JPH09188576A - Production of porous ferrite material - Google Patents
Production of porous ferrite materialInfo
- Publication number
- JPH09188576A JPH09188576A JP1818796A JP1818796A JPH09188576A JP H09188576 A JPH09188576 A JP H09188576A JP 1818796 A JP1818796 A JP 1818796A JP 1818796 A JP1818796 A JP 1818796A JP H09188576 A JPH09188576 A JP H09188576A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite
- porous
- sintering
- metal powder
- ferrite metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Compounds Of Iron (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば磁気フィルタの
材料として用いられる多孔質フェライト材の製造方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a porous ferrite material used as a material for a magnetic filter, for example.
【０００２】[0002]
【従来の技術】従来、例えば、水処理用や各種液体の改
質等に用いられる磁気フィルタは、フィルタ素子として
永久磁石や電磁フィルタが用いられている。2. Description of the Related Art Conventionally, for example, permanent magnets and electromagnetic filters have been used as filter elements in magnetic filters used for water treatment and reforming of various liquids.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の磁気フィルタのフィルタ素子として永久磁石が用い
られたときは、非処理液体（気体も含む）との接触面積
が小さいので、フィルタ素子の充填材を多く必要とし、
また、電磁フィルタの場合は、励磁電流が大きくなって
消費電力がかさむ欠点があった。However, when a permanent magnet is used as the filter element of the above-mentioned conventional magnetic filter, the contact area with the untreated liquid (including gas) is small, so that the filler for the filter element is small. A lot of
Further, in the case of the electromagnetic filter, there is a drawback that the exciting current becomes large and the power consumption increases.
【０００４】そこで、本発明は、上記欠点を解決するた
めになされたものであって、その目的は非処理液体との
接触面積を多く取れる磁気フィルタのフィルタ素子を容
易に得ることのできる多孔質フェライト材の製造方法を
提供することにある。Therefore, the present invention has been made in order to solve the above-mentioned drawbacks, and its purpose is to make it easy to obtain a filter element of a magnetic filter which can take a large contact area with an untreated liquid. It is to provide a method for manufacturing a ferrite material.
【０００５】[0005]
【課題を解決するための手段】本発明に係る多孔質フェ
ライト材の製造方法は、上記目的を達成するために、フ
ェライト金属粉末を酸化雰囲気中で焼結処理して多孔質
フェライト材を製造することを特徴としている。また、
前記フェライト金属粉末は、そのフェライト金属粉末の
焼結温度以下の温度で焼失する多孔材に担持されるとと
もに、その多孔材は、焼結処理に先立ち無酸素雰囲気中
で焼失されるものであることを特徴としている。In order to achieve the above object, a method for producing a porous ferrite material according to the present invention produces a porous ferrite material by sintering ferrite metal powder in an oxidizing atmosphere. It is characterized by that. Also,
The ferrite metal powder is supported on a porous material that is burned at a temperature equal to or lower than the sintering temperature of the ferrite metal powder, and the porous material is burned in an oxygen-free atmosphere prior to the sintering treatment. Is characterized by.
【０００６】[0006]
【発明の実施の形態】本発明に係るフェライト金属粉末
は、磁性材料として一般に使用されるフェライト金属、
例えばバリウムフェライト金属の粉末が用いられる。そ
して、その粉末の粒径は、０．１〜１０μｍの範囲から
適宜選択される。BEST MODE FOR CARRYING OUT THE INVENTION The ferrite metal powder according to the present invention is a ferrite metal generally used as a magnetic material,
For example, powder of barium ferrite metal is used. The particle size of the powder is appropriately selected from the range of 0.1 to 10 μm.
【０００７】焼結処理は、電気炉からなる周知の焼結炉
を用いることができる。なお、この焼結炉は、大気に開
放して、又は酸素を供給して炉内を酸化雰囲気（有酸素
雰囲気）に保つことができるだけでなく、Ｎ2 ガス等の
不活性ガスの供給、又は真空処理により、炉内を無酸素
雰囲気に保つことができるようにすることが望まれる。For the sintering process, a well-known sintering furnace composed of an electric furnace can be used. It should be noted that this sintering furnace is not only capable of being opened to the atmosphere or by supplying oxygen to maintain the inside of the furnace in an oxidizing atmosphere (oxygenated atmosphere), but also by supplying an inert gas such as N 2 gas, or It is desired that the inside of the furnace can be kept in an oxygen-free atmosphere by vacuum processing.
