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Hexagonal ferrite material for quasi-planar microstrip circulator, and preparation method thereof

A hexagonal ferrite and circulator technology, applied in the manufacture of inductors/transformers/magnets, inorganic material magnetism, waveguide devices, etc., can solve problems such as low temperature stability, low remanence ratio, high ferromagnetic resonance line width, etc.

Active Publication Date: 2020-12-08
南京国睿微波器件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the properties of hexagonal ferrite materials still have problems such as high ferromagnetic resonance linewidth, low remanence ratio, and low temperature stability.

Method used

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  • Hexagonal ferrite material for quasi-planar microstrip circulator, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 829g Fe 2 o 3 , 89g BaCO 3 , 73g La 2 o 3 , 32g Sc 2 o 3 Put them into a ball mill and add deionized water to grind and pulverize. The time of ball milling is 8h, and the speed of ball mill is 70r / min. After mixing the pulverized components evenly, put them in an oven at 120°C for 24h; The final components are put into the furnace for calcination. The calcination method is programmed calcination. The heating rate is 50°C / h at the 0th to 4th hour, and 92°C / h at the 4th to 11th hour. The temperature was raised to 1250°C for 4 hours; after the heat preservation, it was naturally cooled down to room temperature with the air in the furnace; the calcined components were put into a ball mill, and additives 30g CuO and 25g Bi were added 2 o 3 , 6g SiO 2 , 6g CaCO 3 Grinding and pulverizing with distilled water, the time of ball milling is 18h, and the rotating speed of ball mill is 70r / min; the slurry after grinding is dehydrated, and the water content is control...

Embodiment 2

[0032] Weigh 813g Fe 2 o 3 , 89g BaCO 3 , 73g La 2 o 3 , 32g Sc 2 o 3 Put them into a ball mill and add deionized water to grind and pulverize. The time of ball milling is 8h, and the speed of ball mill is 70r / min. After mixing the pulverized components evenly, put them in an oven at 120°C for 24h; The final components are put into the furnace for calcination. The calcination method is programmed calcination. The heating rate is 50°C / h at the 0th to 4th hour, and 92°C / h at the 4th to 11th hour. The temperature was raised to 1250°C for 4 hours; after the heat preservation, it was naturally cooled down to room temperature with the air in the furnace; the calcined components were put into a ball mill, and additives 30g CuO and 25g Bi were added 2 o 3Grinding and pulverizing with distilled water, the time of ball milling is 18h, and the rotating speed of ball mill is 70r / min; the slurry after grinding is dehydrated, and the water content is controlled at about 20%; The bla...

Embodiment 3

[0034] Weigh 842g Fe 2 o 3 , 124g BaCO 3 , 44g La 2 o 3 , 18g Sc 2 o 3 Put them into a ball mill and add deionized water to grind and pulverize. The time of ball milling is 8h, and the speed of ball mill is 70r / min. After mixing the pulverized components evenly, put them in an oven at 120°C for 24h; The final components are put into the furnace for calcination. The calcination method is programmed calcination. The heating rate is 50°C / h at the 0th to 4th hour, and 92°C / h at the 4th to 11th hour. The temperature was raised to 1250°C for 4 hours; after the heat preservation, it was naturally cooled down to room temperature with the air in the furnace; the calcined components were put into a ball mill, and additives 30g CuO and 25g Bi were added 2 o 3 , 6g SiO 2 , 6g CaCO 3 Grinding and pulverizing with distilled water, the time of ball milling is 18h, and the rotating speed of ball mill is 70r / min; the slurry after grinding is dehydrated, and the water content is contro...

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Abstract

The invention discloses a hexagonal ferrite material for a quasi-planar microstrip circulator. The material is composed of a main material and additives, wherein the main material comprises, by weight, 40-90 parts of Fe2O3, 5-10 parts of BaCO3, 1-10 parts of La2O3 and 2-5 parts of Sc2O3; and the additives comprise, by weight, 1-10 parts of CuO and 1-10 parts of Bi2O3. The invention also disclosesthe preparation method of the hexagonal ferrite. The hexagonal ferrite material for the quasi-planar microstrip circulator, prepared by the method, has excellent properties such as relatively high coercive force, low ferromagnetic resonance line width, high Curie temperature and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a hexagonal ferrite material for a quasi-planar microstrip circulator and a preparation method thereof. Background technique [0002] With the continuous development of semiconductor technology and the urgent demand for high-frequency, miniaturized, lightweight, and high-reliability microwave devices in the whole system, radar systems such as spaceborne radar, air defense system, precision guidance, gun sight measurement, and remote early warning The application problems of microstrip circulator are becoming more and more prominent. The main bottleneck restricting the miniaturization, light weight, planarization, and high reliability goals of the microstrip circulator is the self-biased hexagonal ferrite material with low ΔH, high Mr / Ms and high Ha characteristics. [0003] Hexagonal ferrite materials have high coercive force, high remanence ratio and st...

Claims

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Application Information

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IPC IPC(8): C04B35/40C04B35/622C04B35/626C04B35/64H01P1/38H01F41/02H01F1/10
CPCC04B35/2633C04B35/2641C04B35/622C04B35/6261C04B35/64H01P1/38H01F41/0253H01F41/0286H01F1/10C04B2235/3215C04B2235/3227C04B2235/3224C04B2235/3281C04B2235/3298C04B2235/6562C04B2235/6565C04B2235/6567
Inventor 李之琦罗会安王文鑫
Owner 南京国睿微波器件有限公司
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