JPS63156018A - Production of ferrite powder - Google Patents
Production of ferrite powderInfo
- Publication number
- JPS63156018A JPS63156018A JP5665887A JP5665887A JPS63156018A JP S63156018 A JPS63156018 A JP S63156018A JP 5665887 A JP5665887 A JP 5665887A JP 5665887 A JP5665887 A JP 5665887A JP S63156018 A JPS63156018 A JP S63156018A
- Authority
- JP
- Japan
- Prior art keywords
- particle size
- ferrite powder
- average particle
- powder
- compd
- 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 42
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000002245 particle Substances 0.000 claims abstract description 44
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 24
- 229910052788 barium Inorganic materials 0.000 claims abstract description 20
- 239000011780 sodium chloride Substances 0.000 claims abstract description 12
- 239000007858 starting material Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000004907 flux Effects 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 9
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 6
- 150000002506 iron compounds Chemical class 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 150000003438 strontium compounds Chemical class 0.000 claims description 5
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052738 indium Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052715 tantalum Inorganic materials 0.000 claims 1
- 229910052726 zirconium Inorganic materials 0.000 claims 1
- 239000013078 crystal Substances 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 abstract 1
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 9
- 230000005415 magnetization Effects 0.000 description 8
- 239000002994 raw material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910007541 Zn O Inorganic materials 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000976 ink Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 2
- 229910000018 strontium carbonate Inorganic materials 0.000 description 2
- CZNCTWNLEIFMDX-UHFFFAOYSA-N [Fe].O=O Chemical compound [Fe].O=O CZNCTWNLEIFMDX-UHFFFAOYSA-N 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
- 229910052802 copper Inorganic materials 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
- 230000007423 decrease Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 150000004679 hydroxides Chemical class 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
- 230000001788 irregular Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 150000003568 thioethers Chemical class 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
ｒ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 (Industrial Application Field) The present invention relates to a hexagonal plate-like magnetoplumbite type Ba or s
The present invention relates to an economical and practical method for producing r-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ェライト磁石用材！′：１ｒＪｉ
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
角板状と呈していない、しかも結晶中に歪みを有するＢ
ａまたはＳｒ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ｂっな。(Prior art and its problems) Currently, materials for anisotropic ferrite magnets are generally mass-produced and used in large quantities on an industrial scale! ′:1rJi
Finally, the raw material powder is sintered at a temperature of 1100°C or higher and then pulverized. Therefore, the shape of B is irregular and does not appear like a hexagonal plate, and the crystal has distortions.
a or Sr ferrite powder. For this reason, there are limits to the use of these ferrite powders to produce, 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、粒子が一個一
個バラバラであり、分散性、配向性の優れたＢａまたは
Ｓｒフェライト粉末の製造法が提案されており、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。In order to solve this problem, a method for producing Ba or Sr ferrite powder, which has a hexagonal plate shape and has individual particles and has excellent dispersibility and orientation, has been proposed, for example, in Japanese Patent Publication No. 55-49030. Publication, JP-A-57-1203
There is a method described in Publication No. 08.
特公昭５５−４９０３０号公報に記載の方法は融剤とし
て高価なりａＣＩ２またはｓ ｒ ｃ Ｊ２を用いてお
り、経済的でない、また特開昭５７−１２０３０８号公
報に記載の方法は融剤を湿式で混合するため、Ｐ通、造
粒、乾燥等の操作が必要であり、工程が煩雑で実用的で
ない。The method described in Japanese Patent Publication No. 55-49030 uses expensive aCI2 or SRC J2 as a flux, which is not economical, and the method described in Japanese Patent Publication No. 57-120308 uses a wet fluxing agent. Since the mixture is mixed in a vacuum, operations such as pouring, granulation, and drying are required, making the process complicated and impractical.