【０００８】上述のフェライト金属粉末を担持でき、し
かもそのフェライト金属粉末の焼結温度以下で焼失する
担持体としては、例えば、周知のポリウレタンフォーム
を用いることができる。As a carrier capable of supporting the above-mentioned ferrite metal powder and burning down at a sintering temperature of the ferrite metal powder or lower, for example, a well-known polyurethane foam can be used.
【０００９】[0009]
【実施例】以下、本発明の一実施例を図１の工程図を基
に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the process chart of FIG.
【００１０】（ａ）水溶液製造工程（図１（ａ）参照） 容器１に水を入れ、その中に粉末状のアルギン酸アンモ
ニウムを１％（ｗｔ）となるように入れて撹拌機２で混
合する。これにより粘性を有するアルギン酸アンモニウ
ム水溶液Ａが得られる。なお、このアルギン酸アンモニ
ウムの代わりにアルギン酸ナトリウムを用いることもで
きる。(A) Aqueous solution manufacturing process (see FIG. 1 (a)) Water is put in a container 1, and powdery ammonium alginate is put therein to be 1% (wt) and mixed by a stirrer 2. . As a result, a viscous ammonium alginate aqueous solution A is obtained. In addition, sodium alginate can be used in place of this ammonium alginate.
【００１１】（ｂ）スラリー製造工程（図１（ｂ）参
照） アルギン酸アンモニウム水溶液を容器３に移し、アルギ
ン酸アンモニウム水溶液１に対して、平均粒径３μｍの
バリウムフェライト金属粉末を１の割合で添加し、撹拌
機４で混合撹拌してスラリーＢが製造される。(B) Slurry manufacturing process (see FIG. 1 (b)) The ammonium alginate aqueous solution was transferred to a container 3, and to the ammonium alginate aqueous solution 1, barium ferrite metal powder having an average particle size of 3 μm was added at a ratio of 1. The slurry B is manufactured by mixing and stirring with the stirrer 4.
【００１２】（ｃ）スラリー吸着工程（図１（ｃ）参
照） スラリーＢを底の浅い容器５に移し、この容器５内に担
持体としてのシート状のポリウレタンフォーム（スポン
ジ）の多孔材６を入れ、その多孔材６に前記スラリーＢ
を含浸させる。(C) Slurry adsorption step (see FIG. 1 (c)) The slurry B is transferred to a container 5 having a shallow bottom, and a sheet-shaped polyurethane foam (sponge) porous material 6 as a carrier is placed in the container 5. Put the slurry B into the porous material 6
Impregnated.
【００１３】（ｄ）圧搾工程（図１（ｄ）参照） スラリーの含浸した多孔材６ａを一対の回転する絞りロ
ーラ７ａ，７ｂで圧搾処理して、多孔材６ａから余分な
スラリーＢが除去される。(D) Compressing step (see FIG. 1 (d)) The slurry-impregnated porous material 6a is compressed by a pair of rotating squeezing rollers 7a and 7b to remove excess slurry B from the porous material 6a. It
【００１４】（ｅ）乾燥工程（図１（ｅ）参照） 圧搾されて余分なスラリーＢの除去された多孔材６ａ
を、天日又は乾燥機で乾燥処理して水分が除去されて、
乾燥された多孔材６ｂが製造される。なお、この乾燥工
程は、次の焼結工程の焼結炉内で前処理として行うよう
にしてもよい。(E) Drying step (see FIG. 1 (e)) Porous material 6a from which excess slurry B has been removed by compression
Is dried in the sun or a dryer to remove water,
The dried porous material 6b is manufactured. Note that this drying step may be performed as a pretreatment in the sintering furnace of the next sintering step.
