CN1861544A - High frequency low-loss manganese zine ferrite and preparation process thereof - Google Patents
High frequency low-loss manganese zine ferrite and preparation process thereof Download PDFInfo
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- CN1861544A CN1861544A CN 200510039261 CN200510039261A CN1861544A CN 1861544 A CN1861544 A CN 1861544A CN 200510039261 CN200510039261 CN 200510039261 CN 200510039261 A CN200510039261 A CN 200510039261A CN 1861544 A CN1861544 A CN 1861544A
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Abstract
A HF low-loss MnZn ferrite is prepared from Fe2O3, manganese oxide, zinc oxide, disperser, adhesive, and defoaming agent through proportional mixing, drying, precalcining, crushing, pulverizing, grinding, drying again, shaping and sintering.
Description
(1) technical field
The present invention relates to a kind of magneticsubstance and preparation method thereof.Be power transformer and the kickback transformer high frequency low-loss manganese zine ferrite in switch power supply and the audio-visual equipment such as televisor, receiving set specifically.
(2) background technology
Along with the progress of switch power technology, press for and to be fit to the more soft magnetic manganese-zinc ferrite of high workload frequency.Switch power supply operating frequency height, its working efficiency can increase substantially, and can dwindle the volume of power supply, to adapt to the electronics miniaturization development trend.
High frequency ferrite is a critical material of producing AC-DC, DC-DC and various power supplys, and its high frequency characteristics is good, can satisfy the high-frequency work state, and the thermal value of material own is low, temperature rise is little, reliability improves.And present used ferrite, its operating frequency can not be used under high frequency condition below 500KHz, and the scope of application is restricted, and has stoped the progress of power technology.
(3) summary of the invention
The technical problem that the present invention will solve provides a kind of high frequency low-loss manganese zine ferrite.This ferrite, the operating frequency height, temperature rise is little, reliability is high, and the scope of application is unrestricted.
Another technical problem that the present invention will solve provides a kind of preparation method of high frequency low-loss manganese zine ferrite.
For addressing the above problem, the present invention takes following technical scheme:
High frequency low-loss manganese zine ferrite of the present invention contains following raw materials according:
53.8～54.6 moles of % of ferric oxide, 43.0～43.8 moles of % of manganese oxide, 2.4～3.5 moles of % of zinc oxide, dispersion agent 0.6～1.2 weight %, tackiness agent 0.6～2.0 weight %, defoamer 0.2～0.6 weight %.Wherein: said dispersion agent is poly-propionic acid; Said tackiness agent is a polyvinyl alcohol; Said defoamer is a n-Octanol.
The preparation method of preparation high frequency low-loss manganese zine ferrite may further comprise the steps:
(1) mixes
Ferric oxide, manganese oxide, zinc oxide, dispersion agent, defoamer and tackiness agent are dropped in the super mixer, and add the deionized water of 60～150 weight %, mixed 60～90 minutes, obtain the compound that viscosity is 250～350cps;
(2) drying
With spray-drier above-mentioned compound being made granularity is 80～100 microns particle; This particulate moisture and flow angle are respectively 0.1 weight % and 40 degree;
(3) pre-burning
Above-mentioned granular mixture is put into rotary kiln or push-plate type tunnel furnace, and pre-burning is 0.5～3 hour under 800～1000 ℃ temperature;
(4) pulverize
Is 15～20 microns powder with pulverizer to pulverizing 10～40 minutes through the granular mixture of pre-burning, obtaining median size;
(5) grind
The deionized water and the dispersion agent of 0.2～0.6 weight % of remainder, the tackiness agent of 0.5～1.2 weight %, the defoamer of 0.1～0.3 weight % that in above-mentioned powder, add 40～100 weight %, ground 40～90 minutes with the fine grinding machine, obtaining particle diameter is the material of 250～350cps less than 9 microns, viscosity;
(6) after drying
Carry out drying treatment with spray-drier, obtain particle diameter and be 80～200 microns, flow angle particles less than 30 degree; Then, carry out humidification, obtain the particle that water content is 0.5～1.0 weight % with humidifier;
(7) moulding
Carry out moulding with automatic molder, obtain having the blank of definite shape;
(8) sintering
With the push-plate type continuous tunnel furnace in the atmosphere of nitrogen or vacuum control oxygen partial pressure, according to carrying out sintering under following different time sections and the differing temps value: earlier in 1～6 hour, rise to 600 ℃, in 2～4 hours, rise to 1150 ℃ and under this temperature, kept 1～4 hour again by 600 ℃ by room temperature; Afterwards, be warming up to 1310～1340 ℃ again, and under this temperature, be incubated 2.5～4.5 hours; In 3～12 hours, reduce to 150 ℃ then; At last, through mill processing, cleaning, oven dry and coating, obtain high frequency low-loss manganese zine ferrite of the present invention.