（発明の目的）
本発明の目的は前記従来法の欠点を解決し、六角板状で
、粒子が一個一個バラバラであり、さらに粒径と厚みの
比が５以上であるＢａまたはＳｒフェライト粉末の製造
方法を提供することにある。(Object of the Invention) The object of the present invention is to solve the drawbacks of the conventional method, and to use Ba or Sr ferrite powder which is hexagonal plate-shaped, each particle is disjoint, and the ratio of particle size to thickness is 5 or more. The purpose is to provide a manufacturing method.
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.
（問題点を解決するための技術的手段）本発明は、マグ
ネトプランバイト型Ｂａまたはｓｒフェライト粉末を製
造するに当り、平均粒子径５μｍ以下の鉄化合物と平均
粒子径５μｍ以下の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融剤として出発原料に対し
て１〜１００重量％の塩化ナトリウムと混合し、混合物
を８００℃以上の温度で加熱焼成し、次いで焼成粉末を
洗浄して塩化ナトリウム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 Problems) The present invention provides an iron compound with an average particle size of 5 μm or less and a barium or strontium compound with an average particle size of 5 μm or less in producing magnetoplumbite type Ba or sr ferrite powder. A starting material consisting of and 1 to 100% by weight of sodium chloride based on the starting material as a flux is mixed, the mixture is heated and calcined at a temperature of 800°C or higher, and the calcined powder is then washed to remove sodium chloride. The present invention relates to a method for producing ferrite powder characterized by the following.
本発明においてＬま、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 fluxing agent 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。鉄化合物の平均粒子径は５μｍ以下、好ま
しくは１μｍ以下である。平均粒子径が５μｍより大き
いと、生成するＢａまたはｓｒフェライトの粒子が大き
くなり、粒径と厚みの比が小さくなるとともに保磁力も
低下する。As the iron compound, iron hydroxide, iron oxyoxide, iron oxide, etc. are used. The average particle diameter of the iron compound is 5 μm or less, preferably 1 μm or less. When the average particle diameter is larger than 5 μm, the Ba or sr ferrite particles produced become large, the ratio of particle diameter to thickness becomes small, and the coercive force also decreases.
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。バリ
ウムまたはストロンチウムの化合物の平均粒子径は５μ
ｍ以下であることが２・要である。平均粒子径が５ Ｉ
ｔ ｍより大きい場合には、ＢａまたはＳｒフェライト
の生成に長時間分要し、その結果として粒径が大きくな
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. The average particle size of barium or strontium compounds is 5μ
2. It is important that the value is less than or equal to m. Average particle size is 5 I
When it is larger than t m, it takes a long time to generate Ba or Sr ferrite, and as a result, the grain size becomes large.
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Ｆｅ７Ｍ（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
は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 compound to barium or strontium compound is Fe7M (M is Ba or Sr) in atomic ratio of 10/1.
The ratio is preferably in the range of 1 to 14/1; outside this range, magnetoplumbite type crystals become difficult to form.
−ｉに、マグネトプランバイト型のＢａまたはＳｒフェ
ライト粉末の保磁力は、２０００〜５００００ｃ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
ード甲には保磁力が５００〜３００００ｅ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
、Ｉｎ、Ｃｒ、Ｚｎ＋Ｖ、Ｚｎ ＋Ｎｂ、Ｚｎ 十Ｔａ
、Ｃｏ ＋Ｔｉ、Ｃｏ ＋Ｖ。-i, the coercive force of magnetoplumbite-type Ba or Sr ferrite powder is 2,000 to 50,000c, which is suitable for anisotropic ferrite magnet material, but the coercive force is 500 to 30,000e for magnetic card backs. In, Cr, Zn + V, Zn + Nb, Zn + Ta to control the coercive force within this range.
, Co + Ti, Co + V.
ｃｏ 十Ｚｎ、Ｎｉ ＋Ｚｎ、Ｃｕ ＋ｚｒ、ｃｕ ＋
−Ｚｎ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グラム原子以下の門でそれぞれ
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。co 10 Zn, Ni + Zn, Cu +zr, cu +
- one or more elements or combinations of elements of Zn, iron 1
It can also be added as a compound of each element in an amount of 0.2 gram atom or less per gram atom. As compounds of each element, oxides, chlorides, carbonates, nitrates, etc. are used.
