JPS63170219A - Production of ferrite powder - Google Patents
Production of ferrite powderInfo
- Publication number
- JPS63170219A JPS63170219A JP177387A JP177387A JPS63170219A JP S63170219 A JPS63170219 A JP S63170219A JP 177387 A JP177387 A JP 177387A JP 177387 A JP177387 A JP 177387A JP S63170219 A JPS63170219 A JP S63170219A
- Authority
- JP
- Japan
- Prior art keywords
- flux
- compd
- iron
- ferrite powder
- powder
- 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.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims abstract description 36
- 229910000859 α-Fe Inorganic materials 0.000 title claims description 31
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 230000004907 flux Effects 0.000 claims abstract description 20
- 229910052788 barium Inorganic materials 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 9
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 claims abstract 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract 2
- 229910052738 indium Inorganic materials 0.000 claims abstract 2
- 229910052715 tantalum Inorganic materials 0.000 claims abstract 2
- 238000010304 firing Methods 0.000 claims description 6
- 239000007858 starting material Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 150000002506 iron compounds Chemical class 0.000 claims description 4
- 150000003438 strontium compounds Chemical class 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 18
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 5
- 239000011780 sodium chloride Substances 0.000 abstract description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 abstract description 3
- CZNCTWNLEIFMDX-UHFFFAOYSA-N [Fe].O=O Chemical compound [Fe].O=O CZNCTWNLEIFMDX-UHFFFAOYSA-N 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 abstract description 2
- 229910052758 niobium Inorganic materials 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract 2
- 238000000576 coating method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- FLTRNWIFKITPIO-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe] FLTRNWIFKITPIO-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical group [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- 229910001631 strontium chloride Inorganic materials 0.000 description 1
- AHBGXTDRMVNFER-UHFFFAOYSA-L strontium dichloride Chemical compound [Cl-].[Cl-].[Sr+2] AHBGXTDRMVNFER-UHFFFAOYSA-L 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は六角板状マグネトプランバイト型ＢａまたはＳ
「フェライト粉末を経済的、実用的に製造する方法に関
するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to a hexagonal plate-like magnetoplumbite type Ba or S
``It concerns an economical and practical method for producing ferrite powder.
従来からＢａまたはＳｒフェライト粉末は異方性フェラ
イト磁石用材料として、焼結磁石およびゴム、プラステ
ィック磁石に用いられており、最近では磁気カード、磁
気交通切符等にも使用されている。Ba or Sr ferrite powder has conventionally been used as an anisotropic ferrite magnet material for sintered magnets, rubber, and plastic magnets, and recently has also been used for magnetic cards, magnetic traffic tickets, and the like.
（従来の技術およびその問題点）
現在、一般に工業的規模において量産化され、多量に使
用されている異方性フエライ１〜磁石用材料粉末は、原
料粉末を１１００℃以上の温度で焼結し、それを粉砕す
るものである。したがって形状は不定形で六角板状を呈
していない、しかも結晶中に歪みを有するＢａまたはＳ
「フェライト粉末である。このため、これらのフェライ
ト粉末を用いて例えば優れた性能を有する異方性フェラ
イト磁石を作ることには限界があった。(Prior art and its problems) Currently, anisotropic ferrite 1 to magnet material powder, which is generally mass-produced on an industrial scale and used in large quantities, is produced by sintering raw material powder at a temperature of 1100°C or higher. , is what crushes it. Therefore, the shape is irregular and does not have a hexagonal plate shape, and moreover, Ba or S which has distortion in the crystal.
"These are ferrite powders. Therefore, there were limits to the use of these ferrite powders to create, for example, anisotropic ferrite magnets with excellent performance.
この問題点を解決するために六角板状で、粒子が−個一
個バラバラであり、分散性、配向性の優れたＢａまたは
Ｓ「フェライト粉末の製造法が提案されており１例えば
特公昭５５−４９０３０号公報、特開昭５７−１２０３
０８号公報記載の方法がある。しかしながら、これらの
方法においても、得られるＢａまたはＳｒフェライト粉
末は粒度分布が広く、粒子−個一個の磁気特性が均一で
ないという問題があった。To solve this problem, a method for producing Ba or S ferrite powder, which is hexagonal plate-shaped, has individual particles, and has excellent dispersibility and orientation, has been proposed. Publication No. 49030, JP-A-57-1203
There is a method described in Publication No. 08. However, these methods also have the problem that the resulting Ba or Sr ferrite powder has a wide particle size distribution and the magnetic properties of individual particles are not uniform.
