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LiZnTi gyromagnetic ferrite material and preparation method thereof

A technology of gyromagnetic ferrite and main material, which is applied in the field of LiZnTi gyromagnetic ferrite material and its preparation, can solve composition segregation, affect LiZnTi ferrite grain growth, magnetic domain reversal microwave modulation, crystal phase impurity etc. to achieve high saturation magnetization, low sintering temperature, and low ferromagnetic resonance linewidth

Inactive Publication Date: 2015-04-08
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

At present, the research on the low-temperature sintering method of ferrite is mainly reflected in the improvement of the preparation process and the doping of the ferrite material. The improvement of these two aspects needs to be considered at the same time, otherwise it will affect the grain growth of LiZnTi ferrite. , magnetic domain inversion, microwave modulation and other properties, there are problems such as composition segregation and crystal phase impurity

Method used

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  • LiZnTi gyromagnetic ferrite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0018] A preparation method of LiZnTi gyromagnetic ferrite material, comprising the following steps:

[0019] Step 1: Fe 2 o 3 , ZnO, TiO 2 , Li 2 CO 3 as raw material, according to Li 0.43 Zn 0.27 Ti 0.12 Fe 2.18 o 4 The ratio of the molecular formula is weighed, and the main powder is prepared;

[0020] Step 2: Perform a ball mill according to the mass ratio of main powder: water: iron ball = 1:1.2:3. The ball milling time is 4 hours. After taking it out, dry it at 100°C. Put the powder obtained after drying into sintering In the furnace, the temperature was raised from room temperature to 800 °C at a heating rate of 2 °C / min and kept for 1 hour, and then naturally cooled to room temperature with the furnace to obtain the main LiZnTi material;

[0021] Step 3: with BaO, Bi 2 o 3 , B 2 o 3 , Li 2 O, SiO 2 As the raw material, the raw material is according to the mass ratio BaO: Bi 2 o 3 :B 2 o 3 : Li 2 O: SiO 2 = 2:2:2:3:1 ratio of ingredients, wet ball ...

Embodiment 2

[0025] A preparation method of LiZnTi gyromagnetic ferrite material, comprising the following steps:

[0026] Step 1: Fe 2 o 3 , ZnO, TiO 2 , Li 2 CO 3 as raw material, according to Li 0.43 Zn 0.27 Ti 0.12 Fe 2.18 o 4 The ratio of the molecular formula is weighed, and the main powder is prepared;

[0027] Step 2: Perform a ball mill according to the mass ratio of main powder: water: iron ball = 1:1.3:3. The ball milling time is 6 hours. After taking it out, dry it at 100°C. Put the powder obtained after drying into sintering In the furnace, the temperature was raised from room temperature to 820 °C at a heating rate of 2 °C / min and kept for 2 hours, and then naturally cooled to room temperature with the furnace to obtain the main LiZnTi material;

[0028] Step 3: with BaO, Bi 2 o 3 , B 2o 3 , Li 2 O, SiO 2 As the raw material, the raw material is according to the mass ratio BaO: Bi 2 o 3 :B 2 o 3 : Li 2 O: SiO 2 = 2:2:2:3:1 ratio of ingredients, wet ball ...

Embodiment 3

[0032] A preparation method of LiZnTi gyromagnetic ferrite material, comprising the following steps:

[0033] Step 1: Fe 2 o 3 , ZnO, TiO 2 , Li 2 CO 3 as raw material, according to Li 0.43 Zn 0.27 Ti 0.12 Fe 2.18 o 4 The ratio of the molecular formula is weighed, and the main powder is prepared;

[0034] Step 2: Perform a ball mill according to the mass ratio of main powder: water: iron ball = 1:1.4:3. The ball milling time is 8 hours. After taking it out, dry it at 100°C. Put the powder obtained after drying into sintering In the furnace, the temperature was raised from room temperature to 820 °C at a heating rate of 2 °C / min and kept for 3 hours, and then the temperature was naturally lowered to room temperature with the furnace to obtain the main LiZnTi material;

[0035] Step 3: with BaO, Bi 2 o 3 , B 2 o 3 , Li 2 O, SiO 2 As the raw material, the raw material is according to the mass ratio BaO: Bi 2 o 3 :B 2 o 3 : Li 2 O: SiO 2 = 2:2:2:3:1 ratio of ...

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Abstract

The invention relates to a LiZnTi gyromagnetic ferrite material and a preparation method thereof, belonging to the field of magnetic material preparation. The LiZnTi gyromagnetic ferrite material is composed of 98.8-99.9 wt% of main material and 0.1-1.2wt% of glass phase sintering aid. The main material is Li0.43Zn0.27Ti0.12Fe2.18O4; and the glass phase sintering aid is prepared from the following raw materials in parts by mass: 2 parts of BaO, 2 parts of Bi2O3, 2 parts of B2O3, 3 parts of Li2O and 1 part of SiO2. The method implements the sintering and preparation of the LiZnTi ferrite at low temperature (900-940 DEG C); and the obtained LiZnTi gyromagnetic ferrite material has the advantages of low sintering temperature, low ferromagnetic resonance line width and high saturation magnetization.

Description

technical field [0001] The invention belongs to the field of magnetic material preparation, and in particular relates to a LiZnTi gyromagnetic ferrite material and a preparation method thereof. Background technique [0002] With the development of radar technology and the needs of application fields, microwave / millimeter wave devices such as phase shifters for phased array radar are developing in the direction of high power, high precision and high frequency. Li-based ferrite materials with high saturation magnetization can be well applied to ferrite microwave devices in the Ka band and above. LiZnTi gyromagnetic ferrite is a kind of Li-based ferrite material, which has the advantages of low coercivity, high saturation magnetization, high residual magnetic induction, etc., and has been widely valued in the preparation of microwave devices. [0003] The LiZnTi ferrite material prepared by traditional high-temperature sintering (~1200°C) method can be applied to the preparati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/63
Inventor 廖宇龙王晓艺张怀武周廷川贾利军杨青慧
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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