Permanent magnetic ferrite and preparation method and ultrathin permanent magnetic ferrite magnetic shoe thereof

Abstract

The invention discloses a permanent magnetic ferrite which comprises the following components in parts by weight: 81-88 parts of Fe2O3, 12-19 parts of SrCO3, 1.2-5.5 parts of La2O3, 0.6-0.8 part of Co2O3, 1.5-4 parts of CaCO3 and 0.3-1.0 part of SiO2. The invention further discloses a preparation method of the permanent magnetic ferrite and an ultrathin permanent magnetic ferrite magnetic shoe produced by adopting the preparation method of the permanent magnetic ferrite. The ultrathin permanent magnetic ferrite magnetic shoe disclosed by the invention not only has a better magnetic performance, but also has better breaking strength which is greater than 150N, so that the ultrathin permanent magnetic ferrite magnetic shoe can be thinner and the thickness is less than or equal to 3.5mm. In the application process, the power of small and special electric machines can be effectively improved, the volume of the small and special electric machines can be effectively reduced, and the using range can be expanded, so that the purpose of lowering the cost by replacing a partially adhered neodymium iron boron magnetic shoe by the permanent magnetic ferrite magnetic shoe is realized.

Description

technical field [0001] The invention relates to a permanent magnet ferrite material, in particular to a permanent magnet ferrite, a method for manufacturing the permanent magnet ferrite, and an ultra-thin permanent magnet ferrite tile manufactured by the method. Background technique [0002] Permanent magnet materials are indispensable materials in the electronics industry, and are widely used in home appliances, automobiles, computers, communications, medical, aerospace, military and other fields. In recent years, permanent ferrite magnetic materials have played an important role in the research and development of magnetic materials due to their wide source of raw materials, low price and excellent magnetic properties. They have relatively high remanence (Br), coercive force (jHc ) and energy product (BH)max. [0003] The tile magnet is a kind of permanent magnet, which is mainly used in permanent magnet motors. Due to the deficiency of the magnetic properties of the exis...

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Problems solved by technology

Due to the deficiency of the magnetic properties of the existing permanent magnet ferrite and the defects of the manufacturing method of the magnetic tiles, the existing tile-shaped magnets have low magnetic properties and thick thickness (the thickness of the existing tile-shaped magnets is all above 6mm) ) defects, which lead to the shortcomings of large magnet volume and low magnetic performance in existing micro motors, which greatly limits the application of permanent ferrite magnets