Production method of garnet microwave ferrite with narrow line width and high dielectric constant

A technology with high dielectric constant and manufacturing method, which is applied in the field of microwave technology and magnetic materials, can solve the problems of low dielectric constant and low Curie temperature, etc., and achieve the effect of facilitating debugging and improving debugging efficiency

Inactive Publication Date: 2013-03-20
东阳富仕特磁业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly aims at the problems of low dielectric constant and low Curie temperature in existing narrow-linewidth yttrium-c

Method used

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  • Production method of garnet microwave ferrite with narrow line width and high dielectric constant
  • Production method of garnet microwave ferrite with narrow line width and high dielectric constant
  • Production method of garnet microwave ferrite with narrow line width and high dielectric constant

Examples

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Effect test

example 1

[0030] The manufacturing process is: 1) Raw material processing → 2) Calculation and weighing according to the formula → 3) Primary ball milling (raw material mixing) → 4) Pre-calcination → 5) Secondary ball milling → 6) Drying and granulation → 7) Compression molding → 8) Sintering.

[0031] ①According to the chemical formula

[0032] Y 3-x′-2x-z-p-q Bi x′ Ca 2x+z+p+q V x Gez In y sn p Ti q mn w Al w′ Fe 5-x-y-z-p-q-w-w′-δ o 12

[0033] Take: x=0.15;y=0;z=0.07;x'=0;p=0.20;q=0.05;w=0;w'=0, calculate the required raw materials. Use Y with a purity of ≥99.9% and burnt treatment 2 o 3 , and analytically pure Fe 2 o 3 ,CaCO 3 ,V 2 o 5 ,GeO 2 ,SnO 2 , TiO 2 As the raw material, weigh out the corresponding weight of the raw material. ② Put the weighed raw materials into the ball mill jar, and add stainless steel balls and alcohol according to the ratio of material: ball: alcohol = 1: 3: 1, and discharge the material after 12 hours of ball milling. The ball mi...

example 2

[0038] ①According to the chemical formula

[0039] Y 3-x′-2x-z-p-q Bi x′ Ca 2x+z+p+q V x Ge z In y sn p Ti q mn w Al w′ Fe 5-x-y-z-p-q-w-w′-δ o 12

[0040] Take: x=0.23;y=0.10;z=0.10;p=0.12;q=0.05;x′=0;w=0;w′=0, and calculate the required raw materials. Use Y with purity ≥ 99.9% and burnt treatment 2 o 3 and analytically pure Fe 2 o 3 ,CaCO 3 ,V 2 o 5 ;In 2 o 3 ,SnO 2 , TiO 2 ,GeO 2 As the raw material, weigh out the corresponding weight of the raw material. ② Put the weighed raw materials into a ball mill jar, and add steel balls and alcohol according to the ratio of material: balls: alcohol = 1: 3: 1.0, and discharge after 12 hours of ball milling. The ball milling tank is made of stainless steel to reduce the abrasive Fe entering the material during the ball milling process. After the slurry is dried, pass through a 30-mesh sieve and put it into a special sagger. ③Put the sagger containing the powder into a furnace with an oxidizing atmosphere for...

example 3

[0045] ①According to the chemical formula

[0046] Y 3-x′-2x-z-p-q Bi x′ Ca 2x+z+p+q V x Ge z In y sn p Ti q mn w Al w′ Fe 5-x-y-z-p-q-w-w′-δ o 12

[0047] Take: x=0.20; x′=0.45; y=0; z=0.05; p=0.20; q=0.05; w=0; w′=0, and calculate the required raw materials. Use Y with a purity of ≥99.9% and burnt treatment 2 o 3 and analytically pure Bi 2 o 3 , Fe 2 o 3 ,CaCO 3 ,V 2 o 5 ,SnO 2 ; TiO 2 ; GeO 2 As the raw material, weigh out the corresponding weight of the raw material. ② Put the weighed raw materials into the ball mill jar, and add stainless steel balls and alcohol according to the ratio of material: ball: alcohol = 1: 3: 1, and discharge the material after 12 hours of ball milling. The ball milling tank is made of stainless steel to reduce Fe worn during ball milling into the material. The slurry is dried and passed through a 30-mesh sieve, and put into a special corundum crucible. ③Put the corundum crucible with the powder into a furnace with an ...

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Abstract

The invention discloses a production method of a garnet microwave ferrite with a narrow line width and a high dielectric constant. The amount of various raw materials is calculated according to the chemical formula of the microwave ferrite of Y[3-x'-2x-z-p-q]Bi[x']Ca[2x+z+p+q]V[x]Ge[z]In[y]Sn[p]Ti[q]Mn[w]Al[w']Fe[5-x-y-z-p-q-w-w'-sigma]O[12]. The microwave ferrite is prepared from Y2O3, Fe2O3, CaCo3, Bi2O3, V2O5, GeO2, In2O3, SnO2, TiO2, Al(OH)3, and MnCO3 as the raw materials, wherein the purity of the Y2O3 is larger than or equal to 99.9%, the Fe2O3, CaCo3, Bi2O3, V2O5, GeO2, In2O3, SnO2, TiO2, Al(OH)3, and MnCO3 are analytical reagents, x is lager than or equal to 0 and less than or equal to 1.5, y is larger than or equal to 0 and less than or equal to 0.70, z is larger than or equal to 0 and less than or equal to 1.3, x' is larger than or equal to 0 and less than or equal to 1.20, p is larger than or equal to 0 and less than or equal to 0.7, q is larger than or equal to 0 and less than or equal to 0.70, w is larger than or equal to 0 and less than or equal to 1.30, w' is larger than or equal to 0 and less than or equal to 0.50, and sigma refers to iron deficiency amount and is larger than or equal to 0 and less than or equal to 0.50. The microwave ferrite is formed in a sintering mode. Ti4+ and Bi3+ are added in the formula, and ions such as In3+, Sn4+, Ti4+ jointly replace octahedral Fe3+, Bi3+ is used for partially replacing dodecahedral Y3+, and therefore the dielectric constant epsilon' is effectively increased. Introduction of the Bi3+ has functions of enhancing superexchange of Fe-O-Fe and raising the Curie temperature.

Description

technical field [0001] The invention belongs to the field of microwave technology and magnetic materials, in particular to the technology of garnet microwave ferrite materials. Background technique [0002] The official commercial operation of 3G mobile communication and the pilot operation of 4G have brought huge market demand for high-performance microwave ferrite materials and circulators / isolators for communication. 3G and 4G mobile communications use higher frequency bands and faster data transmission rates. Correspondingly, the insertion loss, isolation, temperature stability, intermodulation distortion and other performances of microwave ferrite circulators / isolators widely used in base station systems put forward higher requirements. The microwave ferrite material is the core of the circulator / isolator. The requirements for the microwave ferrite material for the circulator and isolator used in 3G and 4G base stations are: 1) Saturation magnetization (4πM s ) to mee...

Claims

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Application Information

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IPC IPC(8): C04B35/40C04B35/622
Inventor 韩志全王天进张方远
Owner 东阳富仕特磁业有限公司
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