permanent magnet

简明释义

永磁

英英释义

例句

1.In electric motors, permanent magnets provide a constant magnetic field.

在电动机中，永久磁铁提供恒定的磁场。

2.In hard drives, permanent magnets are essential for data storage.

在硬盘中，永久磁铁对数据存储至关重要。

3.A permanent magnet is commonly used in refrigerator doors to keep them closed.

一个永久磁铁通常用于冰箱门，保持其关闭。

4.Many toys, like magnetic building blocks, utilize permanent magnets for assembly.

许多玩具，比如磁性积木，利用永久磁铁进行组装。

5.The speakers in your home theater system likely use permanent magnets to produce sound.

你家影院系统中的扬声器可能使用永久磁铁来产生声音。

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 require electricity to generate a magnetic field, a permanent magnet produces a consistent magnetic field due to the alignment of its internal molecular structure. This characteristic makes permanent magnets incredibly useful in a variety of applications, from household items to advanced technological devices.The most common materials used to create permanent magnets are alloys of iron, nickel, and cobalt. These materials have specific magnetic properties that allow them to be magnetized and retain their magnetization over time. The process of making a permanent magnet involves exposing these materials to a strong magnetic field, which aligns the magnetic domains within the material. Once the external magnetic field is removed, the domains remain aligned, resulting in a stable and enduring magnetic field.One of the most notable uses of permanent magnets is in everyday household items. For instance, refrigerator magnets are a simple yet effective application of permanent magnets. They allow us to attach notes, photos, and other lightweight items to the refrigerator door, providing both functionality and decorative appeal. Additionally, permanent magnets are found in various kitchen appliances, such as blenders and mixers, where they help secure components in place or facilitate the operation of certain mechanisms.In the realm of technology, permanent magnets play a crucial role in many devices. For example, in electric motors, permanent magnets are used to create a magnetic field that interacts with the coils of wire, allowing the motor to convert electrical energy into mechanical energy. This principle is also utilized in generators, where mechanical energy is transformed back into electrical energy.Moreover, permanent magnets are essential in the field of data storage. Hard disk drives (HDDs) rely on permanent magnets to store data in the form of magnetic patterns. The read/write heads of HDDs detect and modify these patterns, enabling the storage and retrieval of vast amounts of information. As technology continues to advance, the demand for efficient and reliable data storage solutions has only increased, making permanent magnets even more vital.Another interesting application of permanent magnets is in the field of medicine. Magnetic resonance imaging (MRI) machines utilize powerful permanent magnets to create detailed images of the inside of the human body. The strong magnetic fields generated by these magnets interact with the hydrogen atoms in the body, allowing for precise imaging without the use of ionizing radiation.In conclusion, permanent magnets are integral to numerous aspects of modern life, from simple household items to complex technological devices. Their ability to maintain a constant magnetic field without external power makes them invaluable in various applications. As we continue to innovate and develop new technologies, the role of permanent magnets will undoubtedly expand, leading to even more exciting advancements in science and engineering.

永磁体是一种无需外部电源即可保持其磁性特性的磁体。与需要电力来产生磁场的临时磁体不同，永磁体由于其内部分子结构的排列而产生一致的磁场。这一特性使得永磁体在从家庭用品到先进技术设备的各种应用中非常有用。制造永磁体的最常见材料是铁、镍和钴的合金。这些材料具有特定的磁性，使它们能够被磁化并在时间上保持其磁化状态。制作永磁体的过程涉及将这些材料暴露于强磁场中，从而使材料内部的磁畴排列。一旦外部磁场被移除，这些磁畴仍然保持排列，从而产生一个稳定持久的磁场。永磁体最显著的用途之一是在日常家居用品中。例如，冰箱磁铁就是永磁体的一个简单而有效的应用。它们使我们能够将便条、照片和其他轻便物品附着在冰箱门上，同时提供功能性和装饰性。此外，永磁体还可以在各种厨房电器中找到，如搅拌机和混合机，它们帮助固定组件或促进某些机制的操作。在技术领域，永磁体在许多设备中发挥着至关重要的作用。例如，在电动机中，永磁体用于创建一个与线圈相互作用的磁场，使电动机能够将电能转化为机械能。这个原理也被应用于发电机中，其中机械能又被转化回电能。此外，永磁体在数据存储领域中至关重要。硬盘驱动器（HDD）依赖于永磁体以磁性模式的形式存储数据。HDD的读/写头检测和修改这些模式，从而实现大量信息的存储和检索。随着技术的不断进步，对高效可靠的数据存储解决方案的需求只会增加，这使得永磁体变得更加重要。永磁体的另一个有趣应用是在医学领域。磁共振成像（MRI）机器利用强大的永磁体生成详细的人体内部图像。这些磁体产生的强磁场与体内的氢原子相互作用，使得在不使用电离辐射的情况下进行精确成像。总之，永磁体在现代生活的许多方面中都是不可或缺的，从简单的家居用品到复杂的技术设备。它们在没有外部电源的情况下保持恒定磁场的能力使它们在各种应用中变得极为重要。随着我们不断创新和开发新技术，永磁体的角色无疑将扩展，带来更多激动人心的科学和工程进步。