Preparation method for soft magnetic ferrite with high saturation magnetic induction strength and high magnetic permeability

Abstract

The invention discloses a preparation method for soft magnetic ferrite with high saturation magnetic induction strength and high magnetic permeability. The method comprises the following steps: adding ferrous chloride, manganese chloride, zinc chloride and nickel chloride into hydrochloric acid, after completion of dissolving, adding yttrium oxide and strontium oxide, and carrying out stirring until completion of dissolving so as to obtain a material A; dropwise adding a sodium hydroxide solution into the material A until a pH value is 9 to 11, carrying out standing and aging for 10 to 15 h, then adding triethanolamine and polyvinyl alcohol under stirring, then carrying out standing and hydrothermal reaction, and carrying out natural cooling, washing, filtering and drying so as to obtain a material B; and mixing zirconium oxide, titanium oxide, vanadium oxide, magnesium oxide, platinum oxide, molybdenum oxide, barium oxide, cerium oxide, tin oxide, indium oxide, borax, calcium carbonate, strontium carbonate and absolute ethanol, then carrying out ball milling, adding the material B and an adhesive and then carrying out uniform mixing, and carrying out pressing molding, microwave sintering and cooling so as to obtain the soft magnetic ferrite with high saturation, high magnetic induction intensity and high magnetic permeability.

Description

technical field [0001] The invention relates to the technical field of soft ferrite, in particular to a method for preparing soft ferrite with high saturation magnetic induction and high permeability. Background technique [0002] Soft ferrite refers to a magnetic material that is easily magnetized and demagnetized under the action of an external magnetic field. It is often a composite oxide obtained by sintering iron oxide and one or more other metal oxides. The application of soft magnetic materials in industry began at the end of the 19th century, with the rise of electric power and telecommunication technology, and its application range is extremely wide. Soft magnetic materials are not only used in the fields of home appliances, information technology, automobiles and other supporting fields, but more importantly, soft magnetic materials, as the main raw materials for the production of electronic components, have brought a steady stream of demand for them. [0003] At ...

AI Technical Summary

Problems solved by technology

[0004] With the development of the electronics industry and the expansion of application fields, the requirements for magnetic materials are getting higher and higher, and the classification requirements for material properties are more detailed and specialized, but the soft magnetic ferrite in the prior art often has a magnetic permeability And the saturation magnetic induction is not ideal enough. I hope that the corresponding powder index of the product can reach: the saturation magnetic induction > 480mT at 25°C, and the initial magnetic permeability is above 3800, but the materials currently used cannot guarantee mass production of products that meet this requirement. There is a need for a new soft ferrite material with high saturation magnetic induction and high permeability

Images