CN103664154B - High frequency high resistivity Li-Ti-Zn soft magnetic ferrite formula and technique - Google Patents
High frequency high resistivity Li-Ti-Zn soft magnetic ferrite formula and technique Download PDFInfo
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Abstract
High frequency high resistivity Li-Ti-Zn soft magnetic ferrite formula and technique, it relates to soft magnetic ferrite physical technique field, and its formula is: Fe2O3(50～65mol%), MnO (1～4mol%), ZnO (10～20mol%), TiO2(1～4mol%), Co2O3(0.1～0.5mol%), Li2CO3(15～28mol%), Bi2O3(0.2～0.8mol%), the originality of inventive formulation design is, is ensureing to instead of with LiCO3 under the prerequisite that product performance are constant NiO in nickel-zinc ferrite, thus is significantly reducing production cost, is having good economical effectiveness and social value.
Description
Technical field:
The present invention relates to soft magnetic ferrite physical technique field, it is specifically related to a kind of high frequency high resistivity Li-Ti-Zn soft magnetic ferrite formula and technique.
Background technology:
High performance soft magnetic ferrite technology is relatively proven technique, MnZn Ferrite Material uses below 1MHZ to make inductance ratio usually, transformer, concussion circle magnetic core, accounts for the 20% of soft magnetic ferrite market, also it is the low soft magnetic ferrite of price comparison, but there is following defect in the ferritic technology of MnZn: using frequency height to be limited to below 1MHZ, and resistivity is low, Curie temperature is less than 300 DEG C, equipment investment height, technology difficulty is big; And NiZn soft magnetic ferrite, resistivity can reach 106High-frequency loss is little, and Curie temperature height (is less than 500 DEG C), and production unit is simpler than MnZn, sinter in atmosphere, magnetic permeability is 8～3000, and application is extensive especially, is only second to MnZn material, but NiZn ferrite is porous material, moisture-sensitive, it may also be useful to metal oxide containing precious metals material NiO, manufacturing cost height; MnZn Ferrite Material, can partly replace NiZn ferrite, substantially identical for 10～100MHz frequency range, technique and NiZn, up to the present, Ferrite Material is only limited to deflection magnetic core application, and EMI/RFI magnetic core, price is cheap, and filtering performance is poor, and electromagnetic performance is not as NiZn; LiZn soft magnetic ferrite Curie temperature height, resistivity height, sintering temperature is low, and production unit is relatively simple, energy-conservation, can replace expensive NiZn Ferrite Material, but under hot conditions, Li easily volatilizees in a lot of field, and complex manufacturing, difficulty is big.
Summary of the invention:
It is an object of the invention to provide a kind of high frequency high resistivity Li-Ti-Zn soft magnetic ferrite formula and technique, the originality of formulating of recipe is to use LiCO3Instead of the NiO in nickel-zinc ferrite, significantly reduce material cost, reduce sintering temperature, thus saved the energy, there is good economical effectiveness and social value.
The present invention has Curie temperature height, aFLittle, λSAnd K1Also lower, application susceptibility is also lower.Invention has been ion exchange, such as Ti, Zn, Mn, Ni, Co etc., the required electromagnetic property having using value can be obtained by displacement, meet consumers' demand, the Li that what is more important the present invention uses2CO3Cost only has the 25% of NiO, and compares NiFeO2Material cost low by 50%. The performance of Li-Ti-Zn soft magnetic ferrite has reached the level of NiZn Ferrite Material. Li-Ti-Zn soft magnetic ferrite is blank on the application foundation of soft magnetic field, also cannot consult in documents and materials and textbook.
In order to solve the problem existing for background technology, the present invention is by the following technical solutions:
The formula of the present invention is: Fe2O3(50～65mol%), MnO (1～4mol%), ZnO (10～20mol%), TiO2(1～4mol%), Co2O3(0.1～0.5mol%), Li2CO3(15～28mol%), Bi2O3(0.2～0.8mol%).
The technical process of the present invention is: 1, batch mixing: by Fe2O3、Li2CO3、MnO、ZnO、TiO2、Co2O3、Bi2O3Adopting sand mill batch mixing by above-mentioned formula, disperse agent is deionized water, material: ball: water=1: 0.8: 5, mixing time 2 hours, and centrifuge dehydration is dried broken, crosses 20 order sieves;
2, pre-burning: equipment is air pushed bat kiln (17m), presintering room temperature 800 DEG C～950 DEG C;
3, abrasive material: adopt 300kg ball mill, Hc >=60, material: water: ball=1: 0.7～0.9: 4, the ball milling time is 18 to 24 hours, centrifuge dehydration, dries;
4, granulation: adopt machinery to carry out granulation, tackiness agent is Pcv-1788, Pcv: deionized water=500kg: 45kg, automatically heating for dissolving is stirred, 70 order sieves are crossed in material block fragmentation, powder: material: tackiness agent=100: 10: 12, rolls 3 to 4 times repeatedly, and damping (water content about 6%) fragmentation is sieved;
5, shaping: by particulate material damping, water content about 3% ± 0.5, adds Zinic stearas 1～1.5%, adopts mixer batch mixing 10～15 minutes, then by 60～140 order sieves, particulate material meets shaping requirement, compacting mark ring and product.
