Components and preparing process of VHF plate sensor material

A VHF laminated chip and formula technology, applied in the direction of magnetic materials, inorganic material magnetism, electrical components, etc., can solve the problems of complex powder process, high cost, poor material performance, etc., and achieve simple process and low cost. , The effect of wide firing temperature range

Inactive Publication Date: 2003-02-19
TSINGHUA TONGFANG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of powder by this chemical method is more complicated, the cost is relatively high, and the material performance is poor.

Method used

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  • Components and preparing process of VHF plate sensor material
  • Components and preparing process of VHF plate sensor material
  • Components and preparing process of VHF plate sensor material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Synthesis of planar hexagonal Z-type soft magnetic ferrite Ba by solid state method 3 co 1.0 Zn 0.8 Cu 0.2 Fe 23 MnO 41 , The sintering aids are bismuth oxide and silicon oxide. Initial raw material BaCO 3 ,Co 3 o 4 , ZnO, CuO, Mn 2 o 3 , Fe 2 o 3 , Weighed 59.20g, 8.03g, 6.511g, 1.591g, 7.89g, 183.6g respectively according to the stoichiometric ratio. Mix ball milling for 24 hours, after drying, pre-sinter at 1000-1300°C to form Z-shaped soft ferrite. Take 20 grams of ferrite powder, add sintering aid, the content is 3% by weight of the total material, mix through ball milling for 24 hours, after drying, pass through 100~200 mesh sieve, shape, at 870°C, 890°C, 920°C ℃ sintering for 6 hours, respectively recorded as samples 1-1, 1-2, 1-3. A ring sample has an outer diameter of 20mm, an inner diameter of 10mm, a thickness of 3mm, and a molding pressure of 7MPa; a disc sample has a diameter of 10mm, a thickness of 1mm, and a molding pressure of 2MPa. The el...

Embodiment 2

[0030] Synthesis of planar hexagonal Z-type soft magnetic ferrite Ba by solid state method 1.5 Sr 1.5 co 2 Fe 23 MnO 41 , The sintering aids are boron oxide and lead oxide. Initial raw material BaCO 3 , SrCO 3 ,Co 3 o 4 , Mn 2 o 3 , Fe 2 o 3 , Weighed 29.60g, 22.14g, 16.05g, 7.89g, 183.6g respectively according to the stoichiometric ratio. Mix ball milling for 24 hours, after drying, pre-sinter at 1000-1300°C to form Z-shaped soft ferrite. Take 20 grams of ferrite powder, add sintering aid, the content is 3, 6, 9% by weight of the total material, mix by ball milling for 12 hours, after drying, pass through a 100-200 mesh sieve, shape, at 890 ℃ sintering for 6 hours, respectively recorded as samples 2-1, 2-2, 2-3. A ring sample has an outer diameter of 20mm, an inner diameter of 10mm, a thickness of 3mm, and a molding pressure of 7MPa; a disc sample has a diameter of 10mm, a thickness of 1mm, and a molding pressure of 2MPa. The electrical resistivity of the fired...

Embodiment 3

[0035] Synthesis of planar hexagonal Z-type soft magnetic ferrite Ba by solid state method 3 co 2 Fe 24 o 41 , The burning aid is lead fluoride. Initial raw material BaO, Co 3 o 4 , Fe 2 o 3 , Weighed 45.96g, 16.05g, and 191.6g respectively according to the stoichiometric ratio. Mix ball milling for 24 hours, after drying, pre-sinter at 1000-1300°C to form Z-shaped soft ferrite. Take 20 grams of ferrite powder, add sintering aid, the content is 6% by weight of the total material, mix by ball milling for 24 hours, after drying, pass through a 100-200 mesh sieve, shape, and sinter at 890 ° C for 4 , 8 hours, respectively recorded as samples 3-1, 3-2. A ring sample has an outer diameter of 20mm, an inner diameter of 10mm, a thickness of 3mm, and a molding pressure of 7MPa; a disc sample has a diameter of 10mm, a thickness of 1mm, and a molding pressure of 2MPa. The electrical resistivity of the fired tiles was measured after being covered with silver from top to bottom....

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Abstract

This invention relates to a formula of a VHF inductive chip material and its preparation method. There is not high performance low temp sintered ferrite materials at present so we have to use low dielectric ceramics as the medium instead to produce low inductance multi-chip inductors. The basis of the said material is a plane hexagon soft magnet ferrite matched with low temp combustion adjuvant processed by the solid phase reactance synthesis and the combustion adjuvant is applied with two times of doping VHF inductive material of excellent performance is got after ballmill, baking, preroast, ballmill, baking, granulation, formation sintering, realizing low temp sintering with temp below 900 deg.c.

Description

(1) Technical field [0001] The invention relates to a formula and a preparation method of a high-performance low-heat very high-frequency laminated chip inductor material, belonging to the field of material technology. (2) Background technology [0002] Multilayer Chip Inductors or Multilayer Ferrite Inductors (MLCI or MLFI for short) are monolithic structures in which ferrite materials are co-fired with internal spiral series electrodes. The key to its process technology is the co-firing of the magnetic dielectric material (soft ferrite) and the inner conductor material (silver is the best choice in terms of electrical conductivity and cost). This requires that the soft ferrite has a low sintering temperature, high permeability and high quality factor. At present, the chip inductor materials at home and abroad are mainly NiZnCu low-fired ferrite and low-kilometer ceramics. The operating frequency of NiZnCu low-fired ferrite materials and devices is generally below 200MHz....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/00H01F1/34H01F1/37
CPCH01F1/37C04B2235/3267C04B2235/3239C04B35/6261C04B2235/3281C04B2235/3409C04B2235/3265C04B35/2633C04B2235/36C04B2235/3215C04B35/265C04B2235/6567C04B2235/3277C04B2235/3213C04B2235/3203C04B2235/3262C04B2235/327C04B2235/3298C04B2235/3418C04B2235/3296C04B2235/3284C04B2235/3208C04B2235/767C04B2235/604H01F1/348C04B2235/656C04B2235/445
Inventor 王晓慧李龙土周济苏水源桂治轮岳振星马振伟张力
Owner TSINGHUA TONGFANG CO LTD
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