Electromagnetic material and method for producing the same

Abstract

The present invention involves mixing a ferromagnetic material and a ferroelectric material, adding a main material and a curing agent to perform curing molding, wherein the composition ratio comprises 40.0 to 50.0 wt% silicon dioxide (SiO2), 26.0 to 32.0 wt% aluminum oxide (Al2O3), 3.5 to 4.5 wt% magnesium oxide (MgO), 3.5 to 4.5 wt% iron oxide (Fe2O3), 1.5 to 2.5 wt% quicklime (CaO), 0.5 to 1.0 wt% titanium dioxide (TiO2), 1.5 to 2.0 wt% potassium oxide (K2O), 2.5 to 3.0 wt% sodium oxide (Na2O), 0.15 to 0.20 wt% manganese oxide (MnO), and 0.03 to 0.07 wt% of The electromagnetic material comprises barium oxide (BaO), 0.003 to 0.008 wt% copper oxide (CuO), 5 wt% polyester, and the remainder being impurities, and a method for manufacturing the same.

Description

Technology Field

[0001] The present invention relates to an electromagnetic material and a method for manufacturing the same. Background Technology

[0003] Research is actively underway on material systems capable of controlling electrical properties with magnetic fields or magnetic properties with electric fields, as well as on application devices utilizing such material systems.

[0004] However, in conventional electromagnetic materials, electric polarization induced by a magnetic field occurs only at very low temperatures or when a very high magnetic field is applied at room temperature. Therefore, there were limitations in applying conventional electromagnetic materials to the field of electromagnetic materials at room temperature.

[0005] Accordingly, conventionally, as disclosed in Korean Registered Patent Publication No. 10-1537037, the method comprises the steps of: preparing a mixture of powders of barium carbonate, strontium carbonate, zinc oxide, iron oxide, aluminum oxide, and sodium oxide; heat-treating the mixed powders one or more times; and slow-cooling for crystallization after the heat-treatment step, wherein A2B2(Fe 1-x Al x It can be seen that an electromagnetic material and a method for manufacturing the same are disclosed, wherein a Y-type hexaferrite is prepared as represented by )12O22 (0 < x ≤ 0.8), and the Y-type hexaferrite comprises an S-block and an L-block having different magnetisms, and the ions located at the boundaries of each of the S-block and the L-block have the same magnetic spin alignment direction, and the element A is one or more of barium (Ba) and strontium (Sr), and the element B is one of zinc (Zn), cobalt (Co), and magnesium (Mg).

[0006] However, it was found that for electromagnetic materials such as those mentioned above, a specific heat treatment and slow cooling process is required, which incurs significant costs due to the heat treatment and causes complexity in the manufacturing method because it involves multiple steps in the processing.

[0007] To solve this problem, an electromagnetic material for use at room temperature was developed as Korean Patent Registration No. 10-1853793. However, as shown in Fig. 5, for example, after installing a molded electromagnetic material in contact with a stripped wire connection on January 15, 2023, the output response was found to decrease only around June 21, 2023. This is because the magnetization direction changes due to the electric field and the energy saving rate becomes 9.6% only after a typical response time of 100 to 150 days, so although it is usable, there is a problem that a response waiting time is required to produce an effect. The problem to be solved

[0009] The present invention aims to solve this problem. The objective of the present invention is to provide an electromagnetic material and a method for manufacturing the same, wherein a cubic molded body is made from a ferromagnetic material having both a ferroelectric and a ferromagnetic material, the silicon dioxide content among the components of the ferromagnetic material is reduced, and the amount of aluminum oxide is increased by the amount reduced, thereby further activating the magnetization polarization and dielectric polarization in the ferromagnetic material so that the time for the magnetization direction to change due to an electric field is shortened to 1 hour to 60 hours. means of solving the problem

[0011] The present invention relates to a method for manufacturing an electromagnetic material that enables magnetization by an electric field or control of electric polarization by a magnetic field by combining a ferromagnetic material having magnetic properties and a ferroelectric material having electrical properties, wherein

