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Preparation method of nicuzn ferrite material

A ferrite material and powder technology, applied in the field of NiCuZn ferrite material and preparation, can solve the problems of porous structure, low density and high ferromagnetic resonance line width

Active Publication Date: 2019-04-12
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

However, it is prone to porous structure during sintering, resulting in lower density and higher ferromagnetic resonance linewidth

Method used

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  • Preparation method of nicuzn ferrite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: a kind of NiCuZn ferrite material and preparation method thereof, comprises the following steps:

[0032] 1) Recipe

[0033] Using Ni 0.37 co 0.15 Cu 0.1 Zn 0.4 Fe 1.98 o 3.99 ;

[0034] 2) Ball milling once

[0035] Mix the powder of the above formula evenly in a ball mill for 2 hours, and the ball milling medium is steel balls;

[0036] 3) pre-burning

[0037] Dry the ball mill material obtained in step 2), and pre-fire it in a furnace at 900°C for 2.5 hours;

[0038] 4) Doping

[0039] Step 3) the powder obtained by adding the following dopant by weight: 0.10wt% BaTiO 3 , 0.12wt% CaCO 3 , 0.08wt%V 2 o 5 , 0.12wt% Bi 2 o 3 ;

[0040] 5) Second ball milling

[0041] The powder obtained in step 4) is ball milled in a ball mill for 6 hours, the ball milling medium is zirconium balls, and the final powder particle size is 0.6-1.0 μm;

[0042] 6) Molding

[0043] Add 15wt% organic binder to the powder obtained in step 5) by weight, mix eve...

Embodiment 2

[0046] Embodiment 2: a kind of NiCuZn ferrite material and preparation method thereof, comprises the following steps:

[0047] 1) Recipe

[0048] Using Ni 0.37 co 0.15 Cu 0.1 Zn 0.4 Fe 1.98 o 3.99 ;

[0049] 2) Ball milling once

[0050] Mix the powder of the above formula evenly in a ball mill for 2 hours, and the ball milling medium is steel balls;

[0051] 3) pre-burning

[0052] Dry the ball mill material obtained in step 2), and pre-fire it in a furnace at 900°C for 2.5 hours;

[0053] 4) Doping

[0054] Step 3) the powder obtained by adding the following dopant by weight: 0.20wt% BaTiO 3 , 0.06wt% CaCO 3 , 0.12wt% Bi 2 o 3 ;

[0055] 5) Second ball milling

[0056] The powder obtained in step 4) is ball milled in a ball mill for 6 hours, the ball milling medium is zirconium balls, and the final powder particle size is 0.6-1.0 μm;

[0057] 6) Molding

[0058] Add 15wt% organic binder to the powder obtained in step 5) by weight, mix evenly, and after gran...

Embodiment 3

[0061] Embodiment 3: a kind of NiCuZn ferrite material and preparation method thereof, comprises the following steps:

[0062] 1) Recipe

[0063] Using Ni 0.32 co 0.2 Cu 0.1 Zn 0.4 Fe 1.98 o 3.99 ;

[0064] 2) Ball milling once

[0065] Mix the powder of the above formula evenly in a ball mill for 2 hours, and the ball milling medium is steel balls;

[0066] 3) pre-burning

[0067] Dry the ball mill material obtained in step 2), and pre-fire it in a furnace at 900°C for 2.5 hours;

[0068] 4) Doping

[0069] Step 3) the powder obtained by adding the following dopant by weight: 0.10wt% BaTiO 3 , 0.12wt% CaCO 3 , 0.08wt%V 2 o 5 , 0.12wt% Bi 2 o 3 ;

[0070] 5) Second ball milling

[0071] The powder obtained in step 4) is ball milled in a ball mill for 6 hours, the ball milling medium is zirconium balls, and the final powder particle size is 0.6-1.0 μm;

[0072] 6) Molding

[0073] Add 15wt% organic binder to the powder obtained in step 5) by weight, mix even...

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Abstract

The preparation method of NiCuZn ferrite material belongs to the technical field of electronic materials, and the present invention comprises the following steps: 1) formula: adopt Ni 0.52‑x co x Cu 0.1 Zn 0.4 Fe 1.98 o 3.99 , x=0-0.40; 2) once ball milling; 3) pre-burning: dry the ball mill and pre-fire it in a furnace at 900°C for 2-4 hours; 4) doping: add the following dopant: 0.001-0.80 wt% BaTiO 3 , 0.01‑0.20wt% CaCO 3 , 0.01‑0.20wt%V 2 o 5 , 0.001‑0.20 wt% Bi 2 o 3 ; 5) secondary ball milling: ball milling for 4-8 hours, the final powder particle size after ball milling is 0.6-1.0 μm; 6) forming; 7) sintering: the blank obtained in step 6) is placed in a sintering furnace, and the Heat preservation and sintering at 1080°C for 2-6 hours. The NiCuZn ferrite material prepared by the invention has excellent characteristics such as high saturation magnetic induction, high Curie temperature, low dielectric loss, low ferromagnetic resonance line width and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, in particular to a NiCuZn ferrite material and a preparation method. Background technique [0002] Microwave ferrite devices, as a very important branch of microwave devices, are indispensable components in microwave / millimeter wave electronic information communication equipment and systems. They have been widely used in radar, microwave communication, satellite communication, navigation, Electronic countermeasures and microwave measurement systems (see literature 1. J.D. Adam, L.E. Davis, G.F. Dionne, E.F. Schloemann, and S.N. Stitzer, "Ferrite devices and materials," IEEE Trans. -737, 2002.). The bandwidth, insertion loss, isolation, differential phase shift and other properties of microwave ferrite devices, as well as the high power withstand capability of devices, depend to a large extent on the basic properties of microwave ferrite materials (see literature 2. Han Zhiquan. Rev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/10C04B35/30C04B35/26C04B35/622
Inventor 孙科郑照阳余忠蒋晓娜兰中文燕周民
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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