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磁铁的力量：它们如何影响我们的生活

磁铁的力量虽然看起来很小，但在我们的生活中起着至关重要的作用。它以一种无声而坚定的方式影响着我们的日常生活和工作。

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MT Long stroke traction electromagnet The MT long stroke traction electromagnet is composed of a coil, a moving iron core, and a static iron core power controller. The structure is a shell like structure, applying the leakage magnetic flux principle of a spiral tube, and utilizing the electromagnetic moving iron core and the static iron core to engage for a long distance, with a stroke of over 40mm --60mm. Realize the linear reciprocating motion of the traction rod. Adopting the principle of power supply and electronic control conversion, high-power startup, and low-power maintenance, Hebei Qinneng patented demagnetization technology. The electromagnetic traction force reaches 300 kilograms. The traditional AC traction electromagnet starts and operates at a voltage and current, which is prone to burning the coil, causing limited traction and limited travel. The action of the long-distance traction electromagnet is simple and rapid, rising for 0.10 seconds and returning for less than 0.05 seconds. The operating frequency is: 17

2023-07

Diamagnetism There are electrons around the nucleus. The electrons are divided into Electron shell according to their energy. Each Electron shell is divided into sub Electron shell. There are orbits in the sub Electron shell. Each orbit has only two electrons with opposite spin directions. The existence areas of these two electrons can be considered to be basically the sameWhen an external magnetic field appears, all electrons in Orbital motion will be affected by the magnetic force, and their rotating circles will be offset by a certain degree, which will produce a small additional magnetic field, that is, magnetic moment. But if another electron in the same orbital with opposite spin also produces an opposite additional magnetic field, the magnetic moment of the previous electron will be offsetSo the more single electron orbitals, the greater the magnetic momentSuch molecules include H2O, SiO2, and AlCl3When the magnetization M is negative, the solid is Diamagnetism. Metals such as Bi, Cu, Ag, Au: 17

2023-07

Soft magnetic functional composite materials Soft magnetic functional composite material is a composite material composed of soft magnetic ferrite and polymer matrix, which has soft magnetic function. For soft magnetic materials, low Coercivity and high permeability are required to minimize the effect of permeability falling rapidly with the increase of frequency. It is advantageous to use thin film materials with high resistivity and small thickness. Soft magnetic functional composites can just play these characteristics. This is because the polymer matrix is insulating, and the composite with conductive magnetic body improves the resistivity. At the same time, the polymer is easy to process into thin sheets with good strength and flexibility. More importantly, the polymer separates and encloses the magnetic body, thus greatly reducing the eddy current loss and not heating the magnetic material. The loss of the magnetic iron core used as a low-frequency device is only 1C} W} kg. This type of material is mainly used for the iron: 17

2023-07

Principles of electromagnet a. Insert the iron nail (or soft iron) into the inside of a threaded coil, when the coil is connected to the current, the magnetic field inside the coil will be magnetic and magnetic.b. The magnetic field generated by the iron nails and the magnetic field in the original coil makes the total magnetic field intensity greatly enhanced.c. When the current is cut off, the magnetism of the coil and the iron nails disappears immediately. The magnet obtained by this method is called the electromagnet.d. Enhance the magnetic field method of the thread pipeline coil [1] Increase the number of units [2] Enhance the circular current [3] Put the soft magnet6. The characteristics of electromagneta. Can increase the current and increase the number of coils to make its magnetic force greater than natural magnets. You can hang huge steel plates or abandoned cars. There are also electromagnets in Ampere and Volt.b. The power generation generates magnetism, and the magnetic disappearance is disappeared: 13

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The magnetic effect of the current 1. What is the magnetic effect of current?a. The magnetic effect of the current (the magnetic power generates the magnetic): Ost found that any wire with a current can generate a magnetic field around it, called the magnetic effect of the current.b. Non -magnetic metals are current, but the magnetic field can be produced, and its effect is the same as the magnetic field established by the magnet.2. The magnetic field generated around the long straight wire with current.a. Around the long straight wire of the general current, there will be a magnetic field. The shape of the magnetic force line is a concentric circle that is closed with the wire of the wire, and the direction of the magnetic field is perpendicular to the direction of the current.b. The Law of Ampere: The magnetic field established around the long straight wire with current, which is directly proportional to the size of the current on the wire, and is inversely proportional to the distance between the wires.c. The directi: 13

