CN103664154A - Formula and process of Li-Ti-Zn soft magnetic ferrite material with high frequency and high resistivity - Google Patents
Formula and process of Li-Ti-Zn soft magnetic ferrite material with high frequency and high resistivity Download PDFInfo
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- CN103664154A CN103664154A CN201210352425.XA CN201210352425A CN103664154A CN 103664154 A CN103664154 A CN 103664154A CN 201210352425 A CN201210352425 A CN 201210352425A CN 103664154 A CN103664154 A CN 103664154A
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Abstract
The invention discloses a formula and process of a Li-Ti-Zn soft magnetic ferrite material with high frequency and high resistivity, relating to the physical technical field of soft magnetic ferrites. According to the formula, the Li-Ti-Zn soft magnetic ferrite material comprises 50-65mol% of Fe2O3, 1-4mol% of MnO, 10-20mol% of ZnO, 1-4mol% of TiO2, 0.1-0.5mol% of Co2O3, 15-28mol% of Li2CO3 and 0.2-0.8mol% of Bi2O3. The design originality of the formula is as follows: NiO in a nickel-zinc ferrite is replaced with LiCO3 on the premise that the performance of a product is unchanged, so that the production cost is greatly reduced, and the favorable economic benefit and social value are achieved.
Description
Technical field:
The present invention relates to soft magnetic ferrite physical technique field, be 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 compared with proven technique, MnZn Ferrite Material is used 1MHZ to make below inductance ratio conventionally, transformer, concussion circle magnetic core, accounts for 20% of soft magnetic ferrite market, also be the low soft magnetic ferrite of price comparison, but there is following defect in the ferritic technology of MnZn: below the high 1MHZ of being limited to of frequency of utilization, and resistivity is low, and Curie temperature is less than 300 ℃, equipment investment is high, and technology difficulty is large; And NiZn soft magnetic ferrite, resistivity can reach 10
6high-frequency loss is little, Curie temperature high (being less than 500 ℃), and production unit is simpler than MnZn, sintering in air, magnetic permeability is 8～3000, applies extensively especially, is only second to MnZn material, but NiZn ferrite is porous material, moisture-sensitive, is used metal oxide containing precious metals material NiO, and manufacturing cost is high; MnZn Ferrite Material, can partly replace NiZn ferrite, and for 10～100MHz frequency range, technique and NiZn are basic identical, up to the present, Ferrite Material is only limited to deflecting core application, and EMI/RFI magnetic core, low price, filtering performance is poor, and electromagnetic performance is not as NiZn; LiZn soft magnetic ferrite Curie temperature is high, and resistivity is high, and 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 fields, complex manufacturing, and difficulty is large.
Summary of the invention:
The object of this invention is 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 LiCO
3substitute the NiO in nickel-zinc ferrite, significantly reduced material cost, reduced sintering temperature, thereby saved the energy, there is good economical effectiveness and social value.
The present invention has that Curie temperature is high, a
flittle, λ
sand K
1also lower, also lower to application susceptibility.The present invention has carried out ion exchange, as Ti, Zn, Mn, Ni, Co etc., by displacement, can obtain the needed electromagnetic property that has using value, meet consumers' demand, and the Li that what is more important the present invention uses
2cO
3cost only has 25% of NiO, and compares NiFeO
2material 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 magnetism field, on documents and materials and textbook, also cannot consult.
In order to solve the existing problem of background technology, the present invention is by the following technical solutions:
Formula of the present invention is: Fe
2o
3(50～65mol%), MnO (1～4mol%), ZnO (10～20mol%), TiO
2(1～4mol%), Co
2o
3(0.1～0.5mol%), Li
2cO
3(15～28mol%), Bi
2o
3(0.2～0.8mol%).
Technical process of the present invention is: 1, batch mixing: by Fe
2o
3, Li
2cO
3, MnO, ZnO, TiO
2, Co
2o
3, Bi
2o
3by above-mentioned formula, adopt sand mill batch mixing, disperse means are deionized water, material: ball: water=1: 0.8: 5, and mixing time 2 hours, centrifuge dehydration is dried broken, crosses 20 mesh sieves;
2, pre-burning: equipment is air pushed bat kiln (17m), 800 ℃～950 ℃ of presintering room temperatures;
3, abrasive material: adopt 300kg ball mill, Hc >=60, material: water: ball=1: 0.7～0.9: 4, Ball-milling Time is 18 to 24 hours, centrifuge dehydration is dried;
4, granulation: adopt machinery to carry out granulation, tackiness agent is Pcv-1788, Pcv: deionized water=500kg: 45kg, automatic stirring heating for dissolving, broken 70 mesh sieves of crossing of material piece, powder: material: tackiness agent=100: 10: 12, repeatedly roll 3 to 4 times, damping (water content approximately 6%) fragmentation is sieved;
5, moulding: by particulate material damping, water content approximately 3% ± 0.5, adds Zinic stearas 1～1.5%, adopts mixer batch mixing 10～15 minutes, then by 60～140 mesh sieves, particulate material meets forming requirements, compacting mark ring and product.
6, sintering: adopt air pushed bat kiln, sintering temperature is 800 ℃～1000 ℃.
The present invention has following beneficial effect: it has substituted nickel oxide with Quilonum Retard in original formula, has reduced material cost, also enhances product performance, and good product consistency, has saved the energy, has good economical effectiveness and social value.
Embodiment:
This embodiment is taked following technical scheme: the formula of this embodiment is: Fe
2o
3(50～65mol%), MnO (1～4mol%), ZnO (10～20mol%), TiO
2(1～4mol%), Co
2o
3(0.1～0.5mol%), Li
2cO
3(15～28mol%), Bi
2o
3(0.2～0.8mol%).