（発明の目的）
本発明の目的は、前記従来法の欠点を解決し、粒度分布
が狭く、磁気特性が均一であるＢａまたはＳ「フェライ
ト粉末の５１Ｊ’Ａ方法を提供することにある。(Objective of the Invention) An object of the present invention is to solve the drawbacks of the conventional methods and provide a 51J'A method for producing Ba or S ferrite powder, which has a narrow particle size distribution and uniform magnetic properties.
本発明の他の目的は磁気カード、磁気テープなどの塗膜
、インキ等を製造する場合の分散性、配向性に優れ、さ
らにゴム、プラスチック磁石の製造工程における樹脂へ
の分散性能および配向性能が優れたＢａまたはＳｒフェ
ライト粉末を容易かつ経済的に製造することができる方
法を提供することにある。Another object of the present invention is to provide excellent dispersibility and orientation when manufacturing coatings and inks for magnetic cards, magnetic tapes, etc., and to provide excellent dispersibility and orientation performance in resins in the manufacturing process of rubber and plastic magnets. The object of the present invention is to provide a method that can easily and economically produce excellent Ba or Sr ferrite powder.
（間通点を解決するための技術的手段）本発明は、マグ
ネトプランバイトをＢａまたはＳ「フェライト粉末を製
造するに当り、鉄化合物とバリウムまたはストロンチウ
ム化合物とからなる出発原料および出発原料に対して１
〜１００重量％の融剤を混合し、混合物を融剤の雰囲気
中で８００℃以上の温度で加熱焼成し、次いで焼成粉末
を洗浄して融剤を除去することを特徴とするフェライト
粉末の製法に関するものである。(Technical means for solving the problem) The present invention uses magnetoplumbite as a Ba or S ferrite powder. te1
A method for producing ferrite powder, which comprises mixing ~100% by weight of a flux, heating and firing the mixture at a temperature of 800°C or higher in an atmosphere of the flux, and then washing the fired powder to remove the flux. It is related to.
本発明においては、まず出発原料の鉄化合物とバリウム
またはストロンチウム化合物に融剤を混合する。In the present invention, first, a flux is mixed with the starting materials, an iron compound and a barium or strontium compound.
鉄化合物としては水酸化鉄、オキシ酸化鉄、酸化鉄等が
用いられる。As the iron compound, iron hydroxide, iron oxyoxide, iron oxide, etc. are used.
バリウムまたはストロンチウムの化合物としては、それ
らの酸化物、さらにそれらの水酸化物、炭酸塩などの分
解により酸化物に転化しうる化合物が用いられる。As the compound of barium or strontium, compounds that can be converted into oxides by decomposition of their oxides, hydroxides, carbonates, etc. are used.
鉄化合物とバリウムまたはストロンチウム化合物の割合
は、原子比でＦｅ７’Ｍ（ＭはＢａまたはＳｒ）が１０
／１〜１４／１の範囲であることが好ましい、この範囲
を４まずれるとマグネトプランバイト型の結晶が生成し
難くなる。The ratio of iron compounds to barium or strontium compounds is as follows: Fe7'M (M is Ba or Sr) is 10% in atomic ratio.
The range is preferably from /1 to 14/1.If the ratio is outside this range by 4/1, magnetoplumbite type crystals become difficult to form.
−ｆｉに、マグネトプランバイト型のＢａまたはＳ「フ
ェライト粉末の保磁力は、２０００〜４００００ｅであ
り、異方性フェライト磁石材料には適しているが、磁気
カード用には保磁力が５００〜３ＱＯＯＯｅであること
が好ましい、この範囲に保磁力をコントロールするため
に、ｒｎ、ｃｒ、ｚｎ十Ｖ、Ｚｌｌ ＋Ｎｂ、Ｚｎ 十
Ｔａ、ＣＯ＋Ｔｉ、Ｃｏ 十Ｖ。-fi is magnetoplumbite type Ba or S "The coercive force of ferrite powder is 2000 to 40000e, which is suitable for anisotropic ferrite magnet material, but the coercive force is 500 to 3QOOOe for magnetic cards. In order to control the coercive force within this range, preferably rn, cr, zn 10 V, Zll + Nb, Zn 10 Ta, CO + Ti, Co 10 V.
ｃｏ ＋Ｚｎ、Ｎｉ ＋ｚｎ、ｃｕ 十ｚｒの一種以上
の元素または元素の組合わせを、鉄１グラム原子は対し
０．２グラム原子以下の量でそれぞれの元素の化合物と
して添加することもできる。それぞれの元素の化合物と
しては、酸化物、塩化物、炭酸塩、硝酸塩などが用いら
れる。One or more elements or a combination of elements such as co + Zn, Ni + zn, and cu + zr can be added as a compound of each element in an amount of 0.2 gram atom or less per gram atom of iron. As compounds of each element, oxides, chlorides, carbonates, nitrates, etc. are used.