【００１５】（ｆ）焼結工程（図１（ｆ）参照） （１）第１段階 乾燥された多孔材６ｂは、焼結炉８に
入れられ、バルブＶ1を閉，バルブＶ2 を開にし、バル
ブＶ2 の設けられているラインから焼結炉８内の気体を
吸引除去する真空処理をして、焼結炉８内を無酸素雰囲
気に保って約３００℃に加熱処理される。これにより、
ポリウレタンフォームは焼失する。なお、有酸素状態で
約３００℃に加熱してポリウレタンフォームを焼失させ
た場合、ポリウレタンフォームが炭化し、良質の多孔質
フェライト材を得ることができない。(F) Sintering step (see FIG. 1 (f)) (1) First stage The dried porous material 6b is put into a sintering furnace 8 and the valve V1 is closed and the valve V2 is opened. A vacuum treatment for sucking and removing the gas in the sintering furnace 8 from the line provided with the valve V2 is performed, and the sintering furnace 8 is heat-treated at about 300 ° C. while maintaining an oxygen-free atmosphere. This allows
Polyurethane foam burns out. When the polyurethane foam is burned down by heating it to about 300 ° C. in an aerobic state, the polyurethane foam is carbonized and a good quality porous ferrite material cannot be obtained.
【００１６】（２） 第２段階 バルブＶ1 ，Ｖ2 をあ
け、バルブＶ1 の設けられているラインから空気を供給
して焼結炉８内を有酸素雰囲気に保って約１０００℃で
約１２０分間焼結処理される。(2) Second stage The valves V1 and V2 are opened, air is supplied from the line where the valve V1 is provided, and the sintering furnace 8 is maintained in an oxygen atmosphere and baked at about 1000 ° C. for about 120 minutes. Is processed.
【００１７】（ｇ）製品取出工程（図１（ｇ）参照） 焼結炉８から多孔材６ｂの焼失したフェライト金属の焼
結して得られた多孔質フェライト材９が取出される。こ
の多孔質フェライト材９は、図１（ｇ）のＣに拡大して
示されるように、三次元網目構造の多孔質に形成されて
いる。しかも、この多孔質フェライト材９は、酸化雰囲
気中で焼結されているので、永久磁石材として優れたも
のとすることができる。(G) Product removal step (see FIG. 1 (g)) The porous ferrite material 9 obtained by sintering the burned ferrite metal of the porous material 6b is removed from the sintering furnace 8. The porous ferrite material 9 is formed in a porous three-dimensional network structure as shown in an enlarged view of C in FIG. Moreover, since this porous ferrite material 9 is sintered in an oxidizing atmosphere, it can be made excellent as a permanent magnet material.
【００１８】（ｈ）磁化工程（図１（ｈ）参照） 多孔質フェライト材９は、励磁コイル１０により磁化さ
れ、これにより、磁気フィルタのフィルタ素子が完成す
る。励磁コイル１０による磁化力が８０００エルステッ
ド以上で、残留磁気７０ガウスのフィルタ素子が得られ
た。なお、無酸素雰囲気で焼結処理した多孔質フェライ
ト材のときは、磁化力が８０００エルステッド以上でも
１０ガウス以上の残留磁気にならなかった。(H) Magnetizing Step (see FIG. 1 (h)) The porous ferrite material 9 is magnetized by the exciting coil 10, and the filter element of the magnetic filter is completed. A magnetizing force by the exciting coil 10 was 8000 Oersted or more, and a filter element having a remanence of 70 Gauss was obtained. In the case of the porous ferrite material sintered in the oxygen-free atmosphere, the residual magnetism of 10 Gauss or more was not obtained even when the magnetizing force was 8000 oersted or more.
【００１９】本実施例方法で製造された多孔質フィルタ
は、水処理用あるいは各種液体の改質用等として広く使
用することができる。The porous filter produced by the method of this embodiment can be widely used for water treatment or modification of various liquids.