Take such scheme, have the following advantages:
Because high frequency low-loss manganese zine ferrite of the present invention contains raw materials such as ferric oxide, manganese oxide, zinc oxide, dispersion agent, tackiness agent and defoamer, and in process of production its grain-size is controlled between 5～10 microns, the feasible ferrite I working frequency of making higher (can reach 1MHz) is traditional ferritic twice.
Because high frequency low-loss manganese zine ferrite operating frequency of the present invention is higher, little with its switch power supply own loss of making, be difficult for heating, temperature rise is little, reliability is high.
Because it is because high frequency low-loss manganese zine ferrite operating frequency of the present invention is higher, little again with its switch power supply volume of making, can adapt to the miniaturization development trend of electronics, the scope of application is wider.
(4) embodiment
First embodiment
Earlier take by weighing raw material according to following proportioning:
53.8 moles of % of ferric oxide, 43.4 moles of % of manganese oxide, 3.5 moles of % of zinc oxide, dispersion agent 0.9 weight %, tackiness agent 0.6 weight %, defoamer 0.4 weight %.Dispersion agent wherein is poly-propionic acid, and tackiness agent is a polyvinyl alcohol, and defoamer is a n-Octanol.
Then, mix.
Ferric oxide, manganese oxide, zinc oxide, dispersion agent, defoamer and tackiness agent are dropped in the super mixer, and add the deionized water of 60 weight %, mixed 60 minutes, obtain the compound that viscosity is 250cps.
Afterwards, carry out drying.With spray-drier above-mentioned compound being made granularity is 80～100 microns particle; This particulate moisture and flow angle are respectively 0.1 weight % and 40 degree.
Afterwards, carry out pre-burning.
Above-mentioned granular mixture is put into rotary kiln or push-plate type tunnel furnace, and pre-burning is 1 hour under 800 ℃ temperature.
Afterwards, pulverize.Is 15～20 microns powder with pulverizer to pulverizing 10 minutes through the granular mixture of pre-burning, obtaining median size.
Afterwards, grind.The deionized water and the dispersion agent of 0.2～0.6 weight % of remainder, the tackiness agent of 0.5～1.2 weight %, the defoamer of 0.1～0.3 weight % that in above-mentioned powder, add 40 weight %, ground 40 minutes with the fine grinding machine, obtaining particle diameter is the material of 250cps less than 9 microns, viscosity.
Afterwards, carrying out after drying handles.Carry out drying treatment with spray-drier, obtain particle diameter and be 80～200 microns, flow angle particles less than 30 degree.Then, carry out humidification, obtain the particle that water content is 0.5 weight % with humidifier.
Afterwards, carry out forming processes.Carry out moulding with automatic molder, obtain having the blank of definite shape.
Again, carry out sintering.With the push-plate type continuous tunnel furnace in the atmosphere of nitrogen or vacuum control oxygen partial pressure, according to carrying out sintering under following different time sections and the differing temps value: earlier in 1 hour, rise to 600 ℃, in 2 hours, rise to 1150 ℃ and under this temperature, kept 1 hour again by 600 ℃ by room temperature; Afterwards, be warming up to 1310 ℃ again, and under this temperature, be incubated 2.5 hours; In 3 hours, reduce to 150 ℃ then.
At last, through mill processing, cleaning, oven dry and coating, obtain high frequency low-loss manganese zine ferrite of the present invention.
Second embodiment
Earlier take by weighing raw material according to following proportioning:
54.2 moles of % of ferric oxide, 43.8 moles of % of manganese oxide, 3.0 moles of % of zinc oxide, dispersion agent 0.6 weight %, tackiness agent 1.2 weight %, defoamer 0.6 weight %.Dispersion agent wherein is poly-propionic acid, and tackiness agent is a polyvinyl alcohol, and defoamer is a n-Octanol.
