JPS63307122A - Barium ferrite magnetic powder and production thereof - Google Patents
Barium ferrite magnetic powder and production thereofInfo
- Publication number
- JPS63307122A JPS63307122A JP13984987A JP13984987A JPS63307122A JP S63307122 A JPS63307122 A JP S63307122A JP 13984987 A JP13984987 A JP 13984987A JP 13984987 A JP13984987 A JP 13984987A JP S63307122 A JPS63307122 A JP S63307122A
- Authority
- JP
- Japan
- Prior art keywords
- gram atoms
- magnetic powder
- barium ferrite
- ferrite magnetic
- gram
- 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.)
- Granted
Links
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 33
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 title claims description 36
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000002244 precipitate Substances 0.000 claims abstract description 25
- 229910001854 alkali hydroxide Inorganic materials 0.000 claims abstract description 17
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 230000004907 flux Effects 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 229910052788 barium Inorganic materials 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 8
- 239000007858 starting material Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- 238000009826 distribution Methods 0.000 abstract description 11
- 239000007864 aqueous solution Substances 0.000 abstract description 9
- 229910052725 zinc Inorganic materials 0.000 abstract description 5
- 238000010304 firing Methods 0.000 abstract description 4
- 229910052718 tin Inorganic materials 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 239000008367 deionised water Substances 0.000 description 9
- 229910021641 deionized water Inorganic materials 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 230000005415 magnetization Effects 0.000 description 8
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 8
- 235000011121 sodium hydroxide Nutrition 0.000 description 7
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 6
- 229910001863 barium hydroxide Inorganic materials 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 5
- 229910001981 cobalt nitrate Inorganic materials 0.000 description 5
- 238000010335 hydrothermal treatment Methods 0.000 description 5
- 238000000634 powder X-ray diffraction Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 2
- 229910001626 barium chloride Inorganic materials 0.000 description 2
- 150000001553 barium compounds Chemical class 0.000 description 2
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910052595 hematite Inorganic materials 0.000 description 2
- 239000011019 hematite Substances 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- -1 Si and Ca Chemical class 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- TVQLLNFANZSCGY-UHFFFAOYSA-N disodium;dioxido(oxo)tin Chemical compound [Na+].[Na+].[O-][Sn]([O-])=O TVQLLNFANZSCGY-UHFFFAOYSA-N 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 229940079864 sodium stannate Drugs 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
- 150000003606 tin compounds Chemical class 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/009—Compounds containing, besides iron, two or more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0018—Mixed oxides or hydroxides
- C01G49/0036—Mixed oxides or hydroxides containing one alkaline earth metal, magnesium or lead
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0018—Mixed oxides or hydroxides
- C01G49/0063—Mixed oxides or hydroxides containing zinc
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G51/00—Compounds of cobalt
- C01G51/006—Compounds containing, besides cobalt, two or more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/006—Compounds containing, besides nickel, two or more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/42—Magnetic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、六方晶マグネトプランバイｌ−型バリウムフ
ェライト磁性粉およびその製造方法に関するものである
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hexagonal magnetoplumbyl-type barium ferrite magnetic powder and a method for producing the same.
さらに詳しくは、本発明は高密度記録用の磁気記録媒体
に用いるのに適した、比表面積が２０〜７０ｒｒＩｌ／
ｇ、保磁力が２００〜１５０００ｅ、飽和磁化が６０
ｅｍｕ／ｇ程度かそれ以上であり、保磁力の温度変化が
小さく、かつ異方性磁界分布がシャープなマグネト１ラ
ンバイＩ−型バリウムフエライト磁性粉およびその製造
方法に関するものである。More specifically, the present invention is suitable for use in magnetic recording media for high-density recording, and has a specific surface area of 20 to 70 rrIl/
g, coercive force 200-15000e, saturation magnetization 60
The present invention relates to a magneto-1 runby I-type barium ferrite magnetic powder having a magnetic field strength of about emu/g or more, a small temperature change in coercive force, and a sharp anisotropic magnetic field distribution, and a method for producing the same.
近年、磁気記録の高密度化の要求に伴い、バリウムフェ
ライト磁性粉を磁気記録媒体として用いる垂直磁気記録
方式の開発が進められている。In recent years, with the demand for higher density magnetic recording, development of perpendicular magnetic recording systems using barium ferrite magnetic powder as a magnetic recording medium has been progressing.
