CN103951408A - Preparation method of manganese zinc ferrite magnetic core material for LED driving power - Google Patents
Preparation method of manganese zinc ferrite magnetic core material for LED driving power Download PDFInfo
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- CN103951408A CN103951408A CN201410164126.2A CN201410164126A CN103951408A CN 103951408 A CN103951408 A CN 103951408A CN 201410164126 A CN201410164126 A CN 201410164126A CN 103951408 A CN103951408 A CN 103951408A
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- driving power
- led driving
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Abstract
The invention discloses a preparation method of manganese zinc ferrite magnetic core material for an LED driving power supply. The manganese zinc ferrite magnetic core material for the LED driving power supply comprises the following main raw materials in mole by weight: 48.5-52.50mol% of Fe2O3, 34.50-36.20 mol% of MnO and 11.3-17mol% of ZnO. The manganese zinc ferrite magnetic core material for the LED driving power supply comprises the following trace metal additives in percentage by weight based on the main raw materials: 0.021-0.038wt% of Nb2O5, 0.025-0.041wt% of SnO2 and 0.010-0.032wt% of TiO. The preparation method comprises the following steps from the raw materials to the finished product: burdening; dry-mixing; vibrating and grinding; pre-sintering; coarsely grinding; finely grinding; spraying and granulating; inspecting; and packaging. The corresponding magnetic core prepared from the manganese zinc ferrite material for the LED driving power supply has the effects of low temperature rise, low power consumption and energy saving and consumption reduction.
Description
Technical field
The present invention relates to a kind of preparation method of MnZn ferrite material, relate in particular to a kind of preparation method of the MnZn ferrite material for LED driving power module, belong to oxidate magnetic material technical field.
Background technology
In recent years, along with vigorously advocating of low-carbon (LC), energy-conservation concept, LED illumination surges forward especially, LED need to use driving power, conventionally, in inductive energy storage boost-up circuit and switch constant-current circuit, need to use FERRITE CORE, as everyone knows, the magnetic properties of general power Mn-Zn ferrite has stronger temperature dependency, temperature difference, and loss is also different.Therefore, be installed in LED switch power supply constant-current circuit with the magnetic core that general manganese zinc ferrites for power supplies is made, can make electronic transformer temperature rise, power consumption also rises simultaneously, can cause the damage of electronic transformer when serious, does not reach energy-saving and cost-reducing object.
Summary of the invention
The present invention is directed to existing general MnZn ferrite material temperature rise and the large defect of power consumption, a kind of relative low temperature liter is provided, the MnZn ferrite material that is suitable for LED driving power of low power consumption, just, due to above-mentioned advantage, therefore the MnZn ferrite material of this LED driving power can effectively extend the work-ing life of electrical equipment.
The invention provides following technical scheme, described preparation method comprises the following steps: a kind of preparation method of the MnZn ferrite material for LED driving power, described preparation method's step comprises batching, is dry mixed, vibration, pre-burning, corase grind, fine grinding, mist projection granulating, inspection, packaging.
Described batching step, using the ferric oxide (Fe as main raw material composition
2o
3) 48.50-52.50mol%, manganese oxide (MnO) 34.50-36.20mol% and zinc oxide (ZnO) 11.3-16.9mol% carry out electronic-weighing; Trace metal additive is weighed, and its weight ratio is Nb
2o
50.021～0.038wt%, SnO
20.025～0.041wt%, TiO
20.010～0.032 wt%.
The described step that is dry mixed, described main raw material and described trace metal additive drop into ball mill and are dry mixed, and controlling simultaneously and being dry mixed the time is 1-3h, the weight ratio 1:1.5 of material and abrading-ball.
Described vibration step, i.e. vibro-grinding carries out the material after being dry mixed ball milling before pre-burning, can make like this crystallization evenly generate.
Described burn in step, by the pre-burning in 870 DEG C～920 DEG C stoves of the material powder through described ball milling step process, pre-burning rotating speed 10-15r/min.
Described corase grind step, the black mixture that above-mentioned pre-burning is obtained adopts ball mill to carry out coarse reduction.
After described fine grinding step process, the MnZn ferrite material of described LED driving power is dark particulate state powder, and granularity is 60 order-200 orders, and peak value is 140 orders.
Described mist projection granulating step, first carries out drying granulation after pulp spraying mist.
Further, described in control the oxygen level in kiln by the flow 50-100L/min that controls air in pre-burning burn in step, can make like this crystal growth, density rises.
Further, in described fine grinding step, described sand milling powder proportioning is measured, then according to measure record carry out feed supplement, make actual specific with theory than consistent.