融剤としては、８００℃以上の温度で融解し、分解しな
いもので、水に容易に溶解するものであれば、特に制限
はない０例えば、塩化ナトリウム、塩化カリウム、塩化
バリウム、塩化ストロンチウム等の単独または混合系が
一般に使用される０価格の面から安価な塩化ナトリウム
が望ましい。There are no particular restrictions on the flux as long as it melts at a temperature of 800°C or higher, does not decompose, and easily dissolves in water.For example, sodium chloride, potassium chloride, barium chloride, strontium chloride, etc. Sodium chloride is desirable because it is inexpensive and is generally used alone or in a mixed system.
融剤の使用社は、出発原料に対して１〜１００重量％で
ある。その量が少なずぎると目的とする粒子形態のもの
が得られない、また多すぎても多くしたことによる利点
はなく、経済的でない。The amount of flux used is 1 to 100% by weight based on the starting material. If the amount is too small, it will not be possible to obtain the desired particle shape, and if the amount is too large, there will be no advantage to increasing the amount and it will be uneconomical.
出発原料と融剤の混合はボールミル、ニーダ−等を用い
た通常の混合方法で十分である。A conventional mixing method using a ball mill, kneader, etc. is sufficient for mixing the starting materials and the flux.
得られた混合物は、粉末のままで焼成を行う。The obtained mixture is fired in powder form.
焼成は８００℃以上の温度で、かつ融剤の融点以上で行
う、８００℃より低い温度では結晶化が不十分となる。The calcination is carried out at a temperature of 800° C. or higher and above the melting point of the flux; if the temperature is lower than 800° C., crystallization will be insufficient.
本発明においては、焼成は融剤の雰囲気下で行うことが
必要である。融剤の雰囲気がない場合には、焼成物の表
面部分において融剤の昇華が起り、それによって融剤な
しで熱処理が進行するために、焼結が起りやすくなり、
したがって磁気特性が不均一になり、また形状的にも粒
度分布の広いものとなる。In the present invention, it is necessary to perform the firing in an atmosphere of a flux. If there is no flux atmosphere, the flux will sublimate on the surface of the fired product, and the heat treatment will proceed without the flux, making sintering more likely.
Therefore, the magnetic properties become nonuniform, and the particle size distribution becomes wide in terms of shape.
ｔ２＞られな焼成物は水に分散させ、融剤を水洗除去し
た後、濾過、乾燥することにより、粒度分布が狭く、磁
気特性が均一なりａまたはＳｒフェライト粉末となる。The fired product with t2> is dispersed in water, the flux is removed by washing with water, and then filtered and dried to obtain a or Sr ferrite powder with a narrow particle size distribution and uniform magnetic properties.
（実施例） 次に実施例ならびに比較例により、本発明を説明する。(Example) Next, the present invention will be explained with reference to Examples and Comparative Examples.
尚、実施例ならびに比較例の粒子形状および平均粒子径
、厚みは走査型電子顕微鏡により観察、測定した。The particle shapes, average particle diameters, and thicknesses of Examples and Comparative Examples were observed and measured using a scanning electron microscope.
実施例１
水酸化鉄［Ｆｅ（ｏＨ）３］と炭酸バリウム（ＢａＣｏ
）をモル比でＦｅ（Ｏ）口 ：ｌ３ａＣ○３＝１１
．５：１となるように全量で１００ｇ取り、これに融剤
として塩化ナトリウム２０ｇを加え、これらをボールミ
ルを用いて混合した０次いで、密閑された焼成炉内に混
合物とさらに別の容器に入れた塩化ナトリウムとを入れ
、９００℃で２時間混合物を焼成した後、混合物のみを
水洗、乾燥してＢａフェライト粉末を得た。Example 1 Iron hydroxide [Fe(oH)3] and barium carbonate (BaCo
) in molar ratio Fe(O):l3aC○3=11
．． A total of 100g was taken so that the ratio was 5:1, 20g of sodium chloride was added as a fluxing agent, and these were mixed using a ball mill.Next, the mixture was placed in a separate container in a tightly closed firing furnace. After baking the mixture at 900° C. for 2 hours, the mixture alone was washed with water and dried to obtain Ba ferrite powder.
