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A kind of high-power torque ferrite material for Ku wave band and preparation method thereof

A ferrite material, high-power technology, applied in the direction of magnetism of inorganic materials, can solve the problems of reducing material coercivity and ferromagnetic resonance line width, material temperature stability, and saturation magnetization, etc., to achieve low coercivity. The effect of coercive force, reducing dielectric loss, and reducing ferromagnetic resonance linewidth

Active Publication Date: 2021-10-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the performance requirements of Ku-band high-power ferrite materials, it is necessary to reduce the saturation magnetization of the material, usually using Ti 4+ 、Al 3+ It is also beneficial to reduce the coercive force and ferromagnetic resonance linewidth of the material, but this will lead to a decrease in the Curie temperature of the material and a decrease in the temperature stability of the material. This problem has not been well understood. well resolved
However, for such materials, both high Curie temperature (T c ≥480℃), high remanence ratio (B r / B m ≥0.9), low coercivity (H c ≤1.5Oe) and Li-based ferrite materials with lower ferromagnetic resonance linewidth (ΔH<320Oe) have not been reported yet

Method used

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  • A kind of high-power torque ferrite material for Ku wave band and preparation method thereof
  • A kind of high-power torque ferrite material for Ku wave band and preparation method thereof
  • A kind of high-power torque ferrite material for Ku wave band and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of preparation method of high-power torque ferrite material for Ku wave band, specifically comprises the following steps:

[0033] Step 1. Ingredients

[0034] With Li 2 CO 3 、TiO 2 , ZnO, Mn 3 o 4 , Fe 2 o 3 As the raw material, according to the ferrite molecular formula Li 0.5+0.5x- 0.5y Ti x Zn y mn 0.06 Fe (2.44-1.5x-0.5y)(1-z) o 4-1.5(2.44-1.5x-0.5y)z Calculate the quality of raw materials and weigh them, where x=0.2, y=0.05, z=0.04;

[0035] Step 2, a ball mill

[0036] Mix the initial powder obtained in step 1 evenly in a ball mill for 2 hours;

[0037] Step 3. Pre-burning

[0038] Dry the ball abrasive obtained in step 2, and place it in a sintering furnace for pre-sintering. The pre-sintering temperature is 900° C., and the pre-sintering time is 4 hours. After completion, the temperature is naturally lowered to room temperature with the furnace to obtain a pre-sintered powder;

[0039] Step 4, secondary ball milling

[0040] Add additiv...

Embodiment 2

[0048] A kind of preparation method of high-power torque ferrite material for Ku wave band, specifically comprises the following steps:

[0049] Step 1. Ingredients

[0050] With Li 2 CO 3 、TiO 2 , ZnO, Mn 3 o 4 , Fe 2 o 3 As the raw material, according to the ferrite molecular formula Li 0.5+0.5x- 0.5y Ti x Zn y mn 0.06 Fe (2.44-1.5x-0.5y)(1-z) o 4-1.5(2.44-1.5x-0.5y)z Calculate the quality of raw materials and weigh them, where x=0.2, y=0.05, z=0.05;

[0051] Step 2, a ball mill

[0052] Mix the initial powder obtained in step 1 evenly in a ball mill for 2 hours;

[0053] Step 3. Pre-burning

[0054] Dry the ball abrasive obtained in step 2, and place it in a sintering furnace for pre-sintering. The pre-sintering temperature is 900° C., and the pre-sintering time is 4 hours. After completion, the temperature is naturally lowered to room temperature with the furnace to obtain a pre-sintered powder;

[0055] Step 4, secondary ball milling

[0056] Add additiv...

Embodiment 3

[0064] A kind of preparation method of high-power torque ferrite material for Ku wave band, specifically comprises the following steps:

[0065] Step 1. Ingredients

[0066] With Li 2 CO 3 、TiO 2 , ZnO, Mn 3 o 4 , Fe 2 o 3 As the raw material, according to the ferrite molecular formula Li 0.5+0.5x- 0.5y Ti x Zn y mn 0.06 Fe (2.44-1.5x-0.5y)(1-z) o 4-1.5(2.44-1.5x-0.5y)z Calculate the quality of raw materials and weigh them, where x=0.225, y=0.05, z=0.05;

[0067] Step 2, a ball mill

[0068] Mix the initial powder obtained in step 1 evenly in a ball mill for 2 hours;

[0069] Step 3. Pre-burning

[0070] Dry the ball abrasive obtained in step 2, and place it in a sintering furnace for pre-sintering. The pre-sintering temperature is 900° C., and the pre-sintering time is 4 hours. After completion, the temperature is naturally lowered to room temperature with the furnace to obtain a pre-sintered powder;

[0071] Step 4, secondary ball milling

[0072] Add addit...

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Abstract

The invention discloses a high-power torque ferrite material for Ku wave band and a preparation method thereof, belonging to the technical field of ferrite material preparation. The ferrite material includes the main material and additives, the main material Li 0.5+0.5x‑ 0.5y Ti x Zn y mn 0.06 Fe (2.44‑1.5x‑0.5y)(1‑z) o 4‑1.5(2.44‑1.5x‑0.5y)z , x=0.15~0.25, y=0.04~0.06, z=0.04~0.06; additives are calculated in terms of mass percentage of main components and oxides: 0.05~0.20wt% CaCO 3 , 0.20~0.80wt% Bi 2 o 3 , 0.01~0.10wt%V 2 o 5 . The twist ferrite material of the invention has suitable saturation magnetization and spin wave line width, high Curie temperature, high remanence ratio, low coercive force, low ferromagnetic resonance line width and low dielectric loss.

Description

technical field [0001] The invention belongs to the technical field of ferrite material preparation, and in particular relates to a high-power LiTiZn torque ferrite material for Ku-band ferrite switches and phase shifters and a preparation method thereof. Background technique [0002] With the development of radar technology, microwave / millimeter wave devices such as switches and phase shifters in phased array radar are developing in the direction of high power, high precision and high frequency. Due to the saturation magnetization (4πM s ) wide adjustable range, Curie temperature (T c ) high and remanence ratio (B r / B m ) are high and are widely used in ferrite switches or phase shifters in the X-band and above. For Ku-band high-power ferrite switches or phase shifters, due to the high carrying power, it is easy to cause sparking and heating problems in ferrite materials, which requires ferrite materials not only to have suitable saturation magnetization, High remanen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/63H01F1/34
CPCC04B35/2633C04B35/622C04B35/6303C04B2235/3203C04B2235/3232C04B2235/3239C04B2235/3263C04B2235/3272C04B2235/3284C04B2235/3298C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567H01F1/34
Inventor 蒋晓娜刘小龙余忠孙科邬传健兰中文
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA