Wide-temperature low-distortion mangan zinc ferrite and preparation method thereof

Abstract

The invention relates to a wide-temperature low-distortion mangan zinc ferrite applicable to a broadband network transformer and a preparation method thereof. The mangan zinc ferrite mainly comprises the following components: 52.0 to 53.0 mol percent of iron oxide computed by Fe2O3, 21.0 to 23.0 mol percent of zinc oxide computed by ZnO, and the balance of trimanganese tetroxide, and also comprises the following auxiliary components in percentage by weight (wt %) computed by respective standard substance CaCO3, SiO2, V2O5 and Co2O3: 0.03 to 0.04 of CaCO3, 0.005 to 0.01 of SiO2, 0.01 to 0.03 of V2O5 and 0.03 to 0.1 of Co2O3. The mangan zinc ferrite is prepared by an oxide method and sintered under the condition of bell-type furnace densification. A product has higher initial magnetic permeability mu i, low relative loss factor tan delta/mu i, and wide-temperature low-magnetic hysteresis coefficient eta B (-40 to 85 DEG C), is capable of reducing waveform distortion, reducing transmission errors and prolonging transmission distance in the process of transmitting signals, and meets the requirement of the application in outdoor severe environment.

Description

technical field The invention belongs to the technical field of manganese-zinc high magnetic permeability soft magnetic ferrite, in particular to a manganese-zinc ferrite for broadband network transformers with low temperature sintering, high initial magnetic permeability, wide temperature and low hysteresis coefficient (-40°C to 85°C) Ferrite and its preparation method. Background technique In recent years, with the rapid development of the Internet and the accelerated process of global economic informatization, new broadband network construction booms have been set off all over the world. Due to the improvement of modulation and demodulation technology and the progress of fast digital signal processing chip production technology, new access methods combining fast digital signal processing technology and advanced modulation and demodulation technology have emerged, such as asymmetric digital subscriber loop line (ADSL, Asymmetrical Digital Subscriber Loop) technology, high...

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Problems solved by technology

However, the harmonic distortion performance of high-permeability ferrite materials developed in China is very poor, and there is no research on this performance at all, so it is difficult to meet the technical requirements of passive magnetic devices for the development of broadband network access technology

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