permanent magnetism

简明释义

永磁性

英英释义

例句

1.The permanent magnetism 永久磁性 in speakers helps convert electrical energy into sound.

扬声器中的永久磁性 永久磁性有助于将电能转化为声音。

2.The refrigerator door closes securely thanks to the permanent magnetism 永久磁性 of the magnetic seal.

冰箱门因其磁性密封的永久磁性 永久磁性而牢牢关闭。

3.In electric motors, permanent magnetism 永久磁性 is used to create a constant magnetic field.

在电动机中，永久磁性 永久磁性用于产生恒定的磁场。

4.The strength of permanent magnetism 永久磁性 can vary depending on the material used.

材料的不同会影响永久磁性 永久磁性的强度。

5.Many toys utilize permanent magnetism 永久磁性 to stick pieces together.

许多玩具利用永久磁性 永久磁性将部件粘合在一起。

作文

Permanent magnetism, or 永久磁性, is a fascinating phenomenon that occurs when certain materials can maintain a stable magnetic field without the need for an external power source. This property is primarily found in ferromagnetic materials such as iron, cobalt, and nickel. Unlike temporary magnets, which only exhibit magnetic properties when exposed to a magnetic field, materials exhibiting 永久磁性 retain their magnetism even after the external field is removed. This unique characteristic has led to numerous applications in technology and industry.The science behind 永久磁性 is rooted in the alignment of magnetic domains within a material. In ferromagnetic substances, groups of atoms, known as domains, have their magnetic moments aligned in the same direction. When these domains are aligned, the material exhibits a net magnetic field. The process of magnetization involves exposing the material to a strong magnetic field, which causes the domains to align. Once the external field is removed, some of these domains remain aligned, resulting in 永久磁性.One of the most common uses of 永久磁性 is in the production of permanent magnets, which are widely used in various devices, from refrigerators to electric motors. These magnets provide a reliable source of magnetic force without the need for continuous energy input. For instance, in electric motors, 永久磁性 magnets are used to create a constant magnetic field, allowing for efficient operation and reduced energy consumption.In addition to their practical applications, 永久磁性 materials also play a significant role in scientific research. Physicists study these materials to understand magnetic phenomena and develop new technologies. For example, advancements in magnetic storage devices, such as hard drives, rely heavily on the principles of 永久磁性. Data is stored by manipulating the magnetic orientation of tiny regions on the disk, allowing for the retrieval of information.Furthermore, the study of 永久磁性 has led to innovations in medical technology. Magnetic resonance imaging (MRI) machines utilize powerful magnets to generate detailed images of the human body. The magnets used in MRI machines often incorporate 永久磁性 materials to produce a stable magnetic field necessary for accurate imaging.Despite its advantages, 永久磁性 does have limitations. Over time, permanent magnets can lose their magnetism due to factors such as temperature changes, physical damage, or exposure to opposing magnetic fields. However, advancements in material science are continually improving the durability and performance of 永久磁性 materials, making them more resilient and effective for various applications.In conclusion, 永久磁性 is a vital concept in both physics and engineering, underpinning many modern technologies. Its ability to provide a stable magnetic field without the need for external power makes it invaluable in numerous applications, from everyday household items to advanced medical equipment. Understanding 永久磁性 not only enhances our grasp of fundamental scientific principles but also paves the way for future innovations in technology and industry.

永久磁性是一个迷人的现象，当某些材料能够在没有外部电源的情况下保持稳定的磁场时，就会发生这种现象。这种特性主要存在于铁、钴和镍等铁磁材料中。与临时磁体不同，临时磁体仅在暴露于磁场时表现出磁性，而具有永久磁性的材料即使在外部磁场被移除后也能保持其磁性。这一独特特性导致了许多技术和工业应用。永久磁性的科学基础在于材料内部磁畴的排列。在铁磁物质中，原子的组群称为磁畴，它们的磁矩沿同一方向排列。当这些磁畴排列时，材料表现出净磁场。磁化过程涉及将材料暴露于强磁场，这会导致磁畴对齐。一旦外部磁场被移除，这些磁畴中的一些仍然保持对齐，从而产生永久磁性。永久磁性的一个最常见用途是在生产永久磁铁中，永久磁铁广泛用于各种设备，从冰箱到电动机。这些磁铁提供了可靠的磁力来源，而无需持续的能量输入。例如，在电动机中，永久磁性磁铁用于创建恒定的磁场，从而实现高效操作并减少能源消耗。除了实际应用外，永久磁性材料在科学研究中也发挥着重要作用。物理学家研究这些材料以了解磁现象并开发新技术。例如，磁存储设备（如硬盘）的进步在很大程度上依赖于永久磁性的原理。数据通过操纵磁盘上微小区域的磁取向来存储，从而允许信息的检索。此外，永久磁性的研究还推动了医疗技术的创新。磁共振成像（MRI）机器利用强大的磁铁生成人体的详细图像。MRI机器中使用的磁铁通常包含永久磁性材料，以产生进行准确成像所需的稳定磁场。尽管具有优势，永久磁性确实存在一些限制。随着时间的推移，永久磁铁可能由于温度变化、物理损坏或暴露于相反的磁场而失去其磁性。然而，材料科学的进步不断提高永久磁性材料的耐用性和性能，使其在各种应用中更加坚韧和有效。总之，永久磁性是物理学和工程学中的一个重要概念，是许多现代技术的基础。它能够在不需要外部电源的情况下提供稳定的磁场，使其在从日常家居用品到先进医疗设备的众多应用中不可或缺。理解永久磁性不仅增强了我们对基本科学原理的理解，还为未来技术和工业的创新铺平了道路。