[0012] A manufacturing step (S11) for producing a ferromagnetic material comprising 53.48 wt% silicon dioxide (SiO2), 30.92 wt% aluminum oxide (Al2O3), 1.58 wt% magnesium oxide (MgO), 3.66 wt% iron oxide (Fe2O3), 1.24 wt% quicklime (CaO), 0.41 wt% titanium dioxide (TiO2), 2.82 wt% potassium oxide (K2O), 2.82 wt% sodium oxide (Na2O), 0.33 wt% manganese oxide (MnO), and 0.06 wt% barium oxide (BaO), and the remainder being impurities, wherein each ore is ground into a powder of 325 to 1000 mesh using a mill grinder and mixed;

[0013] A manufacturing step (S12) for producing a ferroelectric material comprising 38.1 wt% silicon dioxide (SiO2), 30.3 wt% aluminum oxide (Al2O3), 9.26 wt% magnesium oxide (MgO), 4.49 wt% iron oxide (Fe2O3), 1.29 wt% quicklime (CaO), 0.92 wt% titanium dioxide (TiO2), 0.38 wt% potassium oxide (K2O), 1.95 wt% sodium oxide (Na2O), 0.02 wt% manganese oxide (MnO), 0.01 wt% barium oxide (BaO), and 0.01 wt% copper oxide (CuO), and the remainder being impurities, wherein each ore is ground into a powder of 325 to 1000 mesh using a mill grinder and mixed;

[0014] A mixing step (S13) of introducing the ferromagnetic material and the ferroelectric material into a mixer of a crucible so as to mix them in a 2:1 ratio;

[0015] A manufacturing step (S14) of preparing a soft molded body mixture by adding a one-component unsaturated polyester resin with an accelerator to a mixture of the ferromagnetic material and the ferroelectric material in the mixer, mixing by stirring at room temperature for 25 to 35 minutes;

[0016] Addition step (S15a) of adding and mixing a curing agent to the above soft molded body mixture;

[0017] A supply step (S15b) of supplying a mixture with added hardener to a mold;

[0018] An input step (S16) of supplying the soft molded body with the above-mentioned hardening agent added to the mold and introducing it into the chamber to be cured through a far-infrared lamp;

[0019] A heating step (S17) in which the initial temperature inside the chamber becomes 70 to 80°C, and the temperature inside the soft molded body becomes 130 to 300°C through additional heating, and is heated continuously for 20 to 30 minutes; and

[0020] The present invention aims to provide a method for manufacturing an electromagnetic material, characterized by including a storage step (S18) in which the hard molded body hardened by heating is separated from the mold and then cooled and stored at 5°C.

[0021] The electromagnetic material in the present invention comprises 40.0 to 50.0 wt% silicon dioxide (SiO2), 26.0 to 32.0 wt% aluminum oxide (Al2O3), 3.5 to 4.5 wt% magnesium oxide (MgO), 3.5 to 4.5 wt% iron oxide (Fe2O3), 1.5 to 2.5 wt% quicklime (CaO), 0.5 to 1.0 wt% titanium dioxide (TiO2), 1.5 to 2.0 wt% potassium oxide (K2O), 2.5 to 3.0 wt% sodium oxide (Na2O), 0.15 to 0.20 wt% manganese oxide (MnO), 0.03 to 0.07 wt% barium oxide (BaO), and 0.003 to 0.008 wt% It consists of copper oxide (CuO), 5 wt% polyester, and the remainder being impurities.

[0022] The above main component is a one-component main component composed of 40 wt% to 70 wt% of unsaturated polyester resin and 30 wt% to 50 wt% of hydrocarbon (H2O2), with an accelerator added to the main component in an amount of less than 1 wt%.

[0023] In the present invention, the curing agent consists of 30 to 40 wt% of methyl ethyl ketone peroxide, 45 to 50 wt% of dimethyl phthalate, 10 to 13 wt% of epoxy, 1 to 3.5 wt% of methyl ethyl ketone, and 1 to 3.5 wt% of hydrogen peroxide. Effects of the invention

[0025] As described above, the present invention creates a cubic molded body using an electromagnetic material that is a multiferroic material possessing both ferroelectric and ferromagnetic properties, and combines the molded body with a wire sheath or connection part. Since the electric field provided by the copper wire activates the generation of magnetization polarization and dielectric polarization in the ferromagnetic material, the time required for the magnetization direction to change due to the electric field is shortened, thereby increasing economic efficiency. Brief explanation of the drawing