The invention has the beneficial effects as follows: the present invention can effectively solve the problem of the heating of LED driving power magnetic core for transformer Ferrite Material and watt consumption.Guarantee electronic transformer within the scope of the step temperature of 25 DEG C-100 DEG C, power loss is low, reaches energy-conservation object.Can save approximately 75% power consumption with the LED that the improved MnZn ferrite material of the present invention is made, and have the effect of significant limitation temperature rise.
Embodiment
In conjunction with following example, can do further understanding to the present invention.
Embodiment mono-: the main raw material of the described MnZn ferrite material for LED driving power contains ferric oxide, manganese oxide and zinc oxide, the described MnZn ferrite material for LED driving power is containing trace metal additive, the proportion that its quality accounts for described main raw material is, Nb
2o
50.021wt%, SnO
20.025wt%, TiO
20.010 wt%.
Described preparation method comprises following batching, is dry mixed, vibration, pre-burning, corase grind, fine grinding, mist projection granulating, inspection, packaging step:
Batching, will carry out electronic-weighing as ferric oxide 48.5mol%, manganese oxide 34.5mol% and the zinc oxide 16.9mol% of described main raw material composition.
Be dry mixed, drop into ball mill and be dry mixed, control and be dry mixed time 1h simultaneously, and the weight ratio 1:1.5 of material and abrading-ball.
Vibro-grinding carries out the material after being dry mixed ball milling before pre-burning, can make like this crystallization even.
Pre-burning, will be taking material loading powder gained ball milling material at temperature pre-burning in 870 DEG C of stoves, pre-burning rotating speed 10r/min.
In pre-burning process, control the oxygen level in kiln by the flow 50L/min that controls air.
Corase grind, the black mixture that above-mentioned pre-burning is obtained adopts ball mill to carry out coarse reduction.
Fine grinding, powder and Nb by the coarse reduction after above-mentioned sieving containing main composition
2o
50.021wt%, SnO
20.025wt%, TiO
20.010 wt% mixes further grinding.
After described fine grinding step process, the MnZn ferrite material of described LED driving power is dark particulate state sand milling slurry.Further sand milling slip proportioning is measured, then carried out feed supplement according to measuring record, make actual specific consistent in theory ratio.
Mist projection granulating, is first slurry spraying, is secondly to dry granulation.
Embodiment bis-: the main raw material of the described MnZn ferrite material for LED driving power contains ferric oxide, manganese oxide and zinc oxide, the described MnZn ferrite material for LED driving power is containing trace metal additive, the proportion that its quality accounts for described main raw material is, Nb
2o
50.038wt%, SnO
20.041wt%, TiO
20.032 wt%.
Described preparation method comprises following batching, is dry mixed, vibration, pre-burning, corase grind, fine grinding, mist projection granulating, inspection, packaging step:
Batching, will carry out electronic-weighing as ferric oxide 52.5mol%, manganese oxide 36.2mol% and the zinc oxide 11.2mol% of described main raw material composition.
Be dry mixed, drop into ball mill and be dry mixed, control and be dry mixed time 3h simultaneously, and the weight ratio 1:1.5 of material and abrading-ball.
Vibro-grinding carries out the material after being dry mixed ball milling before pre-burning, can make like this crystallization even.
Pre-burning, will be with the pre-burning in 920 DEG C of stoves of material loading powder gained ball milling material, and pre-burning turns 15r/min, in pre-burning process, controls the oxygen level in kiln by the flow 100L/min that controls air.
Corase grind, the black mixture that above-mentioned pre-burning is obtained adopts ball mill to carry out coarse reduction.
Fine grinding, powder and Nb by the coarse reduction after above-mentioned sieving containing main composition
2o
50.038wt%, SnO
20.041wt%, TiO
20.032 wt% mixes further grinding, then sand milling slip proportioning is measured, and adjusts material rate.
Mist projection granulating.
Embodiment tri-: the main raw material of the described MnZn ferrite material for LED driving power contains ferric oxide, manganese oxide and zinc oxide, the described MnZn ferrite material for LED driving power is containing trace metal additive, the proportion that its quality accounts for described main raw material is, Nb
2o
50.030wt%, SnO
20.040wt%, TiO
20.030 wt%.
Described preparation method comprises following batching, is dry mixed, vibration, pre-burning, corase grind, fine grinding, mist projection granulating, inspection, packaging step:
Batching, will carry out electronic-weighing as ferric oxide 50mol%, manganese oxide 35mol% and the zinc oxide 14.9mol% of described main raw material composition.
