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Preparation method of bi-generation lizntimn spun ferrite substrate material

A technology of gyromagnetic ferrite and substrate, applied in the direction of magnetism of inorganic materials, can solve the problems of composition segregation, complex synthesis process of low-melting glass, affecting the uniformity of crystal structure and gyromagnetic performance of ferrite materials, and achieve narrow ferromagnetic Effects of resonance linewidth, high squareness ratio, high saturation magnetic induction

Active Publication Date: 2020-02-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The synthesis process of the above-mentioned low-melting-point glass used in the preparation of LiZnTi ferrite is complicated, and it is prone to composition segregation, which affects the uniformity of the crystal structure and the gyromagnetic properties of the ferrite material.

Method used

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  • Preparation method of bi-generation lizntimn spun ferrite substrate material

Examples

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Effect test

Embodiment 1

[0020] A preparation method of Bi-generation LiZnTiMn gyromagnetic ferrite substrate material, comprising the following steps:

[0021] Step 1: With Li 2 CO 3 , ZnO, TiO 2 , Mn 3 o 4 , Fe 2 o 3 and Bi 2 o 3 as raw material, according to Li 0.42 Zn 0.27 Ti 0.11 mn 0.1 Fe 2.1-x Bi x o 4 (x=0.002) The ratio of molecular formula is weighed, and preparation obtains initial powder;

[0022] Step 2: Perform wet ball milling for 4 hours according to the weight ratio of initial powder: deionized water: steel ball = 1:1.5:2.5, take out the obtained slurry and dry it at 90°C, put the dried powder Put it into a sintering furnace with an oxygen atmosphere, raise the temperature from room temperature to 840 °C at a rate of 2 °C / min and keep it for 2 hours, then cool down to room temperature naturally with the furnace to obtain a pre-sintered powder;

[0023] Step 3: Perform secondary ball milling on the calcined powder obtained in step 2, wherein the weight ratio of powder: ...

Embodiment 2

[0026] A preparation method of Bi-generation LiZnTiMn gyromagnetic ferrite substrate material, comprising the following steps:

[0027] Step 1: With Li 2 CO 3 , ZnO, TiO 2 , Mn 3 o 4 , Fe 2 o 3 and Bi 2 o 3 as raw material, according to Li 0.42 Zn 0.27 Ti 0.11 mn 0.1 Fe 2.1-x Bi x o 4 (x=0.003) The ratio of molecular formula is weighed, and preparation obtains initial powder;

[0028]Step 2: According to the weight ratio of initial powder: deionized water: steel ball = 1:1.5:2.5, carry out wet ball milling for 4 hours, take out the obtained slurry and dry it at 100°C, and put the dried powder Put it into a sintering furnace with an oxygen atmosphere, raise the temperature from room temperature to 860 °C at a rate of 2 °C / min and keep it warm for 2 hours, then cool down to room temperature naturally with the furnace to obtain a pre-sintered powder;

[0029] Step 3: Perform secondary ball milling on the calcined powder obtained in step 2, wherein the weight ratio...

Embodiment 3

[0032] A preparation method of Bi-generation LiZnTiMn gyromagnetic ferrite substrate material, comprising the following steps:

[0033] Step 1: With Li 2 CO 3 , ZnO, TiO 2 , Mn 3 o 4 , Fe 2 o 3 and Bi 2 o 3 as raw material, according to Li 0.42 Zn 0.27 Ti 0.11 mn 0.1 Fe 2.1-x Bi x o 4 (x=0.003) The ratio of molecular formula is weighed, and preparation obtains initial powder;

[0034] Step 2: According to the weight ratio of initial powder: deionized water: steel ball = 1:1.5:2.5, carry out wet ball milling for 4 hours, take out the obtained slurry and dry it at 100°C, and put the dried powder Put it into a sintering furnace with an oxygen atmosphere, raise the temperature from room temperature to 860 °C at a rate of 2 °C / min and keep it warm for 2 hours, then cool down to room temperature naturally with the furnace to obtain a pre-sintered powder;

[0035] Step 3: Perform secondary ball milling on the calcined powder obtained in step 2, wherein the weight rati...

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Abstract

The invention discloses a method for preparing a Bi-substituted LiZnTiMn gyromagnetic ferrite substrate material, which belongs to the technical field of magnetic material preparation. The gyromagnetic ferrite substrate material adopts the oxide sintering preparation process. After batching, ball milling, oxygen atmosphere pre-firing, secondary ball milling, granulation molding, and sintering processes, the uniform and dense growth of grains is controlled, and the Bi-substituted LiZnTiMn ferrite is realized. The body is sintered at low temperature (880-920°C). The Bi-substituted LiZnTiMn gyromagnetic ferrite prepared by the invention has low sintering temperature, low dielectric loss, narrow ferromagnetic resonance line width, high saturation magnetic induction intensity and high squareness ratio.

Description

technical field [0001] The invention belongs to the technical field of magnetic material preparation, and in particular relates to a preparation method of Bi-generation LiZnTiMn gyromagnetic ferrite substrate material with narrow line width and high square ratio applied by LTCC technology. Background technique [0002] In recent years, with the rapid development of microwave technology and electronic devices towards miniaturization, high frequency, and integrated modularization, the use of LTCC (low temperature co-fired ceramics) technology to prepare surface-mounted stacked microwave / millimeter wave devices and realize system integration has become important direction of development. Due to its low dielectric loss, narrow ferromagnetic resonance linewidth, high saturation magnetic induction and squareness ratio, Mn-doped LiZnTi gyromagnetic ferrite has been paid attention to in the preparation of X and Ka band microwave ferrite devices, while The low-temperature sintering ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34C04B35/26C04B35/622
CPCC04B35/26C04B35/622C04B2235/3203C04B2235/3232C04B2235/3262C04B2235/3284C04B2235/3298
Inventor 贾利军赵元沛解飞张怀武李元勋
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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