[0027] Figure 1 is a manufacturing process diagram of the present invention. Figure 2 is a graph showing the magnetic and dielectric properties of the electromagnetic material of the present invention. FIG. 3 is a graph showing the magnetoelectric phenomenon of the electromagnetic material of the present invention. FIG. 4 is a graph showing the magnetoelectric phenomenon of the electromagnetic material of the present invention. Figure 5 is a graph showing the reaction waiting time of a conventional electromagnetic material, FIG. 6 is a graph showing the reaction waiting time of the present invention, Figure 7 is another graph showing the reaction waiting time of the present invention. Specific details for implementing the invention

[0028] Hereinafter, an electromagnetic body according to an embodiment of the present invention

[0029] The substance and its manufacturing method are described in detail.

[0030] FIG. 1 is a manufacturing process flowchart showing a method for manufacturing an electromagnetic material according to the present invention, FIG. 2 is a graph showing the magnetic and dielectric properties of an electromagnetic material according to the present invention, and FIG. 3 and FIG. 4 are graphs showing the magnetoelectric phenomenon of an electromagnetic material according to an embodiment of the present invention.

[0031] Method for manufacturing electromagnetic materials

[0032] A method for manufacturing an electromagnetic material according to an embodiment of the present invention, which enables magnetization by an electric field or control of electric polarization by a magnetic field by combining a ferromagnetic material having magnetic properties and a ferroelectric material having electrical properties, as illustrated in FIG. 1, comprises: a ferromagnetic material manufacturing step (S11); a ferroelectric material manufacturing step (S12); a mixing step of the ferromagnetic material and the ferroelectric material (S13); a soft molded body manufacturing step (S14) in which a main material with an accelerator added is introduced to manufacture a soft molded body; an addition step (S15a) in which a hardening agent is added to the soft molded body; a supply step (S15b) in which the soft molded body with the hardening agent added is supplied to a mold; an introduction step (S16) in which the mold receiving the soft molded body with the hardening agent added is introduced into a chamber; a heating step (S17) in which the soft molded body is heated with a far-infrared lamp; and a storage step (S18) in which the hardened molded body is separated from the mold and stored.

[0033] In the above ferromagnetic material manufacturing step (S11), in order to manufacture a ferromagnetic material that maintains magnetic polarization even when an external magnetic field disappears, the present invention manufactures a ferromagnetic material by grinding and mixing each of the ores of silicon dioxide (SiO2), aluminum oxide (Al2O3), magnesium oxide (MgO), iron oxide (Fe2O3), quicklime (CaO), titanium dioxide (TiO2), potassium oxide (K2O), sodium oxide (Na2O), manganese oxide (MnO), and barium oxide (BaO) into a powder with a size of 325 to 1000 mesh using a mill grinder.

[0034] Here, the content of each component of the ferromagnetic material is composed of 53.48 wt% silicon dioxide (SiO2), 30.92 wt% aluminum oxide (Al2O3), 1.58 wt% magnesium oxide (MgO), 3.66 wt% iron oxide (Fe2O3), 1.24 wt% quicklime (CaO), 0.41 wt% titanium dioxide (TiO2), 2.82 wt% potassium oxide (K2O), 2.82 wt% sodium oxide (Na2O), 0.33 wt% manganese oxide (MnO), and 0.06 wt% barium oxide (BaO), with the remainder being impurities, taking into account the ferroelectric material contained in the electromagnetic material.

[0035] In the above ferroelectric material manufacturing step (S12), each ore of silicon dioxide (SiO2), aluminum oxide (Al2O3), magnesium oxide (MgO), iron oxide (Fe2O3), quicklime (CaO), titanium dioxide (TiO2), potassium oxide (K2O), sodium oxide (Na2O), manganese oxide (MnO), barium oxide (BaO), and copper oxide (CuO) is ground into a powder of 325 to 1000 mesh using a mill grinder and mixed to manufacture a ferroelectric material.

[0036] Here, the content of each component of the ferroelectric material is composed of 38.1 wt% silicon dioxide (SiO2), 30.3 wt% aluminum oxide (Al2O3), 9.26 wt% magnesium oxide (MgO), 4.49 wt% iron oxide (Fe2O3), 1.29 wt% quicklime (CaO), 0.92 wt% titanium dioxide (TiO2), 0.38 wt% potassium oxide (K2O), 1.95 wt% sodium oxide (Na2O), 0.02 wt% manganese oxide (MnO), 0.01 wt% barium oxide (BaO), and 0.01 wt% copper oxide (CuO), with the remainder being impurities, taking into account the ferromagnetic material contained in the electromagnetic material.