Then, mix.
Ferric oxide, manganese oxide, zinc oxide, dispersion agent, defoamer and tackiness agent are dropped in the super mixer, and add the deionized water of 100 weight %, mixed 75 minutes, obtain the compound that viscosity is 300cps.
Afterwards, carry out drying.With spray-drier above-mentioned compound being made granularity is 80～100 microns particle; This particulate moisture and flow angle are respectively 0.1 weight % and 40 degree.
Afterwards, carry out pre-burning.
Above-mentioned granular mixture is put into rotary kiln or push-plate type tunnel furnace, and pre-burning is 2 hours under 900 ℃ temperature.
Afterwards, pulverize.Is 15～20 microns powder with pulverizer to pulverizing 25 minutes through the granular mixture of pre-burning, obtaining median size.
Afterwards, grind.The deionized water and the dispersion agent of 0.2～0.6 weight % of remainder, the tackiness agent of 0.5～1.2 weight %, the defoamer of 0.1～0.3 weight % that in above-mentioned powder, add 70 weight %, ground 65 minutes with the fine grinding machine, obtaining particle diameter is the material of 300cps less than 9 microns, viscosity.
Afterwards, carrying out after drying handles.Carry out drying treatment with spray-drier, obtain particle diameter and be 80～200 microns, flow angle particles less than 30 degree.Then, carry out humidification, obtain the particle that water content is 0.7 weight % with humidifier.
Afterwards, carry out forming processes.Carry out moulding with automatic molder, obtain having the blank of definite shape.
Again, carry out sintering.With the push-plate type continuous tunnel furnace in the atmosphere of nitrogen or vacuum control oxygen partial pressure, according to carrying out sintering under following different time sections and the differing temps value: earlier in 4 hours, rise to 600 ℃, in 3 hours, rise to 1150 ℃ and under this temperature, kept 1 hour again by 600 ℃ by room temperature; Afterwards, be warming up to 1325 ℃ again, and under this temperature, be incubated 3.5 hours; In 8 hours, reduce to 150 ℃ then.
At last, through mill processing, cleaning, oven dry and coating, obtain high frequency low-loss manganese zine ferrite of the present invention.
The 3rd embodiment
Earlier take by weighing raw material according to following proportioning:
54.6 moles of % of ferric oxide, 43.4 moles of % of manganese oxide, 2.4 moles of % of zinc oxide, dispersion agent 1.2 weight %, tackiness agent 2.0 weight %, defoamer 0.2 weight %.Dispersion agent wherein is poly-propionic acid, and tackiness agent is a polyvinyl alcohol, and defoamer is a n-Octanol.
Then, mix.
Ferric oxide, manganese oxide, zinc oxide, dispersion agent, defoamer and tackiness agent are dropped in the super mixer, and add the deionized water of 150 weight %, mixed 90 minutes, obtain the compound that viscosity is 350cps.
Afterwards, carry out drying.With spray-drier above-mentioned compound being made granularity is 80～100 microns particle; This particulate moisture and flow angle are respectively 0.1 weight % and 40 degree.
Afterwards, carry out pre-burning.
Above-mentioned granular mixture is put into rotary kiln or push-plate type tunnel furnace, and pre-burning is 3 hours under 1000 ℃ temperature.
Afterwards, pulverize.Is 15～20 microns powder with pulverizer to pulverizing 40 minutes through the granular mixture of pre-burning, obtaining median size.
Afterwards, grind.The deionized water and the dispersion agent of 0.2～0.6 weight % of remainder, the tackiness agent of 0.5～1.2 weight %, the defoamer of 0.1～0.3 weight % that in above-mentioned powder, add 100 weight %, ground 90 minutes with the fine grinding machine, obtaining particle diameter is the material of 350cps less than 9 microns, viscosity.
Afterwards, carrying out after drying handles.Carry out drying treatment with spray-drier, obtain particle diameter and be 80～200 microns, flow angle particles less than 30 degree.Then, carry out humidification, obtain the particle that water content is 1.0 weight % with humidifier.