融剤である塩化ナトリウムの使用量は、出発原料に対し
て１〜１００重量％である。その量が少なすぎると目的
とする粒子形感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 sodium chloride used as a flux is 1 to 100% by weight based on the starting material. If the amount is too small, the desired particle shape cannot be obtained, and if the amount is too large, there is no advantage of increasing the amount and it is not economical.
出発原料と散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 powder.
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℃以上の温度で行う、８００℃より低い温
度では結晶化が不十分となる。Firing is performed at a temperature of 800°C or higher; crystallization will be insufficient at temperatures lower than 800°C.
得られた焼成物は水に分散させ、融岸１である塩化ナト
リウムを水洗除去した後、濾過、乾燥することにより、
六角板状で粒子が一個一個バラバラであるＢａまたはＳ
「フェライト粉末となる。The obtained fired product is dispersed in water, and after removing sodium chloride, which is the melting point 1, by washing with water, it is filtered and dried.
Ba or S, which has a hexagonal plate shape and has individual particles.
“It becomes ferrite powder.
（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
平均粒子径０．３μｍのα−Ｆｅ２０３と平均粒子径０
．７ＪＬｍのＢａＣＯ３をモル比でａ−Ｆｅ２０３：Ｂ
ａ Ｃｏ、＝５．８ ： １となるように全量で１００
ｇ！！す、これに融剤として塩化ナトリウム３０ｇを加
え、これらをボールミルを用いて乾式混合した０次いで
、混合物を９００℃で２時間焼成した後、水洗、乾燥し
てＢａフェライト粉末を得た。Example 1 α-Fe203 with an average particle size of 0.3 μm and an average particle size of 0
．． 7JLm of BaCO3 in molar ratio a-Fe203:B
The total amount is 100 so that a Co, = 5.8: 1
g! ! To this was added 30 g of sodium chloride as a flux, and these were dry mixed using a ball mill.Next, the mixture was fired at 900°C for 2 hours, 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１．０μｍて′
、粒径と厚みの比は５８であった。まな、磁気特性は保
磁力３２０００ｅ、飽和磁化６２ ｅ ｍ ｕ ／ 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インクを調製し、塗膜を形成した。As a result of scanning electron microscopy observation, the obtained Ba ferrite powder had a hexagonal plate shape with an average particle size of 1.0 μm.
, the particle size to thickness ratio was 58. The magnetic properties are coercive force 32000e, saturation magnetization 62 e mu / g
Met. An ink was prepared from this powder using a vinyl chloride-vinyl acetate polymer as a binder, and a coating film was formed.
得られた塗膜の角形比は０．８３であった。The squareness ratio of the resulting coating film was 0.83.
実施例２
ＢａＣＯ３を５ｒＣｏ３にかえたほかは、実施例１と同
様にしてＳ「フェライト粉末を得た。Example 2 S ferrite powder was obtained in the same manner as in Example 1 except that BaCO3 was replaced with 5rCo3.
得られたｓｒフェライト粉末は六角板状をしており、平
均粒子径は１．２μｍで粒径と厚みの比は６．３であっ
た。また、磁気特性は保磁力３２６００ｅ、飽和磁化６
３ ｅ ｍ ｕ ／ １；であった、塗膜の角型比は０
．８６であった。The obtained sr ferrite powder had a hexagonal plate shape, the average particle size was 1.2 μm, and the particle size to thickness ratio was 6.3. In addition, the magnetic properties are coercive force 32600e, saturation magnetization 6
The squareness ratio of the coating film was 3 e m u / 1;
．． It was 86.