[0037] The reason the size of the ores mixed into the ferromagnetic material is limited to 325 to 1000 mesh as described above is that if the size is 325 mesh or less, the electromagnetic material becomes dark black and it is difficult to maintain the magnetic polarization phenomenon, and if the size is 1000 mesh or more, it becomes too light gray and there is a case where magnetoelectric susceptibility does not exist.

[0038] In the mixing step (S13) of the above ferromagnetic material and ferroelectric material, the ferromagnetic material and the ferroelectric material are introduced into a mixer made of a crucible so that they are mixed in a 2:1 ratio, and the ferromagnetic material and the ferroelectric material are mixed so that they are evenly dispersed from each other.

[0039] After determining that the above materials are mixed evenly to some extent, a soft molded body is manufactured by adding a one-component unsaturated polyester resin with an accelerator added to bind the powders together (Step S14).

[0040] Next, an addition step (step S15a) is performed in which a curing agent is added to the soft molded body mixture prepared as above and mixed for 5 to 10 minutes.

[0041] As the above curing agent is mixed, the curing speed of the soft molded body mixture becomes faster. Here, the above curing agent consists of 30 to 40 wt% methyl ethyl ketone peroxide, 45 to 50 wt% dimethyl phthalate, 10 to 13 wt% epoxy, 1 to 3.5 wt% methyl ethyl ketone, and 1 to 3.5 wt% hydrogen peroxide.

[0042] After the hardener addition step (step S15a), in order to form a molded body such as that shown in FIGS. 1 to 3, a hardening step (step S15b) is performed by supplying the hardener-added soft molded body mixture to the bottom of a separate molding die to perform initial hardening to a tack-dry state.

[0043] The above-mentioned initially hardened molded body is placed inside a chamber heated by a far-infrared lamp or an electric furnace. (Step S16)

[0044] After introducing the above-mentioned initially cured molded body into the chamber, a heating step (step S17) is performed to first raise the temperature inside the chamber to 70 to 80°C using a far-infrared lamp or an electric furnace, and then further heat the soft molded body to a temperature of 130 to 300°C and cure it for 20 minutes to produce a hard molded body.

[0045] A storage step (step S18) is performed to store a hard molded body that has been hardened at the above temperature by slow cooling, and it is preferable to store it at a storage temperature of 5℃.

[0046] Here, a preferred electromagnetic material formed into a hard molded body by mixing the ferromagnetic material and the ferroelectric material and adding a main component and a curing agent comprises 40.0 to 50.0 wt% silicon dioxide (SiO2), 26.0 to 32.0 wt% aluminum oxide (Al2O3), 3.5 to 4.5 wt% magnesium oxide (MgO), 3.5 to 4.5 wt% iron oxide (Fe2O3), 1.5 to 2.5 wt% quicklime (CaO), 0.5 to 1.0 wt% titanium dioxide (TiO2), 1.5 to 2.0 wt% potassium oxide (K2O), 2.5 to 3.0 wt% sodium oxide (Na2O), 0.15 to 0.20 wt% manganese oxide (MnO), and 0.03 to It is preferable that it consists of 0.07 wt% barium oxide (BaO), 0.003 to 0.008 wt% copper oxide (CuO), 5 wt% polyester, and the remainder being impurities, and this provides ferroelectric properties in which a change in dielectric constant occurs at room temperature and dielectric polarization is formed even with a small electric field near "0".

[0047] The electromagnetic material in the present invention responds to an electric field. An electric field is a space in which the force exerted by an electric charge on its surroundings acts, and refers to an invisible force formed around an object in which electricity flows or a charge is stored.

[0048] The electromagnetic material in the present invention undergoes dielectric polarization and magnetization when subjected to an electric field (when in contact with a wire).

[0049] Dielectric polarization refers to the phenomenon where applying an electric field causes positive and negative charges within an electric ferromaterial to shift in opposite directions, resulting in the alignment of electric dipoles within the material.

