Low-temperature sintering production technology for magnetic ferrite and inductive material

A magnetic ferrite, low-temperature sintering technology, applied in the manufacture of inductors/transformers/magnets, magnetism of inorganic materials, circuits, etc., can solve problems such as difficult miniaturization

Inactive Publication Date: 2006-08-02
巨东英 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, a coil is wound on a sintered body to form a transformer or an inductor, so it is difficult to achieve miniaturization

Method used

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  • Low-temperature sintering production technology for magnetic ferrite and inductive material
  • Low-temperature sintering production technology for magnetic ferrite and inductive material
  • Low-temperature sintering production technology for magnetic ferrite and inductive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Ordinary Magnetic Ferrite Fe 3 o 4 preparation of

[0032] First, prepare a certain concentration of Fe according to a predetermined ratio 2+ and Fe 3+ Solution, take a certain amount of test solution according to the composition of ferrite, mix evenly and preheat to a certain temperature, so that the crystal powder is completely dissolved; at the same time, weigh a certain amount of ammonium oxalate according to the coprecipitation reaction ratio to make a certain concentration solution; then the two solutions were added to 100ml aqueous solution at the same time, and stirred for 1h. After fully reacting, stop stirring and cool to room temperature. The precipitate was filtered, washed and dried to produce yellow ferric oxalate powder. By controlling the pH value of the reaction system, the particle size of ferric oxalate can be controlled, and by controlling the particle size of ferric oxalate, the control of Fe 3 o 4 The particle size of the magnetic fine powde...

Embodiment 2

[0037] Prepare a certain concentration of Ba according to the predetermined ratio 2+ , Zn 2+ , Fe 2+ and Fe 3+ Solution, take a certain amount of test solution according to the composition of ferrite, mix evenly and preheat to a certain temperature; at the same time, weigh a certain amount of ammonium oxalate according to the coprecipitation reaction ratio to make a solution with a certain concentration; Both solutions were added to 100ml of aqueous solution and stirred for 1h. After fully reacting, stop stirring and cool to room temperature. The precipitate was filtered, washed and dried to make oxalate powder. By controlling the feeding rate and the pH value of the reaction system, the particle size of the oxalate can be controlled. The iron oxalate is BaZnFe 6 o 11 Precursor of magnetic sintered body.

[0038] Next, put the oxalate into the quartz tube under the protective gas of carbon dioxide, take it out from the electric furnace after keeping it at 500°C for 1 h...

Embodiment 3

[0041] Prepare a certain concentration of Ba according to the predetermined ratio 2+ , Fe 2+ and Fe 3+ Solution, take a certain amount of test solution according to the composition of ferrite, mix evenly and preheat to a certain temperature; at the same time, weigh a certain amount of ammonium oxalate according to the coprecipitation reaction ratio to make a solution with a certain concentration; Both solutions were added to 100ml of aqueous solution and stirred for 1h. After fully reacting, stop stirring and cool to room temperature. The precipitate was filtered, washed and dried to produce a yellow oxalate powder. By controlling the feeding rate and the pH value of the reaction system, the particle size of the oxalate can be controlled. This oxalate is a precursor of the magnetic sintered body.

[0042] Secondly, put the oxalate into the quartz tube under the protective gas of carbon dioxide, take it out from the electric furnace after keeping it at 500°C for 1 hour, an...

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Abstract

This method provides a kind of manufacture method of low-temperature sintering magnetic ferrite material using on electric induction coil. To use a kind of or various kinds of mixture solution metal salt (the salt is soluble salt of metal such as iron, nickel, manganese, copper, zinc, barium, cobalt, strontium and magnesium) to react with soluble oxalate solution and generate metal oxalate deposition. After filtration, washing and separating, heating and decompose to generate even particle diameter ferrite powder under protection gas. Add an amount of addition agents (such as compounds of calcium, silicon, bismuth or boron) to the powder. Adjust sintering temperature and electromagnetic property of sintering body through adjusting the components and contents of addition agents. Put the powder in the mould and press to form shape. Keep under protection gas and temperature of 800-1000DEG C for 1-20 hours and sintering to make the sintering body.

Description

technical field [0001] The invention relates to low-temperature sintering technology of ferrite powder. Especially related to Fe 3 o 4 , MnZn, NiZn, MgZn and BaO·nFe 2 o 3 , PbO nFe 2 o 3 , SrO nFe 2 o 3 Low-temperature sintering of various magnetic ferrites such as MnCuZn, NiCuZn, MgCuZn, etc. for low-temperature sintering of ferrite for laminated inductor coils. Background technique [0002] In the development history of magnetic materials, before the 1920s, almost all of them were metal-based materials, and they were the first to achieve practical application. However, with the expansion of market demand from electric power to communication, there is an urgent need for soft magnetic materials suitable for higher frequencies, high resistivity, and lower eddy current loss. In order to meet this requirement, ferrite (an oxide magnetic material with iron oxide as the main component) came into being and has been put into practical use. After Kato and Takei of Tokyo I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F41/04H01F1/34
Inventor 巨东英边培
Owner 巨东英
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