ZnCo doped hexagonal crystal system W-type barium ferrite gyromagnetic material and preparation method thereof

A technology of barium ferrite and hexagonal crystal system, which is applied in the field of ZnCo-doped hexagonal crystal system W-type barium ferrite gyromagnetic material and its preparation, can solve the problems of large self-loss, etc., and achieve dense finished products, good mixing and Reaction, the effect of increasing the pre-burning temperature

Inactive Publication Date: 2017-03-15
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Description
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  • ZnCo doped hexagonal crystal system W-type barium ferrite gyromagnetic material and preparation method thereof
  • ZnCo doped hexagonal crystal system W-type barium ferrite gyromagnetic material and preparation method thereof
  • ZnCo doped hexagonal crystal system W-type barium ferrite gyromagnetic material and preparation method thereof

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Embodiment 1

[0036] A ZnCo-doped hexagonal W-type barium ferrite gyromagnetic material, the chemical formula of the material is Ba(Zn 1-x CO x ) 2 Fe 16 o 27 , where x=0.25, 0.30, 0.40.

[0037] The preparation method of the ZnCo-doped hexagonal W-type barium ferrite gyromagnetic material comprises the following steps:

[0038] (1) Select the BaCO whose purity is chemically pure or analytically pure 3 , ZnO, Co 2 o 3 and Fe 2 o 3 As a raw material, according to Ba(Zn 1-x CO x ) 2 Fe 16 o 27 Calculate x in and accurately weigh each raw material component;

[0039] (2) Put the above-mentioned components into the grinding device for the first grinding according to the mass ratio of the total raw material: ball mill ball: ball mill ball: water 1:2:1:1, and the time is 4 hours , the speed is 200 rpm;

[0040](3) Pre-burning: After the above-mentioned ground mixture is dried at 100°C and passed through a 40-mesh fine sieve, the temperature is raised to 1100°C at a heating rate of...

Embodiment 2

[0045] A ZnCo-doped hexagonal W-type barium ferrite gyromagnetic material, the chemical formula of the material is Ba(Zn 1-x CO x ) 2 Fe 16 o 27 , where x=0.25, 0.30, 0.40.

[0046] The preparation method of the ZnCo-doped hexagonal W-type barium ferrite gyromagnetic material comprises the following steps:

[0047] (1) Select the BaCO whose purity is chemically pure or analytically pure 3 , ZnO, Co 2 o 3 and Fe 2 o 3 As a raw material, according to Ba(Zn 1-x CO x ) 2 Fe 16 o 27 Calculate x in and accurately weigh each raw material component;

[0048] (2) Put the above-mentioned components into the grinding device for the first grinding according to the mass ratio of the total raw material: ball mill ball: ball mill ball: water 1:3:5:10, and the time is 24 hours , the rotating speed is 500 rpm;

[0049] (3) Pre-burning: After the above-mentioned ground mixture is dried at 120°C and passed through a 200-mesh fine sieve, the temperature is raised to 1100°C at a he...

Embodiment 3

[0054] A ZnCo-doped hexagonal W-type barium ferrite gyromagnetic material, the chemical formula of the material is Ba(Zn 1-x CO x ) 2 Fe 16 o 27 , where x=0.25, 0.30, 0.40.

[0055] The preparation method of the ZnCo-doped hexagonal W-type barium ferrite gyromagnetic material comprises the following steps:

[0056] (1) Select the BaCO whose purity is chemically pure or analytically pure 3 , ZnO, Co 2 o 3 and Fe 2 o 3 As a raw material, according to Ba(Zn 1-x CO x ) 2 Fe 16 o 27 Calculate x in and accurately weigh each raw material component;

[0057] (2) Put the above-mentioned components into the grinding device for the first grinding according to the mass ratio of the total raw material: ball mill ball: ball mill ball: water 1:2.5:3:5, and the time is 14 hours , the speed is 350 rpm;

[0058] (3) Pre-burning: After the above-mentioned ground mixture is dried at 110°C and passed through an 80-mesh fine sieve, the temperature is raised to 1100°C at a heating ra...

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Abstract

The invention provides a ZnCo doped hexagonal crystal system W-type barium ferrite gyromagnetic material and a preparation method thereof. The chemical formula of the material is Ba (Zn1-xCOx) 2Fe16O27. The preparation method includes the steps: selecting BaCO3, ZnO, Co2O3 and Fe2O3 as raw materials and weighing components of the raw materials by calculation according to Ba (Zn1-xCOx) 2Fe16O27; grinding and pre-sintering all the raw materials, globules of a ball mill, large balls of the ball mill and water for the first time; grinding calcined materials, the globules of the ball mill, the large balls of the ball mill and the water for the second time, drying the grinded mixture, adding glue into the mixture, grinding the mixture into small particles and pressing the small particles into sample rings or sample wafers for measurement; heating the formed rings and the formed wafers, preserving heat in an air furnace, and hermetically calcining the formed rings and the formed wafers to prepare samples. The hexagonal crystal system W-type barium ferrite gyromagnetic material is prepared by an improved traditional oxide method, the method is stable and mechanical and more applicable to large-scale industrial production and popularization as compared with a sol-gel method, and stable gyromagnetic characteristics of the samples are obtained.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter wave magnetic materials, in particular to a ZnCo-doped hexagonal W-type barium ferrite gyromagnetic material and a preparation method thereof. Background technique [0002] In the past ten years, magnetic ceramic materials have been widely used in microwave gyromagnetic devices, such as circulators, isolators, and phase shifters. In order to realize the application of microwave gyromagnetic, it is necessary to apply a DC bias magnetic field, resulting in an increase in the volume of the device and a decrease in reliability. For a millimeter-wave frequency device with a higher frequency, if the traditional gyromagnetic material is used, a very strong bias must be applied. A magnetic field is set to further increase the volume of the device. This contradicts the development trend of device miniaturization and planarization. Self-biasing circulators and isolators are one way to sol...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/626C04B35/64H01F1/34H01F1/10
CPCC04B35/2633C04B35/265C04B35/6261C04B35/64C04B2235/3215C04B2235/3275C04B2235/3284C04B2235/656C04B2235/767H01F1/10H01F1/348
Inventor 曾千骞刘颖力巫崇胜高黎文王雨刘谦
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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