[0050] Magnetization usually requires the application of a magnetic field to acquire magnetic properties, but the electromagnetic material in the present invention is a phenomenon in which internal magnetic moments are aligned by an electric field alone to exhibit magnetism, and this can be viewed as an irreversible electromagnetic effect.

[0051] Ultimately, when an electric field is supplied to an electromagnetic material, the internal structure of the material reacts to simultaneously exhibit the property of storing electricity (dielectricity) and the property of magnetization (magnetization).

[0052] Specifically, when an electric field is supplied to an electromagnetic material, the electric field creates dielectric polarization through the force that attracts atomic nuclei (+) and electrons (-) inside the material in opposite directions.

[0053] The electric field also forces the magnetic spin direction of the atoms in the electromagnetic material to align.

[0054] In the present invention, compared to the existing patent registration 10-1853793, the silicon dioxide content was reduced (55~65Wt% → 40~50Wt%) and the aluminum oxide content was increased (16~22Wt% → 26~32Wt%). This is because the band gap (7~8eV) of aluminum oxide is higher than the band gap (9eV) of silicon dioxide, but the dielectric constant (9~10.0) of aluminum oxide is more than twice as large as the dielectric constant (3.9) of silicon dioxide, allowing for the storage of more charge relative to the same thickness, and thus it is determined that the reaction time is shortened.

[0055] Experimental example of an electromagnetic material

[0056] The experimental examples regarding the method for manufacturing an electromagnetic material according to the present invention are as follows.

[0057] First, a 650-mesh ferromagnetic material powder was prepared, consisting of 53.48 wt% silicon dioxide (SiO2), 30.92 wt% aluminum oxide (Al2O3), 1.58 wt% magnesium oxide (MgO), 3.66 wt% iron oxide (Fe2O3), 1.24 wt% quicklime (CaO), 0.41 wt% titanium dioxide (TiO2), 2.82 wt% potassium oxide (K2O), 2.82 wt% sodium oxide (Na2O), 0.33 wt% manganese oxide (MnO), and 0.06 wt% barium oxide (BaO), with the remainder being impurities (Step S11).

[0058] Next, a 650-mesh ferroelectric material powder was prepared consisting of 38.1 wt% silicon dioxide (SiO2), 30.3 wt% aluminum oxide (Al2O3), 9.26 wt% magnesium oxide (MgO), 4.49 wt% iron oxide (Fe2O3), 1.29 wt% quicklime (CaO), 0.92 wt% titanium dioxide (TiO2), 0.38 wt% potassium oxide (K2O), 1.95 wt% sodium oxide (Na2O), 0.02 wt% manganese oxide (MnO), 0.01 wt% barium oxide (BaO) and 0.01 wt% copper oxide (CuO), and the remainder being impurities (Step S12).

[0059] A mixture was obtained by mixing the powder of the ferromagnetic material and the powder of the ferroelectric material in a 2:1 ratio (Step S13).

[0060] Then, 28 kg of a one-component unsaturated polyester, comprising a main component of 50 to 70 wt% unsaturated polyester resin and 30 to 50 wt% hydrocarbon (H2O2) to which an accelerator composed of 50 to 60 wt% styrene (C8H8) and 40 to 50 wt% cobalt (Co) was added, was first added to a stirring tank having a capacity of 150 L and a motor rotation speed of 175 rpm, and 20 kg of a mixture of ferromagnetic material powder and ferroelectric material powder mixed in a 2:1 ratio was secondarily added and stirred / mixed for 15 minutes to form a soft molded body (Step S14).

[0061] As described above, a powder mixed with a ferromagnetic material and a ferroelectric material is mixed and stirred with a one-component unsaturated polyester resin to which an accelerator has been added, and then 0.42 kg of curing agent is added and stirred for 5 minutes after the third addition (Step S15a).

[0062] When the soft molded body is completed by each of the above stirring steps, a supply step is performed in which the soft molded body is sequentially discharged from the stirring tank and supplied into the mold (step S15b).

[0063] Next, after the supply step, an input step is performed in which the mold filled with the soft molded body is introduced into the heating chamber (Step S16).