【００２０】[0020]
【発明の効果】本発明に係る多孔質フェライト材の製造
方法は、フェライト金属粉末を酸化雰囲気中で焼結処理
して多孔質フェライト材を製造するようにしたので、残
留磁気が大きく、しかも表面積が大きい永久磁石材が得
られる。したがって、磁気フィルタのフィルタ素子とし
て好適である。また、フェライト金属粉末は、そのフェ
ライト金属粉末の焼結温度以下の温度で焼失する多孔材
に担持されるとともに、その多孔材は、焼結処理に先立
ち無酸素雰囲気中で焼失されるものとしたときは、担持
体が残存しないので、良質なフィルタ素子を得ることが
できる。In the method for producing a porous ferrite material according to the present invention, since the ferrite metal powder is sintered in an oxidizing atmosphere to produce a porous ferrite material, the residual magnetism is large and the surface area is large. A permanent magnet material having a large value can be obtained. Therefore, it is suitable as a filter element of a magnetic filter. Further, the ferrite metal powder is carried on a porous material which is burned at a temperature equal to or lower than the sintering temperature of the ferrite metal powder, and the porous material is burned in an oxygen-free atmosphere prior to the sintering treatment. At this time, since the carrier does not remain, a good quality filter element can be obtained.
【図１】本発明の一実施例方法の製造工程図である。FIG. 1 is a manufacturing process diagram of an embodiment method of the present invention.
１，３，５ 容器 ２，４ 撹拌機 ６，６ａ，６ｂ 多孔材 ８ 焼結炉 ９ 多孔質フェライト材 １０ 励磁コイル 1, 3, 5 Container 2, 4 Stirrer 6, 6a, 6b Porous Material 8 Sintering Furnace 9 Porous Ferrite Material 10 Excitation Coil
Claims (2)
結処理して多孔質フェライト材を製造することを特徴と
する多孔質フェライト材の製造方法。1. A method for producing a porous ferrite material, which comprises subjecting a ferrite metal powder to a sintering treatment in an oxidizing atmosphere to produce a porous ferrite material.
金属粉末の焼結温度以下の温度で焼失する多孔材に担持
されるとともに、その多孔材は、焼結処理に先立ち無酸
素雰囲気中で焼失されるものであることを特徴とする請
求項１記載の多孔質フェライト材の製造方法。2. The ferrite metal powder is carried on a porous material which is burned down at a temperature equal to or lower than the sintering temperature of the ferrite metal powder, and the porous material is burned down in an oxygen-free atmosphere prior to the sintering treatment. The method for producing a porous ferrite material according to claim 1, wherein the porous ferrite material is a material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1818796A JPH09188576A (en) | 1996-01-08 | 1996-01-08 | Production of porous ferrite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1818796A JPH09188576A (en) | 1996-01-08 | 1996-01-08 | Production of porous ferrite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09188576A true JPH09188576A (en) | 1997-07-22 |
Family
ID=11964622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1818796A Withdrawn JPH09188576A (en) | 1996-01-08 | 1996-01-08 | Production of porous ferrite material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09188576A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006005253A1 (en) * | 2004-07-09 | 2006-01-19 | Beijing University Of Chemical Technology | A porous magnetic ferrite and its preparation |
| CN100366340C (en) * | 2005-10-14 | 2008-02-06 | 济南大学 | Catalyst for degrading water organic pollutant by microwave |
| WO2010038958A3 (en) * | 2008-10-01 | 2010-07-15 | 주식회사 이엠따블유 | Method for manufacturing electronic rf components through sintering |
| CN105565388A (en) * | 2014-11-05 | 2016-05-11 | 天津大学 | Ordered three-dimensional macroporous lanthanum ferrite gas-sensitive material and preparation method thereof |
-
1996
- 1996-01-08 JP JP1818796A patent/JPH09188576A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006005253A1 (en) * | 2004-07-09 | 2006-01-19 | Beijing University Of Chemical Technology | A porous magnetic ferrite and its preparation |
| CN100366340C (en) * | 2005-10-14 | 2008-02-06 | 济南大学 | Catalyst for degrading water organic pollutant by microwave |
| WO2010038958A3 (en) * | 2008-10-01 | 2010-07-15 | 주식회사 이엠따블유 | Method for manufacturing electronic rf components through sintering |
| CN102160130A (en) * | 2008-10-01 | 2011-08-17 | 株式会社Emw | Method for manufacturing electronic RF components through sintering |
| CN105565388A (en) * | 2014-11-05 | 2016-05-11 | 天津大学 | Ordered three-dimensional macroporous lanthanum ferrite gas-sensitive material and preparation method thereof |
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Legal Events
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| A761 | Written withdrawal of application |
Effective date: 20041213 Free format text: JAPANESE INTERMEDIATE CODE: A761 |