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Spinel Li-series ferrite materials for X-band to mm-wave band lock-in phase shifters

A ferrite material and millimeter wave technology, applied in the field of microwave technology and magnetic materials, can solve the problem of high remanence ratio, low coercivity, low coercivity, high remanence ratio, high Curie temperature and high power capacity and other problems, to achieve high remanence ratio, improvement of remanence ratio, and increase the effect of spin wave linewidth

Active Publication Date: 2021-07-13
SOUTHWEST INST OF APPLIED MAGNETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention mainly aims at the technical problems of low coercive force, high remanence ratio, high Curie temperature and high power bearing capacity existing in ferrite materials used in x-band to millimeter-wave band microwave devices, and provides a Trace Cu 2+ 、Co 3+ The formula design of the substituted Li-based ferrite material has the characteristics of low coercive force, high remanence ratio and high Curie temperature under the condition of high spin wave linewidth

Method used

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  • Spinel Li-series ferrite materials for X-band to mm-wave band lock-in phase shifters
  • Spinel Li-series ferrite materials for X-band to mm-wave band lock-in phase shifters
  • Spinel Li-series ferrite materials for X-band to mm-wave band lock-in phase shifters

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Spinel Li-based ferrite material for x-band to millimeter-wave band lock-in phase shifter, single-phase spinel structure, its composition chemical formula is,

[0021] Li 0.5(1-a+b-c-d-e) Zn a Mg e Ti b Cu c co d Bi n mn m Fe 0.5(5-a-3b-c-d-e)-m-n-δ o 4 ,

[0022] Where a=0.12, b=0.3, c=0.004, d=0.002, e=0.3, m=0.08, n=0.003, δ=0.02; calculate the required amount of each raw material according to the molecular formula. Use analytically pure Fe 2 o 3 , CuO, ZnO, Co 2 o 3 ,TiO 2 , MgO, MnCO 3 , Bi 2 o 3 , Li 2 CO 3 Raw materials, after treatment, calculate and weigh the corresponding weight according to the formula; once ball milled for 5 hours, mix evenly and then dry; pre-fire at 820°C, keep warm for 5 hours; then dry after the second ball mill for 5 hours, add 10% polyethylene Alcohol granulation, sintering at 980°C after molding, heat preservation for 5 hours; finally perform performance parameter test.

[0023] Apparent Density ρ of Materials Tes...

Embodiment 2

[0027] Spinel Li-based ferrite materials for lock-in phase shifters from x-band to millimeter-wave bands, single-phase spinel structure, and its composition chemical formula is:

[0028] Li 0.5(1-a+b-c-d-e) Zn a Mg e Ti b Cu c co d Bi n mn m Fe 0.5(5-a-3b-c-d-e)-m-n-δ o 4 ,

[0029] Where a=0.11, b=0.27, c=0.005, d=0.006, e=0.29, m=0.07, n=0.003, δ=0.04; calculate the required amount of each raw material according to the molecular formula. Use analytically pure Fe 2 o 3 , CuO, ZnO, Co 2 o 3 ,TiO 2 , MgO, MnCO 3 , Bi 2 o 3 , Li 2 CO 3 Raw materials, after treatment, calculate and weigh the corresponding weight according to the formula; once ball milled for 5 hours, mix evenly and then dry; pre-fire at 820°C, keep warm for 5 hours; then dry after the second ball mill for 5 hours, add 10% polyethylene Alcohol granulation, sintering at 980°C after molding, heat preservation for 5 hours; finally perform performance parameter test.

[0030] Apparent Density ρ of...

Embodiment 3

[0034] Spinel Li-based ferrite materials for lock-in phase shifters from x-band to millimeter-wave bands, single-phase spinel structure, and its composition chemical formula is:

[0035] Li 0.5(1-a+b-c-d-e) Zn a Mg e Ti b Cu c co d Bi n mn m Fe 0.5(5-a-3b-c-d-e)-m-n-δ o 4 ,

[0036] Where a=0.15, b=0.25, c=0.002, d=0.003, e=0.1, m=0.06, n=0.002, δ=0.06; calculate the required amount of each raw material according to the molecular formula. Use analytically pure Fe 2 o 3 , CuO, ZnO, TiO 2 , MnCO 3 ,Co 2 o 3 , Bi 2 o 3 , Li 2 CO 3 Raw materials, after treatment, calculate the corresponding weight according to the formula; once ball mill for 5 hours, mix evenly and then dry; pre-burn at 830°C, keep warm for 5 hours; then dry after the second ball mill for 5 hours, add 10% polyethylene Alcohol granulation, sintering at 990°C after molding, heat preservation for 5 hours; finally perform performance parameter test.

[0037] Measuring the Apparent Density ρ of Mat...

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Abstract

The invention discloses a spinel Li-based ferrite material used for a lock-type phase shifter from the x-band to the millimeter-wave band, and its composition chemical formula is Li 0.5(1‑a+b‑c‑d‑e) Zn a Mg e Ti b Cu c co d Bi n mn m Fe 0.5(5‑a‑3b‑c‑d‑e)‑m‑n‑δ o 4 , where: 0≤a≤0.4, 0≤b≤0.5, 0.002≤c≤0.006, 0.002≤d≤0.008, 0≤e≤0.5, 0.03≤m≤0.08, 0.002≤n≤0.006, δ is iron deficiency , 0.02≤δ≤0.08. The present invention uses a small amount of Cu 2+ Replace Li 0.5 Fe 2.5 o 4 Department of Li 1+ and Fe 3+ , which reduces the coercive force of the material and increases the remanence ratio of the material; adding an appropriate amount of Co 3+ , improve the power bearing capacity of the material. Realized the residual magnetic induction of microwave ferrite material B r Between 148mT and 343mT, the spin wave linewidth ΔH k 400~800A / m, coercive force H c ≤80A / m, remanence ratio R is 0.89~0.96, Curie temperature T c The temperature is 450°C to 500°C. At the same time, the material has low electromagnetic loss characteristics and can be used for high-power lock-in phase shifters from the x-band to the millimeter-wave band.

Description

technical field [0001] The invention belongs to the field of microwave technology and magnetic materials, and is a spinel Li-based ferrite material with strong power bearing capacity, low coercive force, high remanence ratio, low loss and high Curie temperature characteristics, and satisfies the x-band Gyromagnetic materials used in high-power lock-in phase shifters and switches in millimeter-wave band microwave systems. Background technique [0002] The microwave ferrite material used in the microwave lock-in phase shifter not only requires the material to have a suitable residual magnetic induction intensity, small electrical loss and magnetic loss, and a high Curie temperature, but more importantly, the material should have a high residual magnetic ratio, low coercive force and corresponding high power handling capacity. [0003] Ferrite devices in the x-band to millimeter-wave bands generally use spinel ferrite materials. Spinel ferrite materials are divided into two c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622H01P1/19
CPCC04B35/265C04B35/622C04B2235/3203C04B2235/3206C04B2235/3232C04B2235/3262C04B2235/3274C04B2235/3275C04B2235/3281C04B2235/3284C04B2235/3298H01P1/19
Inventor 袁红兰冯涛任仕晶
Owner SOUTHWEST INST OF APPLIED MAGNETICS
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