetization was measured. and coercive force.

(3) Determination of purity of sample powder XRD measurement was performed with a D8 ADVANCE manufactured by Bruker AXS Co., Ltd., and the data was used to determine the fraction of the generated phase using TOPAS analysis software manufactured by the same company.

Example 1
In a glove box filled with argon gas and having a dew point of 0 ° C. DP or less (oxygen concentration of 1000 ppm or less), Fe ₁₆ N ₂ powder (average primary particle diameter 48 nm, purity 90%, hereinafter “FN”) was used as the first powder. ), and Sm ₂ Fe ₁₇ N ₃ powder (primary particle average particle size 8 μm, purity 100%, hereinafter also referred to as “SFN”) as the second powder, and both powders are mixed at a predetermined ratio. These were weighed out and uniformly dry-mixed and pulverized in a glove box with an agate mortar and mortar machine to prepare 3 g as the total amount of the mixed powder.
For the powder (comparative sample) consisting of either FNS or FN alone, the powder was uniformly dry ground and mixed in a glove box with an agate mortar Raikai machine to obtain a total powder amount of 3 g. prepared.
Next, using the mixed powder obtained in the same glove box and the comparative sample, a green compact was produced. More specifically, a paste was prepared by dissolving 0.2 g of a liquid highly viscous thermosetting resin (epoxy resin) as a resin binder in 3 mL of acetone. While the paste was added to the mixed powder prepared above and mixed, acetone was evaporated to obtain a powdery mixture. This mixture was filled into a mold (7 mm square, split) placed in the same glove box and press-molded at a molding pressure of 1.5 tonf/cm ² and a temperature of 100° C. to obtain a rectangular solid. . A piece (approximately 0.5 g) of the resulting green compact was collected and used as a measurement sample.

Test example 1
The hysteresis loops of the measurement samples a to f obtained in Example 1 were determined. The results are shown in FIG.
In addition, in FIG. 1, the relationship between the measurement sample and the mixing ratio is as follows.
Measurement sample a: SFN/FN = 0% by weight/100% by weight (comparative sample)
Measurement sample b: SFN/FN=20% by weight/80% by weight
Measurement sample c: SFN/FN = 40% by weight/60% by weight
Measurement sample d: SFN/FN = 50% by weight/50% by weight
Measurement sample e: SFN/FN = 80% by weight/20% by weight
Measurement sample f: SFN/FN=100% by weight/0% by weight (comparative sample)

Test example 2
The magnetization curves of the measurement samples a to f obtained in Example 1 were obtained. The results are shown in FIG. 2, respectively.
In addition, in FIG. 2, the relationship between the measurement sample and the mixing ratio is as follows.
Measurement sample a: SFN/FN = 0% by weight/100% by weight (comparative sample)
Measurement sample b: SFN/FN=20% by weight/80% by weight
Measurement sample c: SFN/FN = 40% by weight/60% by weight
Measurement sample e: SFN/FN = 80% by weight/20% by weight
Measurement sample f: SFN/FN=100% by weight/0% by weight (comparative sample)

Test example 3
The relation between the mixing ratio (FN content) and the magnetization was examined for measurement samples prepared in the same manner as in Example 1 by changing the mixing ratio of the first powder and the second powder. The results are shown in FIG.

Test example 4
Relationship between the mixing ratio (FN content) and the coercive force (coercive force Hc and remanent magnetization Mr) of measurement samples prepared in the same manner as in Example 1 by changing the mixing ratio of the first powder and the second powder. investigated. The results are shown in FIG.

Test example 5
The relationship between the mixing ratio (FN content) and the maximum energy product (BH)max was examined for measurement samples prepared in the same manner as in Example 1 by changing the mixing ratio of the first powder and the second powder. The results are shown in FIG.

Test example 6
The temperature dependence of the magnetic properties of the measurement sample e was investigated. The results are shown in FIG. Temperatures were set at 350K, 450K and 550K.

Test example 7
FIG. 7 shows the result of observing the cross section of the molded body of the measurement sample e by the SEM. In FIG. 7, the SFN particles are of submicron order as indicated by symbol A, and the small particles adhering to the surface of the SFN particles like moss are FN particles (particles indicated by symbol B). The material of the present invention may be a simple mixed powder of FN particles and SFN particles, but as shown in FIG. Also good.