Be dry mixed, drop into ball mill and be dry mixed, control and be dry mixed time 4h simultaneously, and the weight ratio 1:1.5 of material and abrading-ball.
Vibro-grinding carries out the material after being dry mixed ball milling before pre-burning, can make like this crystallization even.
Pre-burning, will be with the pre-burning in 900 DEG C of stoves of material loading powder gained ball milling material, pre-burning rotating speed 13r/min.
In pre-burning process, control the oxygen level in kiln by the flow 80L/min that controls air.
Corase grind, the black mixture that above-mentioned pre-burning is obtained adopts ball mill to carry out coarse reduction.
Fine grinding, powder and Nb by the coarse reduction after above-mentioned sieving containing main composition
2o
50.030wt%, SnO
20.041wt%, TiO
20.030 wt% mixes further grinding.
After described fine grinding step process, the MnZn ferrite material of described LED driving power is dark particulate state sand milling slurry, then carries out proportioning mensuration, after measuring, adjusts material rate, is that actual specific is consistent with theoretical ratio.
Mist projection granulating.
Inspection, the MnZn ferrite material of described LED driving power is dark particulate state powder, and granularity is 60 order-200 orders, and peak value is 140 orders.
The above-mentioned MnZn ferrite material for LED driving power is made magnet ring sample (diameter 25 × 15 × 10 ㎜), and at 100KHz, 200mT temperature is 25
0c, 80C
0, 100
0under the test condition of C, power loss is respectively 500kw/m
3, 320 kw/m
3, 300kw/ m
3, as can be seen here, along with the rising gradually of temperature, power loss reduces on the contrary.
Claims (3)
1. for the preparation method of the manganese-zinc ferrite core material of LED driving power, described preparation method comprises batching, is dry mixed, vibration, pre-burning, corase grind, fine grinding, mist projection granulating, inspection, packaging step, it is characterized in that, described batching step, to carry out electronic-weighing as ferric oxide 48.50-52.50mol%, manganese oxide 34.50-36.20mol% and the zinc oxide 11.2-16.9mol% of main raw material composition, trace metal additive is weighed, and its weight ratio is Nb
2o0.021～0.038wt%, SnO
20.025～0.041wt%, TiO
20.010～0.032 wt%;
The described step that is dry mixed, described main raw material and described trace metal additive drop into ball mill and are dry mixed, and controlling simultaneously and being dry mixed the time is 1-3h, the weight ratio 1:1.5 of material and abrading-ball;
Described burn in step, by the pre-burning in 870 DEG C～920 DEG C stoves of the material powder through described ball milling step process, pre-burning rotating speed 10-15r/min;
After described fine grinding step process, the MnZn ferrite material of described LED driving power is dark particulate state sand milling slurry, and granularity is 60 order-200 orders, and peak value is 140 orders.
2. the preparation method of the manganese-zinc ferrite core material for LED driving power according to claim 1, is characterized in that, described in control the oxygen level in kiln by the flow 50-100L/min that controls air in pre-burning burn in step.
3. the preparation method of the MnZn ferrite material for LED driving power according to claim 1, it is characterized in that, in described fine grinding step, described sand milling wet end furnish is measured, then according to measure record carry out feed supplement, make actual specific with theory than consistent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145916A (en) * | 2015-04-16 | 2016-11-23 | 安徽华林磁电科技有限公司 | Wide-temperature-ranlow-power low-power soft ferrite material novel preparation process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101996725A (en) * | 2009-08-27 | 2011-03-30 | 上海康顺磁性元件厂有限公司 | Soft magnetic mangan zinc ferrite material capable of reducing heat productivity and preparation method thereof |
| CN101996724A (en) * | 2009-08-27 | 2011-03-30 | 上海康顺磁性元件厂有限公司 | Soft magnetic manganese-zinc ferrite material and preparation method thereof |
-
2014
- 2014-04-23 CN CN201410164126.2A patent/CN103951408A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101996725A (en) * | 2009-08-27 | 2011-03-30 | 上海康顺磁性元件厂有限公司 | Soft magnetic mangan zinc ferrite material capable of reducing heat productivity and preparation method thereof |
| CN101996724A (en) * | 2009-08-27 | 2011-03-30 | 上海康顺磁性元件厂有限公司 | Soft magnetic manganese-zinc ferrite material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145916A (en) * | 2015-04-16 | 2016-11-23 | 安徽华林磁电科技有限公司 | Wide-temperature-ranlow-power low-power soft ferrite material novel preparation process |
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Application publication date: 20140730 |