Afterwards, carry out forming processes.Carry out moulding with automatic molder, obtain having the blank of definite shape.
Again, carry out sintering.With the push-plate type continuous tunnel furnace in the atmosphere of nitrogen or vacuum control oxygen partial pressure, according to carrying out sintering under following different time sections and the differing temps value: earlier in 6 hours, rise to 600 ℃, in 4 hours, rise to 1150 ℃ and under this temperature, kept 4 hours again by 600 ℃ by room temperature; Afterwards, be warming up to 1325 ℃ again, and under this temperature, be incubated 4.5 hours; In 12 hours, reduce to 150 ℃ then.
At last, through mill processing, cleaning, oven dry and coating, obtain high frequency low-loss manganese zine ferrite of the present invention.
Claims (5)
1. high frequency low-loss manganese zine ferrite is characterized in that containing following raw materials according:
53.8～54.6 moles of % of ferric oxide;
43.0～43.8 moles of % of manganese oxide;
2.4～3.5 moles of % of zinc oxide;
Dispersion agent 0.6～1.2 weight %;
Tackiness agent 0.6～2.0 weight %;
Defoamer 0.2～0.6 weight %.
2. high frequency low-loss manganese zine ferrite according to claim 1 is characterized in that said dispersion agent is poly-propionic acid.
3. high frequency low-loss manganese zine ferrite according to claim 1 is characterized in that said tackiness agent is a polyvinyl alcohol.
4. high frequency low-loss manganese zine ferrite according to claim 1 is characterized in that said defoamer is a n-Octanol.
5. according to the preparation method of the described high frequency low-loss manganese zine ferrite of claim 1, it is characterized in that may further comprise the steps:
(1) mixes
Ferric oxide, manganese oxide, zinc oxide, dispersion agent, defoamer and tackiness agent are dropped in the super mixer, and add the deionized water of 60～150 weight %, mixed 60～90 minutes, obtain the compound that viscosity is 250～350cps;
(2) drying
With spray-drier above-mentioned compound being made granularity is 80～100 microns particle; This particulate moisture and flow angle are respectively 0.1 weight % and 40 degree;
(3) pre-burning
Above-mentioned granular mixture is put into rotary kiln or push-plate type tunnel furnace, and pre-burning is 0.5～3 hour under 800～1000 ℃ temperature;
(4) pulverize
Is 15～20 microns powder with pulverizer to pulverizing 10～40 minutes through the granular mixture of pre-burning, obtaining median size;
(5) grind
The deionized water and the dispersion agent of 0.2～0.6 weight % of remainder, the tackiness agent of 0.5～1.2 weight %, the defoamer of 0.1～0.3 weight % that in above-mentioned powder, add 40～100 weight %, ground 40～90 minutes with the fine grinding machine, obtaining particle diameter is the material of 250～350cps less than 9 microns, viscosity;
(6) after drying
Carry out drying treatment with spray-drier, obtain particle diameter and be 80～200 microns, flow angle particles less than 30 degree; Then, carry out humidification, obtain the particle that water content is 0.5～1.0 weight % with humidifier;
(7) moulding
Carry out moulding with automatic molder, obtain having the blank of definite shape;
(8) sintering
With the push-plate type continuous tunnel furnace in the atmosphere of nitrogen or vacuum control oxygen partial pressure, according to carrying out sintering under following different time sections and the differing temps value: earlier in 1～6 hour, rise to 600 ℃, in 2～4 hours, rise to 1150 ℃ and under this temperature, kept 1～4 hour again by 600 ℃ by room temperature; Afterwards, be warming up to 1310～1340 ℃ again, and under this temperature, be incubated 2.5～4.5 hours; In 3～12 hours, reduce to 150 ℃ then; At last, through mill processing, cleaning, oven dry and coating, obtain high frequency low-loss manganese zine ferrite of the present invention.
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| CN 200510039261 CN1861544A (en) | 2005-05-11 | 2005-05-11 | High frequency low-loss manganese zine ferrite and preparation process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345673A (en) * | 2021-04-28 | 2021-09-03 | 北京计算科学研究中心 | High-frequency ultra-thin type switching power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345673A (en) * | 2021-04-28 | 2021-09-03 | 北京计算科学研究中心 | High-frequency ultra-thin type switching power supply |
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