実施例３
原料としてａ−Ｆｅ２０３．Ｔｉ’０２．ＣＯＯおよび
ＳｒＣＯ３をモル比でα−Ｆｅ２０３：ＴｉＯ２：Ｃｏ
Ｏ：５ｒＣ０３＝５．１６：０．８４：０．８４ ：１
となるように混合したものを用いたほかは実施例１と同
様にしてＳ「フェライト粉末を得た。Example 3 a-Fe203 as a raw material. Ti'02. COO and SrCO3 in molar ratio α-Fe203:TiO2:Co
O:5rC03=5.16:0.84:0.84:1
S' ferrite powder was obtained in the same manner as in Example 1 except that a mixture was used so that the following was obtained.
得られたＳｒフニ→イト粉末は六角板状を−ており、平
均粒子径１．１μｍで１粒径と厚みの比は６．５であっ
た。また、磁気特性は保磁力１７４０ｏｅ、飽和磁化６
０ ｅ ｍ ｕ ／ ｇであった。塗膜の角型比は０．
８７であった。The obtained Sr funite powder had a hexagonal plate shape, with an average particle size of 1.1 μm and a ratio of particle size to thickness of 6.5. In addition, the magnetic properties are coercive force 1740 oe, saturation magnetization 6
It was 0 emu/g. The squareness ratio of the coating film is 0.
It was 87.
実施例４
平均粒子径０．３μｍのα−Ｆｅ２０３、平均粒子径０
．７ μｍのＢａ Ｃｏ、ｌ、Ｎｉ ＯおよびＺｎＯを
モル比でａ−Ｆｅ、、０３ ： Ｂａ Ｃｏ、、： Ｎ
ｉ Ｏ：Ｚｎ Ｏ＝５．８＋１：０．２＋０．２となる
ように全１で１００ｇ取り、これに融剤として塩化ナト
リウム３０ｇを加え、これらをボールミルを用いて乾式
混合した０次いで、混合物を８９０℃で２時間焼成した
後、水洗、乾燥してＢａフェライト粉末を得た。Example 4 α-Fe203 with an average particle size of 0.3 μm, average particle size of 0
．． 7 μm of Ba Co, l, NiO and ZnO in molar ratio a-Fe, 03: Ba Co, ,: N
i O: Zn O = 5.8 + 1: 0.2 + 0.2, 100 g in total was taken, 30 g of sodium chloride was added as a fluxing agent, and these were dry mixed using a ball mill. After firing at 890° C. for 2 hours, it was washed with water and dried to obtain Ba ferrite powder.
得られなりａフェライト粉末は、六角板状をしており、
平均粒子径０，９５μｎ１で１粒径と厚みの比は５．０
であった。また、磁気特性は保磁力２７０００ｅ、飽和
磁化６４ ｅ ｍ ｕ ／ ｇであった。塗膜の角型比
は０．８５であった。The obtained ferrite powder has a hexagonal plate shape,
The average particle size is 0.95 μn1, and the ratio of particle size to thickness is 5.0.
Met. The magnetic properties were a coercive force of 27,000e and a saturation magnetization of 64 e mu/g. The squareness ratio of the coating film was 0.85.
実施例５
ＢａＣＯ３をＳｒＣＯ３にかえたほかは、実施例４と同
様にしてｓｒフェライト粉末を得た。Example 5 An sr ferrite powder was obtained in the same manner as in Example 4 except that BaCO3 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
均粒子径は１．０μｍで粒径と厚みの比は６．０であっ
た。また、磁気特性は保磁力２９５０ｏｅ、飽−和硫化
６４ ｅ ｍ ｕ ／ ｇであツタ、塗膜の角型比は０
．８７であった。The obtained sr ferrite powder had a hexagonal plate shape, the average particle size was 1.0 μm, and the particle size to thickness ratio was 6.0. In addition, the magnetic properties are coercive force 2950 oe, saturated sulfide 64 e mu / g, ivy, and the squareness ratio of the coating is 0.
．． It was 87.