[0064] A soft molded body is introduced into the above chamber along with a mold, and the temperature inside the chamber is initially 70 to 80°C by operating an infrared lamp, and a heating step is performed to cure the soft molded body by heating it for 30 minutes until the internal temperature reaches 150°C (Step S17). At this time, the heating time may be adjusted depending on the thickness of the molded body.

[0065] As described above, the hard molded body of the rapidly hardened electromagnetic material is separated from the mold, cooled to ambient temperature, and stored in a low-temperature storage facility at approximately 5°C (Step S18).

[0066] Electromagnetic material test results

[0067] 1. Regarding magnetic and dielectric properties

[0068] As shown in the graph of Figure 2, when the weak ferromagnetic or quasi-ferromagnetic magnetization hysteresis curve characteristics and the weak ferroelectric hysteresis curve characteristics at room temperature were confirmed for the electromagnetic material according to the manufacturing example of the present invention, it was confirmed that there is a possibility that multiferroic or magnetoelectric properties coexist.

[0069] 2. Regarding magnetoelectric phenomena

[0070] As shown in the graph of Figure 3, regarding the electromagnetic material according to the embodiment of the present invention (blue, purple, orange, pink, and red graphs in the figure), when the direction was poled in a different direction with a relatively low DC electric field at room temperature, the magnetoelectric susceptibility (MES) showed a sign change, and as a result of confirming the magnetoelectric properties, it was found that the MES value was present, albeit a very small value. This showed a distinct difference from general materials, which showed almost no change in the MES sign value, indicated in black in the figure.

[0071] And, as a result of conducting experiments in the order of No Poling → +10kV / cm → -10kV / cm → +20kV / cm → ..., as the MES value increased up to 30kV / cm, the slope changed according to the + and - electric field directions, and showed the same signal after breakdown at 30kV / cm or higher.

[0072] As shown in the graph of Figure 4, it was confirmed that the slope changes similarly to the DC experiment when a 1 kHz pulsed electric field is used, and a nearly similar trend was observed through two repeated experiments as described above (in the figure, the blue, purple, pink, and red graphs represent the material of the present invention, and the black graph represents a general magnetic material).

[0073] 3. Regarding changes in current

[0074] The change in current was measured when a voltage of 8V (DC) was applied at room temperature to a general magnetic material and an electromagnetic material according to the manufacturing example of the present invention.

[0075] When a DC voltage of 8V was applied to a general magnetic material using an oscilloscope and the change in current was measured, it was found that almost no change occurred at room temperature.

[0076] However, regarding the electromagnetic material molded body according to the embodiment of the present invention, it was confirmed that a small change in current occurred at room temperature from 625 nA to 614 nA and from 646 nA to 640 nA (approximately 1 to 3%).

[0077] As a result of the above experiments, it was confirmed that the electromagnetic material according to the embodiment of the present invention simultaneously possesses small magnetic susceptibility polarization and ferroelectric dielectric polarization at room temperature, and it was found that the magnetoelectric susceptibility (MES) is present, albeit small, through changes in current at room temperature. However, it was discovered that the change in the sign of the MES according to electric field poling, which is a characteristic usually observed in magnetoelectric materials, appeared only when a very small voltage was applied.

[0078] Specific parts of the present invention have been described in detail above. It is evident to those skilled in the art that such specific descriptions are merely preferred embodiments and that the scope of the present invention is not limited thereto.

[0079] Therefore, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

[0080] 4. Regarding the electrical energy reduction effect

[0081] To verify whether the electromagnetic material of the present invention has an electrical energy reduction effect, 1) a Korea*Kit plating line was used as the load, 2) as the test method, the electromagnetic material of the present invention was molded into a bulk molded body, and the molded body was brought into contact with each phase (or simultaneously) of the wire on the load input side, and the amount of active power (average) in real-time was monitored for 24 hours, and the results are shown in Fig. 6. 3) The test period was installation (July 22, 2025), and the reaction date (August 4, 2025). 4) As shown in the graph timetable, it was confirmed that the electrical energy reduction response appeared after 14 days. This indicates that the response initiation period was significantly reduced compared to the existing 5.3 months as shown in Fig. 5.

