Magnetic Flux Density (B) When a ferromagnetic or ferrimagnetic material is placed in an external magnetic field, its atomic magnetic moments tend to align with the applied field. This alignment creates an additional internal magnetic field, known as magnetization (M). The combined effect of the external magnetic field (H) and the magnetization (M) inside the material results in what we call magnetic flux density, symbolized as (B). In simple terms: (B) = The total magnetic field that the magnet actually

Surface Magnetic Field refers to the magnetic flux density measured at a specific point on the surface of a magnet. It is expressed in units of Gauss (Gs) or Tesla (T), where 1 T = 10,000 Gs. Because the magnetic field strength varies across different areas of a magnet’s surface, the value commonly referred to as the “surface magnetic field” usually represents the magnetic flux density at the center of the working surface of the magnet. Measuring Surface Magnetic Field

Introduction Building on our previous overview of the Production process of sintered Neodymium magnets, this series of articles delves deeper into the key technologies involved in the production of these magnets. In this first installment, we focus on the initial phase: raw material preparation and alloy melting and casting. Raw Material Preparation and Alloy Fabrication The fabrication of sintered Neodymium magnets starts with careful preparation of raw materials, typically involving pure metals or intermediate alloys. These materials are subjected to

Introduction Following our exploration of raw material preparation and alloy melting in the first part Neodymium Magnet Production Series Part 1 – Raw Material Preparation and Alloy Melting of our NdFeB magnet production series, we now turn our attention to a crucial subsequent phase: the milling process. Integral to the manufacturing of NdFeB (Neodymium-Iron-Boron) magnets, milling transforms the carefully prepared alloys into the fine powder necessary for crafting high-performance magnets. Milling, a process that determines the shape, average size, and distribution

Introduction Welcome back to our Neodymium Magnet Production Series. In our previous articles, we briefly introduced the production and preparation process of sintered Neodymium permanent magnets, giving a general overview of their production stages and key equipment (The Process of Making Neodymium Magnets). Building on this foundation, Part 3 delves into the critical stages of orientation and shaping. These processes are essential for determining the final performance of the magnets. After the intricate milling and alloy preparation, orientation and shaping

Introduction As we continue our detailed exploration of Neodymium Magnet production, this fourth part of the series shifts our focus to the vital processes of sintering, heat treatment, and machining. These stages are instrumental in refining and finalizing the magnets’ properties and form. Sintering and heat treatment are key to developing the magnets’ intrinsic magnetic qualities, while precise machining ensures their utility in diverse applications. This segment of our series will provide an in-depth look at how these processes contribute

Introduction Magnetism, a natural phenomenon, is intrinsic to various materials. Experimental evidence shows that all substances can be magnetized to varying degrees when exposed to an external magnetic field. This article explores the different types of magnetic materials and their unique properties. Understanding Magnetism in Materials Materials exhibit distinct magnetic behaviors when subjected to external magnetic fields. These behaviors classify materials into five categories: paramagnetic, diamagnetic, ferromagnetic, ferrimagnetic, and antiferromagnetic: Paramagnetic Materials: These materials exhibit weak magnetization aligned with the

Introduction Neodymium magnets, known for their exceptional magnetic strength, are central to modern technology. From electric cars to smartphones, their role is ubiquitous yet often overlooked. Understanding the meticulous process of their creation not only highlights the marvels of material science but also emphasizes the critical importance of precision in industrial manufacturing. Raw Materials: The Foundation of Quality In the carpenter’s creed, ‘Solid wood, solid goods.’ This philosophy resonates deeply in the production of sintered Neodymium magnets. The selection of

Introduction to Speaker Magnets Speakers are intricate devices that play a crucial role in audio technology by converting electrical energy into sound. The type of magnet used in a speaker significantly influences its performance and sound quality. Classification of speakers can be based on the magnetic circuit structure (internal magnet vs. external magnet) and the principle of sound generation (dynamic, electromagnetic, piezoelectric, and electrostatic). Evolution of Speaker Magnet Technology Initially, dynamic speakers relied on electromagnetic drive mechanisms due to the

Introduction Magnetic field measurement is a crucial aspect in various industries, from electronics to healthcare. A Gaussmeter, also known as a Tesla meter, stands as the primary tool for this purpose. This guide delves into the workings of the widely-used Japanese KANETEC Gaussmeter and explores the principles and applications of magnetic field measurement. The Hall Effect: Core Principle Behind Gaussmeters The Gaussmeter operates based on the Hall Effect. When a current-carrying conductor is placed in a magnetic field, a transverse