実施例６
原料としてａ Ｆ ｅ２０３． Ｚ ｎ Ｏ、ＣＯＯ
およびＳｒ Ｃｏ３ｔモル比でａ−Ｆｅ２０３： Ｚｎ
Ｏ：ＣＯＯ： Ｓ ｒ ＣＯ３＝５．１６ ： ｏ、
８４ ： ０．８４ ：１となるように混合したものを
用いたほがは実施例４と同様にしてｓｒフェライト粉末
を得た。Example 6 A Fe203. as a raw material. Z n O, COO
and SrCo3t molar ratio a-Fe203:Zn
O: COO: S r CO3=5.16: o,
Sr ferrite powder was obtained in the same manner as in Example 4 using a mixture of 0.84:0.84:1.
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０．８５μｍで、粒径と厚みの比は６．５であ
った。また磁気特性は保磁力１７０００ｅ−１飽和磁化
６５ｅｍｕ／’ｇであった。−を膜の角型比は０．８７
であった。The obtained sr ferrite powder had a hexagonal plate shape, an average particle size of 0.85 μm, and a particle size to thickness ratio of 6.5. The magnetic properties were a coercive force of 17000e-1 and a saturation magnetization of 65 emu/'g. -The squareness ratio of the membrane is 0.87
Met.
実施例７
原料としてＦａ（○Ｈ１，（平均粒子ａｏ、０１μｍ）
、Ｃｕ Ｏ，Ｚｒ Ｏ２およびＢａＣＯ３をモル比でＦ
ｅ（ＯＨ）：ＣｕＯ： Ｚｒ Ｏ： Ｂａ Ｃｏ３＝］
０．８ ： ０．６０ ： ０．６０ ： １となる
ように混合したものを用いたほかは実施例４と同様にし
てＢａフェライト粉末を得た。Example 7 Fa (○H1, (average particle ao, 01 μm) as a raw material
, CuO, ZrO2 and BaCO3 in molar ratio F
e(OH):CuO:ZrO:BaCo3=]
Ba ferrite powder was obtained in the same manner as in Example 4, except that a mixture of 0.8:0.60:0.60:1 was used.
得られたＢａフェライト粉末は六角板状をしており、平
均粒子径０．３５μｍで、粒径と厚みの比は６．８であ
った。また磁気特性は保磁力２４５００ｅ、飽和磁化６
３．５ｅｒｒ＋ｕ、’ｇであった。塗膜の角型比は０．
８８であった。The obtained Ba ferrite powder had a hexagonal plate shape, an average particle size of 0.35 μm, and a particle size to thickness ratio of 6.8. The magnetic properties are coercive force 24500e, saturation magnetization 6
It was 3.5err+u,'g. The squareness ratio of the coating film is 0.
It was 88.
実施例８
原料としてａ Ｆ ｅ２０３、ＣＩＪ○、ＺｎＯおよ
びＢａＣＯ３をモル比でα−Ｆｅ２０３：ＣｕＯ：Ｚ
ｎ Ｏ＋、 Ｂ ａ ＣＯ３＝５．１６ ： ０．８４
： ０．８４ ：１となるように混合したものを用い
たほかは実施例４と同様にしてＢａフェライト粉末を得
た。Example 8 As raw materials a Fe203, CIJ○, ZnO and BaCO3 in molar ratio α-Fe203:CuO:Z
n O+, B a CO3=5.16: 0.84
A Ba ferrite powder was obtained in the same manner as in Example 4, except that a mixture of Ba ferrite powder having a ratio of: 0.84:1 was used.
得られたＢａフェライト粉末は六角板状をしており、平
均粒子径０．７３μｍで１粒径と原みの比は６．１であ
った。また磁気特性は保磁力１７５００ｅ、飽和磁化６
４ｅｍＵ’ｇであった 塗膜の角型比は０．８６であっ
た。The obtained Ba ferrite powder had a hexagonal plate shape, an average particle size of 0.73 μm, and a ratio of 1 particle size to original size of 6.1. In addition, the magnetic properties are coercive force 17500e, saturation magnetization 6
The squareness ratio of the coating film was 0.86.
