permanent magnet

简明释义

永久磁铁

英英释义

例句

1.Many toys use a permanent magnet 永磁体 to stick parts together.

许多玩具使用permanent magnet 永磁体将部件粘合在一起。

2.The speaker system utilizes a permanent magnet 永磁体 to produce sound.

扬声器系统利用permanent magnet 永磁体来产生声音。

3.A permanent magnet 永磁体 can be used in magnetic levitation systems.

可以在磁悬浮系统中使用permanent magnet 永磁体。

4.The refrigerator door closes tightly thanks to the permanent magnet 永磁体 in the seal.

冰箱门由于密封条中的permanent magnet 永磁体而紧紧关闭。

5.In electric motors, a permanent magnet 永磁体 helps create rotational motion.

在电动机中，permanent magnet 永磁体有助于产生旋转运动。

作文

A permanent magnet is a type of magnet that maintains its magnetic properties without the need for an external power source. Unlike temporary magnets, which only exhibit magnetism when under the influence of an external magnetic field, a permanent magnet retains its magnetism over time. This characteristic makes permanent magnets invaluable in various applications across multiple industries.The most common materials used to create permanent magnets include iron, nickel, cobalt, and certain alloys. These materials are capable of being magnetized and can maintain their magnetic state once they are magnetized. The process of magnetization typically involves exposing these materials to a strong magnetic field, aligning the magnetic domains within them. Once aligned, the domains remain in their positions, resulting in a stable magnetic field that characterizes a permanent magnet.One of the most significant advantages of permanent magnets is their ability to provide a constant magnetic force without the need for electricity. This feature is particularly useful in applications such as electric motors, generators, and magnetic locks. For instance, in electric motors, permanent magnets are often used to create a magnetic field that interacts with coils of wire, leading to motion. This not only enhances efficiency but also reduces energy consumption since no external power is required to maintain the magnetic field.In addition to their use in motors, permanent magnets are also widely employed in various consumer products. From refrigerator magnets that hold notes and pictures to magnetic clasps used in jewelry, the versatility of permanent magnets is evident in everyday life. They are also crucial components in technology, such as hard drives and speakers, where they help in data storage and sound production, respectively.The manufacturing of permanent magnets has evolved significantly over the years. Advances in material science have led to the development of more powerful magnets, such as neodymium magnets, which are among the strongest permanent magnets available today. These magnets are made from an alloy of neodymium, iron, and boron, providing exceptional magnetic strength in a compact size. Their strength and compactness make them ideal for applications where space is limited, such as in mobile devices and compact electronic equipment.However, it is essential to handle permanent magnets with care. Due to their strong magnetic fields, they can attract ferromagnetic materials with great force, which can lead to injuries or damage to nearby objects. Additionally, extreme heat can demagnetize permanent magnets, so it is crucial to keep them away from high-temperature environments.In conclusion, permanent magnets play a vital role in modern technology and everyday life. Their ability to maintain a constant magnetic field without external power makes them indispensable in various applications, from industrial machinery to household items. As technology continues to advance, the importance of permanent magnets will only grow, paving the way for innovative solutions and improved efficiencies in numerous fields. Understanding the properties and applications of permanent magnets is essential for anyone interested in the realms of physics, engineering, and technology.

永磁体是一种无需外部电源即可保持其磁性特性的磁铁。与临时磁铁不同，临时磁铁仅在外部磁场的影响下表现出磁性，而永磁体则能随着时间的推移保持其磁性。这一特性使得永磁体在多个行业的各种应用中变得不可或缺。制造永磁体的最常见材料包括铁、镍、钴和某些合金。这些材料能够被磁化，并且一旦被磁化，就可以保持其磁状态。磁化过程通常涉及将这些材料暴露在强磁场中，从而使其内部的磁畴排列一致。一旦排列，磁畴就会保持在其位置，从而形成一个稳定的磁场，这就是永磁体的特征。永磁体的一个显著优势是它们能够在没有电力的情况下提供恒定的磁力。这一特性在电动机、发电机和磁锁等应用中尤为重要。例如，在电动机中，永磁体常用于创建与线圈相互作用的磁场，从而导致运动。这不仅提高了效率，还减少了能耗，因为维持磁场不需要外部电源。除了在电动机中的应用外，永磁体还广泛应用于各种消费产品。从用于固定便条和照片的冰箱磁铁到用于珠宝的磁扣，永磁体的多功能性在日常生活中显而易见。它们在技术中也是至关重要的组成部分，例如硬盘驱动器和扬声器，在这些设备中，它们帮助数据存储和声音生产。永磁体的制造在近年来经历了显著的发展。材料科学的进步导致了更强大磁铁的发展，例如钕磁铁，这是目前可用的最强永磁体之一。这些磁铁由钕、铁和硼的合金制成，在紧凑的尺寸中提供卓越的磁强度。它们的强度和紧凑性使其成为空间有限的应用的理想选择，例如移动设备和紧凑型电子设备。然而，处理永磁体时必须小心。由于它们强大的磁场，它们可以以极大的力量吸引铁磁材料，这可能导致受伤或损坏附近的物体。此外，极端高温可能会使永磁体失去磁性，因此应将其远离高温环境。总之，永磁体在现代技术和日常生活中发挥着至关重要的作用。它们在没有外部电源的情况下保持恒定的磁场的能力使其在工业机械到家居用品的各种应用中变得不可或缺。随着技术的不断进步，永磁体的重要性只会增加，为各个领域的创新解决方案和提高效率铺平道路。理解永磁体的特性和应用对于任何对物理、工程和技术领域感兴趣的人来说都是至关重要的。