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Gyromagnetic material The rotational magnetism of magnetic materials refers to the phenomenon where a plane polarized electromagnetic wave * propagates in a certain direction within the material under the action of two mutually perpendicular DC magnetic fields and electromagnetic wave magnetic fields, and its polarization plane * * continuously rotates around the propagation direction (Figure 3). This type of material with rotational magnetic properties is called a rotational magnetic material.Under the action of direct current magnetic field and electromagnetic wave magnetic field, the phenomenon where a plane polarized electromagnetic wave * propagates in a certain direction within the material, and its polarization plane * * continuously rotates around the propagation direction. This material with rotational magnetic properties is called a rotational magnetic material. Although metal magnetic H material also has rotational magnetism, due to its low resistivity and high eddy current loss, electromagnetic: 12

2023-07

Piezomagnetic material Piezomagnetic materials refer to ferrite materials that can undergo mechanical elongation or shortening (magnetostriction) in the direction of the magnetic field during magnetization. At present, the most widely used are nickel zinc ferrite Ni-ZnFe2O4, nickel copper ferrite Ni-CuFe2O4, and nickel magnesium ferrite Ni-MgFe2O4, among others.Piezomagnetic materials are mainly used for ultrasonic and underwater acoustic devices that convert electromagnetic and mechanical energy, magnetoacoustic devices, as well as telecommunications devices, underwater televisions, electronic computers, and automatic control devices.Piezomagnetic materials and piezoelectric ceramic materials (such as Barium titanate) have almost the same application field, but they are applied under different conditions due to their different characteristics. It is generally believed that ferrite piezoelectric materials are only suitable for frequencies within the tens of thousands of hertz range, while piezoelectric ceram: 12

2023-07

Ferromagnetic Sources of Ferrite Materials As for the source of ferromagnetism of ferrite materials, it is not that the magnetism of ordinary metal magnetic materials is formed by the Exchange interaction of direct electron spin between adjacent magnetic atoms, but that the distance between two magnetic ions is far, and oxygen ions are sandwiched in the middle. In fact, the Exchange interaction between the electron spins that form ferromagnetism is formed due to the existence of oxygen ions. This type of Exchange interaction is called Superexchange in ferromagnetic theory. Because of the super exchange, the magnetic moments of magnetic ions on both sides of oxygen ions are arranged in the opposite direction, which is the reason why many metal oxides have Antiferromagnetism. If the magnetic moments arranged in the opposite direction are not equal and there are residual magnetic moments, then this kind of magnetism is called Ferrimagnetism, or ferrite magnetism. Because there are many relative positions between oxygen ions and ma: 11

2023-07

Hard magnetic material Hard magnetic materials are relative to soft magnetic materials. It refers to a type of ferrite material that is not easily demagnetized after magnetization and can retain magnetism for a long time. Therefore, sometimes also known as permanent magnet materials or permanent magnet materialsThe crystal structure of hard magnetic materials is mostly hexagonal magnetic lead stone type. Its typical representative is barium ferrite BaFe12O19 (also known as barium permanent porcelain or barium magnetic porcelain), which is a ferrite hard magnetic material with good performance, low cost, and suitable for industrial production.This material can not only be used as a magnet for recorders, microphones, pickups, telephones, and various instruments in telecommunications devices, but also has been applied in pollution treatment, medical biology, and printing displays.Hard magnetic ferrite material is the second main hard magnetic material after aluminum nickel drill series hard magnetic metal mater: 11

2023-07

Soft magnetic material Soft magnetic material refers to a type of ferrite material that is easily magnetized and demagnetized under weak magnetic fields (as shown in Figure 1). The typical representatives of soft magnetic materials are manganese zinc ferrite Mn ZnFe2O4 and nickel zinc ferrite Ni ZnFe2O4.Soft ferrite is a type of ferrite material with a wide range of uses, a large quantity, a large variety, and a high output value among various ferrite materials. Currently, there are dozens of products produced in batches in the world, with an annual output of over tens of thousands of tons.Soft magnetic ferrite is mainly used as various inductance components, such as filter cores, transformer cores, antenna cores, deflection cores, as well as magnetic cores for magnetic tape recording and recording heads, multi-channel communication, and other recording heads.Generally, the crystal structure of soft ferrite is Cubic crystal system spinel type, which is used in the audio frequency to Very high frequency frequ: 11

2023-07

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