比較例１
平均粒子径７μｍのα−Ｆｅ２０３を出発原料として用
いた他は、実施例】と同様にして、ｎａミツエライト末
を得た。Comparative Example 1 Na Mitzerite powder was obtained in the same manner as in Example except that α-Fe203 with an average particle diameter of 7 μm was used as the starting material.
得られたＢａフェライト粉末は六角板状をしており、平
均粒子径７．０μｍで、粒径と厚みの比は３．０であっ
た。またに気持性は保磁力９２００ｅ、飽和磁化３９
ｅ ｍ ｕ ／ ｇであった。塗膜の角型比は０．６３
であった。The obtained Ba ferrite powder had a hexagonal plate shape, an average particle size of 7.0 μm, and a particle size to thickness ratio of 3.0. In addition, the coercive force is 9200e, and the saturation magnetization is 39.
emu/g. The squareness ratio of the coating film is 0.63
Met.
Claims (2)
ト粉末を製造するに当り、平均粒子径５μｍ以下の鉄化
合物と平均粒子径５μｍ以下の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融剤として出発
原料に対して１〜１００重量％の塩化ナトリウムを乾式
で混合し、混合物を８００℃以上の温度で加熱焼成し、
次いで焼成粉末を洗浄して塩化ナトリウムを除去するこ
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, starting materials are used as a flux and a starting material consisting of an iron compound with an average particle size of 5 μm or less and a barium or strontium compound with an average particle size of 5 μm or less. 1 to 100% by weight of sodium chloride is mixed in a dry method, and the mixture is heated and baked at a temperature of 800 ° C. or higher,
A method for producing ferrite powder, which comprises washing the fired powder to remove sodium chloride.
Ｚｎ＋Ｔａ、Ｃｏ＋Ｔｉ、Ｃｏ＋Ｖ、Ｃｏ＋Ｚｎ、Ｎｉ
＋Ｚｎ、Ｃｕ＋Ｚｒ、Ｃｕ＋Ｚｎ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 according to claim 1, wherein one or more elements or combinations of elements of +Zn, Cu+Zr, and Cu+Zn are added as a compound of each element in an amount of 0.2 gram atom or less per 1 gram atom of iron. Powder manufacturing method.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18515986 | 1986-08-08 | ||
| JP61-185159 | 1986-08-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63156018A true JPS63156018A (en) | 1988-06-29 |
Family
ID=16165866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5665887A Pending JPS63156018A (en) | 1986-08-08 | 1987-03-13 | Production of ferrite powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63156018A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5032498A (en) * | 1973-06-11 | 1975-03-29 | ||
| JPS59146944A (en) * | 1983-02-04 | 1984-08-23 | Hitachi Metals Ltd | Manufacture of hard ferrite magnet powder |
| JPS6050323A (en) * | 1983-08-31 | 1985-03-20 | Matsushita Electric Works Ltd | Hot water heating device |
| JPS60182108A (en) * | 1984-02-29 | 1985-09-17 | Ricoh Co Ltd | Metal oxide magnetic body and magnetic film |
| JPS60240107A (en) * | 1984-05-14 | 1985-11-29 | Toshiba Corp | Magnetic powder for magnetic recording and manufacture thereof |
-
1987
- 1987-03-13 JP JP5665887A patent/JPS63156018A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5032498A (en) * | 1973-06-11 | 1975-03-29 | ||
| JPS59146944A (en) * | 1983-02-04 | 1984-08-23 | Hitachi Metals Ltd | Manufacture of hard ferrite magnet powder |
| JPS6050323A (en) * | 1983-08-31 | 1985-03-20 | Matsushita Electric Works Ltd | Hot water heating device |
| JPS60182108A (en) * | 1984-02-29 | 1985-09-17 | Ricoh Co Ltd | Metal oxide magnetic body and magnetic film |
| JPS60240107A (en) * | 1984-05-14 | 1985-11-29 | Toshiba Corp | Magnetic powder for magnetic recording and manufacture thereof |
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