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Zhongshan magnets, magnet development way

by:Maghard      2020-09-14
5000 years ago human found natural magnet ( Fe3O4) 2300 years ago the Chinese natural magnet type ground into a spoon on the smooth surface, under the action of magnetic, spoon handle guide, yue 'SiNa' this is known as the world's first guide apparatus. 1000 years ago, Chinese people use magnets and iron, friction magnetized needle is made of the world's first compass. Around the year 1100 China will be the magnet needle and bearing plate installed an organic whole, become a magnet type guide device, used for navigation. 1405 - 1432 Zheng Heping guide apparatus great initiative began sailing in human history. 1488 - 1521 Columbus, gamma, Magellan with by the guide from the instrument to the famous global navigation found. William 1600 British people. Gilbert has published a monograph on magnetic magnet, repetition and developed the predecessors' knowledge on magnetic and experiment. French physicist C 1785. Coulomb described in torsion equation to establish the electric charge and magnetic pole inter-atomic forces' coulomb's law. 1820 Danish physicist H. C。 Oster found current induced magnetic force. 1831 British physicist M. Faraday discovered electromagnetic induction phenomenon. 1873 British physicist J. C。 Maxwell in his book 'theory of electric and magnetic completed the unification of the electromagnetic theory. 1898 - French physicist, P 1899. Curie discovered ferromagnetic material under a certain temperature ( Curie temperature) A paramagnetic phenomenon. French physicist, P 1905. 我。 Based on statistical mechanics theory explains everything of lang paramagnetic changes with temperature. French physicist, P 1907. E. Outside, put forward the molecular field theory, the extension of the lang wan's theory. 1921 Austrian physicist W. Pauli Bohr magneton is put forward as the basic unit of atomic magnetic moment. American physicist A. Compton electrons also have spin corresponding magnetic moment. 1928 British physicist P. 一个。 M。 Dirac with relativistic quantum mechanics perfectly explains the intrinsic spin and magnetic moment of the electron. And with the German physicist W. Heisenberg together to prove the existence of the origin of the electrostatic force exchange, laid the foundation of modern magnetism. 1936 Soviet physicist who finished masterpiece 'theoretical physics course, containing comprehensive and wonderfully discusses the modern electromagnetics and ferromagnetics chapter. 1936 - 1948 French physicist L. And antiferromagnetic neel ferrimagnetic concepts and theories, and in the subsequent years of study to deepen the understanding of magnetic material. 1967 contemporary Austrian physicist K. J。 Knight in quantum magnetism found under the guidance of magnetic energy product is at an all-time high of rare earth magnets ( SmCo5) , thus opened up a new era in the development of permanent magnetic material. In 1967, the United States at the university of Dayton Strnat etc. , to develop into a samarium cobalt magnet, marks the arrival of the era of rare earth magnets. The second generation of rare earth permanent magnet - 1974 Sm2Co17. The third generation of rare earth permanent magnet - 1982 Nd2Fe14B come out. Atomic magnet clearance - 1990 Sm- Fe- N. 1991 the German physicist, E. F。 Kerner, puts forward the theoretical basis of the role of bipolar exchange composite magnet, points out the prospects of the development of nanocrystalline magnets. With the development of the society, the application of the magnet is becoming more and more widely, from high-tech products to the most simple packaging, the most widely used or ndfeb magnets and ferrite magnets. From the development history of the magnet, the end of the 19th century in the early 20th century, the main use of carbon steel, tungsten, cobalt chromium steel and steel for permanent magnetic material. Magnet company is the specialized production ( Ndfeb) Powerful magnet company, has factories in dongguan city based wangniudun pier town. Magnet products used in toys, jewelry, crafts gifts, handmade gift box, leather handbags invisible magnetic button, plastic hardware products, audio equipment and other industries. Our company is located in dongguan city based wangniudun block cao beijiao town five chung village industrial zone, the company can provide customers 24 hours delivery, 36 hours to the customers specifications template. Magnet experts will find magnet products co. , LTD. , dongguan city, pack your satisfaction, more information you can view our company website/magnet. This article rigorous reproduced, if there are any violation, the consequence is proud! / dongguan magnet products co. , LTD. , magnets, powerful magnets, profiled magnets, magnet factory, dongguan magnet products co. , LTD
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