[0082] In addition, 1) a Cherry* Rosa refrigerator was used as the load, 2) as the test method, the electromagnetic material of the present invention was molded into a bulk molded body, and the molded body was simultaneously brought into contact with each phase of the wire on the load input side, and the amount of active power (average) in real-time was monitored for 24 hours, and the results are shown in Fig. 7. 3) The test period was installation (November 25, 2025), reaction date (November 28, 2025), 4) as shown in the graph timetable, it was confirmed that the electrical energy reduction response appeared after 4 days. This also shows that the response initiation period was significantly reduced compared to the existing 5.3 months, as shown in Fig. 5. Explanation of the symbols

[0084] doesn't exist

Claims

Claim 1 A method for manufacturing an electromagnetic material capable of magnetization by an electric field or control of electric polarization by a magnetic field by combining a ferromagnetic material having magnetic properties and a ferroelectric material having electrical properties, wherein the material comprises 53.48 wt% silicon dioxide (SiO2), 30.92 wt% aluminum oxide (Al2O3), 1.58 wt% magnesium oxide (MgO), 3.66 wt% iron oxide (Fe2O3), 1.24 wt% quicklime (CaO), 0.41 wt% titanium dioxide (TiO2), 2.82 wt% potassium oxide (K2O), 2.82 wt% sodium oxide (Na2O), 0.33 wt% manganese oxide (MnO), and 0.06 wt% barium oxide (BaO), and the remainder being impurities, wherein each ore is processed using a mill grinder A manufacturing step (S11) of manufacturing a ferromagnetic material by grinding into a powder of 325 to 1000 mesh and mixing; 38.1 wt% silicon dioxide (SiO2), 30.3 wt% aluminum oxide (Al2O3), 9.26 wt% magnesium oxide (MgO), 4.49 wt% iron oxide (Fe2O3), 1.29 wt% quicklime (CaO), 0.92 wt% titanium dioxide (TiO2), 0.38 wt% potassium oxide (K2O), 1.95 wt% sodium oxide (Na2O), 0.02 wt% manganese oxide (MnO), 0.01 wt% barium oxide (BaO), and 0.A manufacturing step (S12) for manufacturing a ferroelectric material composed of 0.1 wt% copper oxide (CuO) and the remainder being impurities, wherein each ore is ground into a powder of 325 to 1000 mesh using a mill grinder and mixed; a mixing step (S13) for introducing the ferromagnetic material and the ferroelectric material into a crucible mixer so as to mix them in a 2:1 ratio; a manufacturing step (S14) for manufacturing a soft molded body mixture by introducing a one-component unsaturated polyester resin with an accelerator added as the main component into the mixture of the ferromagnetic material and the ferroelectric material in the mixer, stirring at room temperature for 25 to 35 minutes, and mixing; an addition step (S15a) for adding a curing agent to the soft molded body mixture and mixing; a supply step (S15b) for supplying the mixture with the added curing agent to a molding die; and inside a chamber to cure the soft molded body with the added curing agent through a far-infrared lamp while it is supplied to the molding die. A method for manufacturing an electromagnetic material, characterized by comprising: an input step (S16) of inputting; a heating step (S17) of continuously heating for 20 to 30 minutes in a state where the initial temperature inside the chamber becomes 70 to 80°C and the temperature inside the soft molded body becomes 130 to 300°C through additional heating; and a storage step (S18) of separating the hard molded body hardened by heating from the mold, cooling it, and storing it at 5°C. Claim 2 In claim 1, the electromagnetic material formed by mixing the ferromagnetic material and the ferroelectric material comprises 40.0 to 50.0 wt% silicon dioxide (SiO2), 26.0 to 32.0 wt% aluminum oxide (Al2O3), 3.5 to 4.5 wt% magnesium oxide (MgO), 3.5 to 4.5 wt% iron oxide (Fe2O3), 1.5 to 2.5 wt% quicklime (CaO), 0.5 to 1.0 wt% titanium dioxide (TiO2), 1.5 to 2.0 wt% potassium oxide (K2O), 2.5 to 3.0 wt% sodium oxide (Na2O), 0.15 to 0.20 wt% manganese oxide (MnO), and 0.03 to 0.07 wt% barium oxide (BaO). A method for manufacturing an electromagnetic material characterized by comprising 0.003 to 0.008 wt% copper oxide (CuO), 5 wt% polyester, and the remainder being impurities. Claim 3 An electromagnetic material characterized by being manufactured by any one of the manufacturing methods of claims 1 to 2.

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