6, sinter: adopting air pushed bat kiln, sintering temperature is 800 DEG C～1000 DEG C.
The present invention has following useful effect: it instead of nickel oxide with Quilonum Retard in original formula, reduces material cost, also enhances product performance, and good product consistency has saved the energy, has good economical effectiveness and social value.
Embodiment:
This embodiment takes following technical scheme: the formula of this embodiment is: Fe2O3(50～65mol%), MnO (1～4mol%), ZnO (10～20mol%), TiO2(1～4mol%), Co2O3(0.1～0.5mol%), Li2CO3(15～28mol%), Bi2O3(0.2～0.8mol%).
The technical process of this embodiment is: 1, batch mixing: by Fe2O3、Li2CO3、MnO、ZnO、TiO2、Co2O3、Bi2O3Adopting sand mill batch mixing by above-mentioned formula, disperse agent is deionized water, material: ball: water=1: 0.8: 5, mixing time 2 hours, and centrifuge dehydration is dried broken, crosses 20 order sieves;
2, pre-burning: equipment is air pushed bat kiln (17m), presintering room temperature 800 DEG C～950 DEG C;
3, abrasive material: adopt 300kg ball mill, Hc >=60, material: water: ball=1: 0.7～0.9: 4, the ball milling time is 18 to 24 hours, centrifuge dehydration, dries;
4, granulation: adopt machinery to carry out granulation, tackiness agent is Pcv-1788, Pcv: deionized water=500kg: 45kg, automatically heating for dissolving is stirred, 70 order sieves are crossed in material block fragmentation, powder: material: tackiness agent=100: 10: 12, rolls 3 to 4 times repeatedly, and damping (water content about 6%) fragmentation is sieved;
5, shaping: by particulate material damping, water content about 3% ± 0.5, adds Zinic stearas 1～1.5%, adopts mixer batch mixing 10～15 minutes, then by 60～140 order sieves, particulate material meets shaping requirement, compacting mark ring and product.
6, sinter: adopting air pushed bat kiln, sintering temperature is 800 DEG C～1000 DEG C.
This embodiment has following useful effect: the originality of its formulating of recipe is, is ensureing to use LiCO under the prerequisite that product performance are constant3Instead of the NiO in nickel-zinc ferrite, thus significantly reduce production cost, there is good economical effectiveness and social value.
Claims (1)
1. high frequency high resistivity Li-Ti-Zn soft magnetic ferrite, it is characterised in that its formula is: 50～65mol%Fe2O3, 1～4mol%MnO, 10～20mol%ZnO, 1～4mol%TiO2, 0.1～0.5mol%Co2O3, 15～28mol%Li2CO3, 0.2～0.8mol%Bi2O3, wherein use Li2CO3Instead of the NiO in nickel-zinc ferrite.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104150893B (en) * | 2014-03-15 | 2016-01-20 | 南通保来利轴承有限公司 | A kind of direct current machine permanent-magnet ferrite material and preparation method thereof |
| CN104788090A (en) * | 2014-05-30 | 2015-07-22 | 安徽华林磁电科技有限公司 | High-performance LiZn ferrite material |
| CN104788088A (en) * | 2014-05-30 | 2015-07-22 | 安徽华林磁电科技有限公司 | LiZn ferrite material with low coercive force |
| CN104129980A (en) * | 2014-07-07 | 2014-11-05 | 宁波海曙欧斯特电子有限公司 | Low-sintering-temperature soft magnetic ferrite material and preparation method thereof |
| CN107680770B (en) * | 2016-09-09 | 2020-05-05 | 南通华兴磁性材料有限公司 | Engraving process for soft magnetic ferrite green body |
| CN107680771B (en) * | 2016-09-09 | 2019-11-29 | 诸暨市烈火工业设计工作室 | Clamping method of the soft magnetism green compact on digital-controlled carving machine |
| CN109437879B (en) * | 2018-12-06 | 2021-07-13 | 西南应用磁学研究所 | Spinel Li-series ferrite material for lock-type phase shifter from x waveband to millimeter wave waveband |
| CN112239358B (en) * | 2020-10-30 | 2022-11-29 | 成都子之源绿能科技有限公司 | Microwave LiZnTiMn gyromagnetic ferrite material and preparation method thereof |
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| CN1810710A (en) * | 2006-02-27 | 2006-08-02 | 乳源瑶族自治县东阳光实业发展有限公司 | Mn-Zn ferrite with wide temperature range and high magnetic conductivity and its prepn process |
| CN101552072A (en) * | 2008-12-31 | 2009-10-07 | 电子科技大学 | Low-loss LiZn ferrite material for phase shifter and preparation method thereof |
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| CN1810710A (en) * | 2006-02-27 | 2006-08-02 | 乳源瑶族自治县东阳光实业发展有限公司 | Mn-Zn ferrite with wide temperature range and high magnetic conductivity and its prepn process |
| CN101552072A (en) * | 2008-12-31 | 2009-10-07 | 电子科技大学 | Low-loss LiZn ferrite material for phase shifter and preparation method thereof |
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