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A high-performance nano-lizn ferrite core material

A ferrite core and ferrite material technology, applied in the direction of inorganic material magnetism, etc., can solve the problem of high solid-phase reaction temperature, affecting the performance of microwave phase shifters, amplitude-phase consistency and yield, material utilization and Problems such as unsatisfactory workability

Active Publication Date: 2019-07-02
ANHUI HUALIN MAGNETIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, due to the high loss of Li-based ferrite and high solid-state reaction temperature, the utilization rate and processability of the material are not ideal, and at the same time, the performance, amplitude-phase consistency, and yield of the microwave phase shifter are affected.

Method used

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  • A high-performance nano-lizn ferrite core material
  • A high-performance nano-lizn ferrite core material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of high-performance nanometer LiZn ferrite magnetic core material, each raw material is taken by weighing according to following proportioning:

[0018] Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 、C 6 h 8 o 7 ·H 2 O, where Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 The molar ratio is 43:6:7, with Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 NO of the three 3 - The sum of the moles is the basis, C 6 h 8 o 7 ·H 2 The mole fraction of O is 50%;

[0019] According to the above raw material ratio, the ferrite material is prepared according to the following steps:

[0020] S1: Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 Mix with water to prepare matrix solution;

[0021] S2: put C 6 h 8 o 7 ·H 2 O is mixed with water to prepare a complexing agent solution;

[0022] S3: Mix the matrix solution obtained in S1 with the complexing agent solution obtained in S2, add ammonia water to adjust the pH value to 6.8-7.2, ...

Embodiment 2

[0025] A kind of high-performance nano LiZn ferrite magnetic core material, each raw material is taken by following proportioning:

[0026] Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 、C 6h 8 o 7 ·H 2 O, where Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 The molar ratio is 44:7:8, with Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 NO of the three 3 - The sum of the molar weights is the basis, C 6 h 8 o 7 ·H 2 The mole fraction of O is 54%;

[0027] According to the above raw material ratio, the ferrite material is prepared according to the following steps:

[0028] S1: Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 Mix with water to prepare matrix solution;

[0029] S2: put C 6 h 8 o 7 ·H 2 O is mixed with water to prepare a complexing agent solution;

[0030] S3: Mix the matrix solution obtained in S1 with the complexing agent solution obtained in S2, add ammonia water to adjust the pH value to 6.8-7.2, and stir the mixed s...

Embodiment 3

[0033] A kind of high-performance nanometer LiZn ferrite magnetic core material, each raw material is taken by weighing according to following proportioning:

[0034] Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 、C 6 h 8 o 7 ·H 2 O, where Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 The molar ratio is 42:5:6, with Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 NO of the three 3 - The sum of the moles is the basis, C 6 h 8 o 7 ·H 2 The mole fraction of O is 48%;

[0035] According to the above raw material ratio, the ferrite material is prepared according to the following steps:

[0036] S1: Fe(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, LiNO 3 Mix with water to prepare matrix solution;

[0037] S2: put C 6 h 8 o 7 ·H 2 O is mixed with water to prepare a complexing agent solution;

[0038] S3: Mix the matrix solution obtained in S1 with the complexing agent solution obtained in S2, add ammonia water to adjust the pH value to 6.8-7.2, ...

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Abstract

The invention discloses a high-performance nanometer LiZn ferrite magnetic core material. The high-performance nanometer LiZn ferrite magnetic core material is prepared by mixing Fe(NO3)3.9H2O, Zn(NO3)2.6H2O, LiNO3, and water to prepare a matrix solution; mixing C6H8O7.H2O with water to prepare a complex agent solution; mixing the obtained substrate solution and the obtained complex agent solution; adding ammonium hydroxide into the mixed solution till the pH value reaches the range of 6.8-7.2, and mixing the obtained mixed solution to obtain sol; drying the sol to obtain xerogel and performing self propagating combustion to obtain ferrite nano-powder; moulding the obtained ferrite nano-powder; and elevating the temperature to 920-980 DEG C from the room temperature at a heating rate of 3-3.6 DEG C / min, and performing sintering in the presence of oxygen for 110-120 min to obtain the ferrite material, wherein the heating rate is increased at first and is decreased later with the temperature increases during the temperature elevating process, and the temperature, at which the heating rate changes, is in a range of 700-720 DEG C.

Description

technical field [0001] The invention belongs to the technical field of ferrite materials, in particular to a high-performance nano LiZn ferrite core material. Background technique [0002] Li-based ferrite has the advantage of high Curie temperature, therefore, its temperature stability is good, at the same time, the ratio of its magnetostriction coefficient to the magnetocrystalline anisotropy constant is also low, the hysteresis loop is rectangular, and the remanence Low sensitivity to stress, compared with other gyromagnetic materials, it has a good advantage in microwave phase shifters. In the prior art, due to the high loss of Li-based ferrite and high solid-state reaction temperature, the utilization rate and processability of the material are not ideal, and at the same time, the performance, amplitude-phase consistency, and yield of the microwave phase shifter are affected. . Therefore, it is necessary to improve the composition and preparation process of Li-based f...

Claims

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Application Information

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IPC IPC(8): H01F1/34C04B35/26C04B35/64
Inventor 沈宏江
Owner ANHUI HUALIN MAGNETIC TECH
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