The technical process of this embodiment is: 1, batch mixing: by Fe
2o
3, Li
2cO
3, MnO, ZnO, TiO
2, Co
2o
3, Bi
2o
3by above-mentioned formula, adopt sand mill batch mixing, disperse means are deionized water, material: ball: water=1: 0.8: 5, and mixing time 2 hours, centrifuge dehydration is dried broken, crosses 20 mesh sieves;
2, pre-burning: equipment is air pushed bat kiln (17m), 800 ℃～950 ℃ of presintering room temperatures;
3, abrasive material: adopt 300kg ball mill, Hc >=60, material: water: ball=1: 0.7～0.9: 4, Ball-milling Time is 18 to 24 hours, centrifuge dehydration is dried;
4, granulation: adopt machinery to carry out granulation, tackiness agent is Pcv-1788, Pcv: deionized water=500kg: 45kg, automatic stirring heating for dissolving, broken 70 mesh sieves of crossing of material piece, powder: material: tackiness agent=100: 10: 12, repeatedly roll 3 to 4 times, damping (water content approximately 6%) fragmentation is sieved;
5, moulding: by particulate material damping, water content approximately 3% ± 0.5, adds Zinic stearas 1～1.5%, adopts mixer batch mixing 10～15 minutes, then by 60～140 mesh sieves, particulate material meets forming requirements, compacting mark ring and product.
6, sintering: adopt air pushed bat kiln, sintering temperature is 800 ℃～1000 ℃.
This embodiment has following beneficial effect: the originality of its formulating of recipe is, is guaranteeing to use LiCO under the constant prerequisite of product performance
3replace the NiO in nickel-zinc ferrite, thereby significantly reduced production cost, there is good economical effectiveness and social value.
Claims (2)
1. high frequency high resistivity Li-Ti-Zn soft magnetic ferrite formula and technique, is characterized in that its formula is: Fe
2o
3(50～65mol%), MnO (1～4mol%), ZnO (10～20mol%), TiO
2(1～4mol%), Co
2o
3(0.1～0.5mol%), Li
2cO
3(15～28mol%), Bi
2o
3(0.2～0.8mol%), wherein uses LiCO
3substituted the NiO in nickel-zinc ferrite.
2. high frequency high resistivity Li-Ti-Zn soft magnetic ferrite formula according to claim 1 and technique, is characterized in that its technical process is: (1), batch mixing: by Fe
2o
3, Li
2cO
3, MnO, ZnO, TiO
2, Co
2o
3, Bi
2o
3by above-mentioned formula, adopt sand mill batch mixing, disperse means are deionized water, material: ball: water=1: 0.8: 5, and mixing time 2 hours, centrifuge dehydration is dried broken, crosses 20 mesh sieves; (2), pre-burning: equipment is air pushed bat kiln, 800 ℃～950 ℃ of presintering room temperatures; (3), abrasive material: adopt 300kg ball mill, Hc>=60, material: water: ball=1: 0.7～0.9: 4, Ball-milling Time is 18 to 24 hours, centrifuge dehydration is dried; (4), granulation: adopt machinery to carry out granulation, tackiness agent is Pcv-1788, Pcv: deionized water=500kg: 45kg, automatic stirring heating for dissolving, broken 70 mesh sieves of crossing of material piece, powder: material: tackiness agent=100: 10: 12, repeatedly roll 3～4 times, damping, fragmentation is sieved; (5), moulding: by particulate material damping, water content 3% ± 0.5, adds Zinic stearas 1～1.5%, adopts mixer batch mixing 10～15 minutes, then by 60～140 mesh sieves, particulate material meets forming requirements, compacting mark ring and product; (6), sintering: adopt air pushed bat kiln, sintering temperature is 800 ℃～1000 ℃.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104150893A (en) * | 2014-03-15 | 2014-11-19 | 南通保来利轴承有限公司 | Permanent magnetic ferrite material for direct current motor and preparation method of permanent magnetic 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 |
| 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 |
| CN107680771A (en) * | 2016-09-09 | 2018-02-09 | 杨甫进 | Clamping method of the soft magnetism green compact on digital-controlled carving machine |
| CN107680770A (en) * | 2016-09-09 | 2018-02-09 | 杨甫进 | Soft magnetic ferrite green compact Carving Machining technique |
| CN109437879A (en) * | 2018-12-06 | 2019-03-08 | 西南应用磁学研究所 | X wave band is to millimeter wave band latching phase shifter spinelle Li series ferrite material |
| CN112239358A (en) * | 2020-10-30 | 2021-01-19 | 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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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150893A (en) * | 2014-03-15 | 2014-11-19 | 南通保来利轴承有限公司 | Permanent magnetic ferrite material for direct current motor and preparation method of permanent magnetic ferrite material |
| 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 |
| 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 |
| 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 |
| 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 |
| CN107680771A (en) * | 2016-09-09 | 2018-02-09 | 杨甫进 | Clamping method of the soft magnetism green compact on digital-controlled carving machine |
| CN107680770A (en) * | 2016-09-09 | 2018-02-09 | 杨甫进 | Soft magnetic ferrite green compact Carving Machining technique |
| 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 |
| CN109437879A (en) * | 2018-12-06 | 2019-03-08 | 西南应用磁学研究所 | X wave band is to millimeter wave band latching phase shifter spinelle Li series ferrite material |
| 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 |
| CN112239358A (en) * | 2020-10-30 | 2021-01-19 | 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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