Low-temperature sintering soft magnetic ferrite material and preparation method thereof

Abstract

The invention discloses a low-temperature sintering soft magnetic ferrite material and a preparation method thereof, and belongs to the technical field of electronic information functional materials and devices. Iron-nickel-zinc-copper oxide is used as a main component composition, CBS glass is used as a sintering aid, and the low-temperature sintering soft magnetic ferrite material is prepared bya solid-phase reaction method and prepared by ball milling, drying, pre-sintering, secondary ball milling, drying and pulverization and sieving and the other processes. The low-temperature sinteringsoft magnetic ferrite material has the characteristics of low sintering temperature, high self-resonance frequency, high quality factor and high impedance and can be used for manufacturing peak magnetic beads and chip inductors, and the problem that a magnetic body and a silver electrode cannot co-sinter well is solved.

Description

technical field [0001] The invention belongs to the technical field of electronic information functional materials and devices, and specifically relates to a soft magnetic ferrite material with the characteristics of low sintering temperature, high self-resonant frequency, high quality factor and high impedance and a preparation method thereof. It can be used to make spike magnetic beads, chip inductors, and solve the problem that magnets and silver electrodes cannot be co-fired well. Background technique [0002] At present, FeNiCuZn and FeMgCuZn are the main soft ferrite materials for low-temperature sintered multilayer chip inductors at home and abroad. Because they need to be co-sintered with pure silver inner conductors at about 900 ° C, different quantities are generally added in the formula design. and other burning aids, and the most commonly used burning aid is Bi 2 o 3 . [0003] (1) Add Bi 2 o 3 The working principle of burning aid: because Bi 2 o 3 The mel...

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Problems solved by technology

[0006] Add Bi 2 o 3 Although the cost is low, the cooling effect is good, and the operation is convenient; but Bi 2 o 3 It has a great influence on the electromagnetic properties of materials, and it is easy to cause abnormal grain growth, and Bi is a heavy metal element, which is less and less used

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