As is clear from these results, in the material of the present invention, intermediate properties between FN and SFN are ensured by blending FN and SNF in which the average particle size of the primary particles is controlled within a specific range. It can be seen that That is, it can be seen that a coercive force higher than that of FN can be obtained, and the original characteristics of FN (high magnetization, etc.) can also be obtained. Therefore, the material of the present invention is expected to develop new applications utilizing the properties of both.

Example 2
A mixed powder was prepared in the same manner as in Example 1, except that FN and SFN were mixed so as to have the composition shown in Table 1.
As for the powder (comparative sample) consisting only of FN, the total amount of 3 g was prepared by uniformly dry pulverizing and mixing FN powder in a glove box with an agate mortar and mortar machine.
Next, using the mixed powder obtained in the same glove box or a comparative sample, a green compact was produced. More specifically, a paste was prepared by dissolving 0.2 g of a liquid highly viscous thermosetting resin (epoxy resin) as a resin binder in 3 mL of acetone. In an atmosphere in which an external magnetic field of 2.0 T was applied in a glove box, the paste was added to the mixed powder prepared above or the comparative sample and mixed while acetone was evaporated to obtain a powdery mixture. . This mixture was filled into a mold (7 mm square, split) placed in the same glove box, and the mixture was molded under conditions of a molding pressure of 20.5 tonf/cm ² , a temperature of about 24° C., and an external magnetic field of 2.6 T for 3 minutes. Predetermined rectangular parallelepiped compacts (measurement samples g, h, i, j) were obtained by press molding. Table 2 shows the size, density, etc. of the green compacts obtained.

Example 3
Same as Example 2, except that the composition shown in Table 1 was adopted, and the molding was performed for 10 minutes under the conditions of a molding pressure of 10 tonf/cm ² , a temperature (about 80° C.), and an external magnetic field of 2.6 T. Predetermined cuboid compacts (measurement samples k and l) were obtained in the same manner. Table 2 shows the size, density, etc. of the green compacts obtained.

Test example 8
The magnetic properties (saturation magnetization Ms, residence time Mr, etc.) of the powder compacts (measurement samples g to l) obtained in Examples 2 and 3 were examined. Table 2 shows the results. Also, the hysteresis loops of each green compact (measurement samples g to l) are shown in FIG. 8 (measurement data g), FIG. 9 (measurement data h), FIG. 12 (measurement data k) and to FIG. 13 (measurement data l). "A" of each hysteresis loop indicates the axis of easy magnetization, and "B" indicates the axis of hard magnetization. In FIG. 8, the axis of easy magnetization and the axis of hard magnetization are substantially aligned, and magnetic orientation is hardly obtained.

As is clear from these results, the powder compact of the present invention exhibits unique physical properties that cannot be obtained with SFN or FN alone.

Claims (6)

A magnetic material containing an iron nitride-based material,
(1) As the iron nitride-based material,
a) (Fe _16-m X _m )N ₂ having an average primary particle size of 10 to 200 nm (where X represents at least one element that can be substituted at the Fe site, and m is 0≦m≦5 satisfying.) , the content of which is 90 to 100% by volume , and
b) R ₂ Fe17N _n having an average primary particle size of 0.3 to 500 μm (where R represents at least one rare earth element and n satisfies 0<n≦3), and a second powder having a content of 95 to 100% by volume ;
(2) a thermosetting resin;
An iron nitride-based magnetic material comprising: X is at least one of Ge, Ga, Al, Si, V, Ti, Cr, Mn, Ni, Co, Zn, W, Mo, Pt, Rh, Pd, Ru, Y, Sc, Zr and Ce The iron nitride-based magnetic material according to claim 1, wherein 2. The iron nitride-based magnetic material according to claim 1, wherein said R is at least one of Sm, Ce, Nd and Dy. The iron nitride system according to claim 1, wherein the weight ratio of the first powder is 5 to 95 parts by weight and the second powder is 95 to 5 parts by weight, assuming that the total of the first powder and the second powder is 100 parts by weight. magnetic material. The iron nitride-based magnetic material according to any one of claims 1 to 4, which is a powder compact. 6. The iron nitride-based magnetic material according to claim 5, wherein the powder compact is a magnetically anisotropic compact.

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