得られたＢａフェライト粉末は走査型電子顕微鏡観察の
結果、六角板状をしており、平均粒子径０．４２μｍで
、粒径と厚みの比は４．６であった。As a result of scanning electron microscope observation, the obtained Ba ferrite powder was found to have a hexagonal plate shape, an average particle size of 0.42 μm, and a particle size to thickness ratio of 4.6.
また、磁気特性は保磁力２５３００ｅ、飽和磁化６１．
５ｅｍｕ／ｇであった。この粉を塩化ビニル−酢酸ビニ
ル系ポリマーをバインダーとして・「ンクを調製し、塗
ｊ模を形成した。得られた塗膜の角形比は０．８３であ
り、また光沢度は３１．５％であった。The magnetic properties are coercive force 25300e and saturation magnetization 61.
It was 5 emu/g. Using this powder as a binder, a vinyl chloride-vinyl acetate polymer was used to prepare a coating and form a coating. The squareness ratio of the resulting coating was 0.83, and the gloss was 31.5%. Met.
実施例２
ＢａＣＯをＳｒＣＯ３にかえたほかは、実施例１と同様
にしてＳｒフェライト粉末を得た。Example 2 Sr ferrite powder was obtained in the same manner as in Example 1 except that BaCO was replaced with SrCO3.
得られたＳｒフェライト粉末は六角板状をしており、平
均粒子径０．４１μｍで粒径と厚みの比は５．０であっ
た。また、磁気特性は保磁力２６１０ｏｅ、飽和磁゛化
６３．５ｅｍｕ／ｇであった。塗膜の角型比は０．８２
であり、光沢度２９％であった。The obtained Sr ferrite powder had a hexagonal plate shape, an average particle size of 0.41 μm, and a particle size to thickness ratio of 5.0. The magnetic properties were a coercive force of 2610 oe and a saturation magnetization of 63.5 emu/g. The squareness ratio of the coating film is 0.82
The glossiness was 29%.
実施例３
原料としてＦｃ（ＯＨ）３、Ｔ ｉ Ｏ２、ＣＯＯおよ
び５ｒＣ０３をモル比でＦｃ（ＯＨ）３：Ｔｉ Ｏ２：
Ｃｏ Ｏ： Ｓｒ Ｃｏ３＝１０．５０ ： ０．８４
： ０．８４ 二１となるように混合したものを用い
たほがは実施例１と同様にしてＳ「フェライト粉末を得
た。Example 3 As raw materials, Fc(OH)3, TiO2, COO and 5rC03 were used in a molar ratio of Fc(OH)3:TiO2:
CoO: SrCo3=10.50: 0.84
: 0.84 ferrite powder was obtained in the same manner as in Example 1 using the mixture.
得られたＳｒフェライト粉末は六角板状をしており、平
均粒子径０．４１μｍで、粒径と厚みの比は５．２であ
った。また磁気特性は保磁力１６０００ｅ、飽和磁化６
１．１ｅｍｕ／ｇであった。塗膜の角型比は０．８０で
あり、光沢度３５．５％であった。また得られたＳｒフ
ェライト粉末の保磁力の分布を示ずＢＨトレーサーによ
るＩ−Ｈ微分曲線を第１図に示す。The obtained Sr ferrite powder had a hexagonal plate shape, an average particle size of 0.41 μm, and a particle size to thickness ratio of 5.2. Also, the magnetic properties are coercive force 16000e, saturation magnetization 6
It was 1.1 emu/g. The squareness ratio of the coating film was 0.80, and the glossiness was 35.5%. Further, FIG. 1 shows an I-H differential curve obtained by a BH tracer without showing the coercive force distribution of the obtained Sr ferrite powder.
比較例１
実施例３において、焼成を開放焼成炉内で行い、塩化ナ
トリウムの雰囲気操作をしなかったほかは、実施例３と
同様にして、Ｓｒフエラ、イト粉末を得た。Comparative Example 1 Sr ferrite powder was obtained in the same manner as in Example 3, except that the firing was performed in an open firing furnace and the sodium chloride atmosphere was not operated.
得られたＳｒフェライ１〜粉末は六角板状をしており、
平均粒子径０．５１μｍで、粒径と厚みの比は３．９で
あった。また磁気特性は保磁力２２０００ｅ、飽和磁化
５ Ｂ、 Ｓ ｅ ｔｎ ｕ 、／ ｇであった。塗膜
の角型比は０．７５であり、光沢度は２５．５％であっ
た。また得られたＳｒフェライト粉末の保磁力の分布は
第２図に示すように広いものであった。The obtained Sr ferrite 1 ~ powder has a hexagonal plate shape,
The average particle size was 0.51 μm, and the ratio of particle size to thickness was 3.9. The magnetic properties were a coercive force of 22,000e and a saturation magnetization of 5 B, S e tn u , /g. The squareness ratio of the coating film was 0.75, and the glossiness was 25.5%. Furthermore, the coercive force distribution of the obtained Sr ferrite powder was wide as shown in FIG.
第１ＵＡおよび第２図は、本発明の実施例３および比較
例１で得られたＳｒフェライト粉末の保磁力の分布を示
す図である。FIG. 1 UA and FIG. 2 are diagrams showing the coercive force distribution of the Sr ferrite powder obtained in Example 3 of the present invention and Comparative Example 1.
Claims (2)
ト粉末を製造するに当り、鉄化合物とバリウムまたはス
トロンチウム化合物とからなる出発原料および出発原料
に対して１〜１００重量％の融剤を混合し、混合物を融
剤の雰囲気中で８００℃以上の温度で加熱焼成し、次い
で焼成粉末を洗浄して融剤を除去することを特徴とする
フェライト粉末の製法。(1) In producing magnetoplumbite type Ba or Sr ferrite powder, a starting material consisting of an iron compound and a barium or strontium compound and a fluxing agent of 1 to 100% by weight are mixed with the starting material, and the mixture is A method for producing ferrite powder, which comprises heating and firing at a temperature of 800° C. or higher in a flux atmosphere, and then washing the fired powder to remove the flux.
Ｚｎ＋Ｔａ、Ｃｏ＋Ｔｉ、Ｃｏ＋Ｖ、Ｃｏ＋Ｚｎ、Ｎｉ
＋Ｚｎ、Ｃｕ＋Ｚｒの一種以上の元素または元素の組合
わせを、鉄１グラム原子に対し０．２グラム原子以下の
量でそれぞれの元素の化合物として添加する特許請求の
範囲第１項記載のフェライト粉末の製法。(2) Starting materials include In, Cr, Zn+V, Zn+Nb,
Zn+Ta, Co+Ti, Co+V, Co+Zn, Ni
The ferrite powder according to claim 1, wherein one or more elements or combinations of elements +Zn, Cu+Zr are added as a compound of each element in an amount of 0.2 gram atom or less per 1 gram atom of iron. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP177387A JPS63170219A (en) | 1987-01-09 | 1987-01-09 | Production of ferrite powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP177387A JPS63170219A (en) | 1987-01-09 | 1987-01-09 | Production of ferrite powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63170219A true JPS63170219A (en) | 1988-07-14 |
Family
ID=11510893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP177387A Pending JPS63170219A (en) | 1987-01-09 | 1987-01-09 | Production of ferrite powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63170219A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010117070A1 (en) * | 2009-04-09 | 2010-10-14 | Ｄｏｗａエレクトロニクス株式会社 | Ferrite powder for bonded magnet, method for producing same and bonded magnet using same |
| JP2014078757A (en) * | 2009-04-09 | 2014-05-01 | Dowa Electronics Materials Co Ltd | Ferrite powder for bond magnet and bond magnet employing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5673698A (en) * | 1979-11-21 | 1981-06-18 | Toda Kogyo Corp | Manufacture of magnetoplumbite type composite ferrite particle powder assuming hexagonal plate form |
-
1987
- 1987-01-09 JP JP177387A patent/JPS63170219A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5673698A (en) * | 1979-11-21 | 1981-06-18 | Toda Kogyo Corp | Manufacture of magnetoplumbite type composite ferrite particle powder assuming hexagonal plate form |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010117070A1 (en) * | 2009-04-09 | 2010-10-14 | Ｄｏｗａエレクトロニクス株式会社 | Ferrite powder for bonded magnet, method for producing same and bonded magnet using same |
| JP2010263201A (en) * | 2009-04-09 | 2010-11-18 | Dowa Electronics Materials Co Ltd | Ferrite powder for bonded magnet, method of manufacturing the same, and bonded magnet using the same |
| CN102388423A (en) * | 2009-04-09 | 2012-03-21 | 同和电子科技有限公司 | Ferrite powder for bonded magnet, method for producing same and bonded magnet using same |
| JP2014078757A (en) * | 2009-04-09 | 2014-05-01 | Dowa Electronics Materials Co Ltd | Ferrite powder for bond magnet and bond magnet employing the same |
| US8951635B2 (en) | 2009-04-09 | 2015-02-10 | Dowa Electronics Materials Co., Ltd. | Ferrite powder for bonded magnet, method for manufacturing ferrite powder, and bonded magnet using ferrite powder |
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