垂直磁気記録方式に用いられるバリウムフェライＩ・磁
性粉としては、保磁力が適当な値（２００〜１５０００
ｅ）で、飽和磁化ができるだけ高く、保磁力の温度変化
が小さく、しかも異方性磁界分布がシャープなものが望
まれている。The barium ferrite I magnetic powder used in the perpendicular magnetic recording system has a coercive force of an appropriate value (200 to 15,000
For e), it is desired that the saturation magnetization is as high as possible, the coercive force changes little with temperature, and the anisotropic magnetic field distribution is sharp.
（従来の技術およびその問題点）
従来、バリウムフェライト磁性粉の製造方法としては、
例えば共沈法、ガラス結晶化法、水熱合成法等種々の方
法が知られており、ガラス結晶化法については特公昭Ｇ
ｏ−１５５７４号公報、水熱合成法については、例えば
特開昭５９−１７５７０７号公報、特公昭６０−１２９
７３号公報、特公昭６０−１５５７６号公報、特開昭６
０−１３７００２号公報等で提案されている。(Conventional technology and its problems) Conventionally, as a method for producing barium ferrite magnetic powder,
For example, various methods are known, such as coprecipitation, glass crystallization, and hydrothermal synthesis.
Regarding the hydrothermal synthesis method, see Japanese Patent Application Laid-Open No. 59-175707, Japanese Patent Publication No. 60-129.
Publication No. 73, Japanese Patent Publication No. 60-15576, Japanese Patent Publication No. 60-15576
This method has been proposed in JP 0-137002 and the like.
ところで、バリウムフェライト磁性粉を磁気記録媒体と
して使用するためには、保磁力が温度変化に対して安定
であること、および異方性磁界分布がシャープであるこ
とが必要である。しかしながら、前記いずれの方法にお
いても得られるバリウムフェライト磁性粉は保磁力の温
度変化が大きいという欠点があった。By the way, in order to use barium ferrite magnetic powder as a magnetic recording medium, it is necessary that the coercive force be stable against temperature changes and that the anisotropic magnetic field distribution be sharp. However, the barium ferrite magnetic powder obtained by any of the above methods has a drawback in that the coercive force varies greatly with temperature.
一方、保磁力の温度変化を小さくする方法として、特開
昭６２−５１０２６号公報には、ｓｎを添加することが
記載されているが、Ｓｎを添加することにより、飽和磁
化が低下してしまい、さらに異方性磁界分布が広くなる
という問題があった。On the other hand, as a method for reducing the temperature change in coercive force, Japanese Patent Application Laid-Open No. 62-51026 describes adding Sn, but adding Sn reduces the saturation magnetization. Furthermore, there was a problem that the anisotropic magnetic field distribution became wider.
（発明の目的）
本発明の目的は、前記問題点を解決し、微粒子で比表面
積が２０〜７０ｒ＆／（＋、保磁力が２００〜１５００
０ｅ、飽和磁化が６０８ｍＬＩ／（］程度かそれ以上で
あり、保磁力の温度変化が小さく、しかも異方性磁界分
布がシャープであり、高密度記録用の磁気記録媒体に用
いるのに適したバリウムフェライト磁性粉およびその製
造方法を提供することにある。(Objective of the Invention) The object of the present invention is to solve the above-mentioned problems, and to obtain particles with a specific surface area of 20 to 70r&/(+) and a coercive force of 200 to 1500.
Barium is suitable for use in magnetic recording media for high-density recording because it has a saturation magnetization of about 608 mLI/() or more, a small temperature change in coercive force, and a sharp anisotropic magnetic field distribution. An object of the present invention is to provide a ferrite magnetic powder and a method for producing the same.
（問題点を解決するための手段）
本発明者等は、鋭意検討の結果、バリウムフェライト磁
性粉のＦＱ原子の一部をＣｏ −３ｎ −Ｚｎという特
定の組合わせて置換することにより、保磁力の温度変化
が小さく、かつ飽和磁化が高くしかも異方性磁界分布が
シャープなものが得られることを見出した。(Means for Solving the Problem) As a result of intensive studies, the present inventors have found that by replacing some of the FQ atoms of barium ferrite magnetic powder with a specific combination of Co-3n-Zn, the coercive force can be increased. We have found that it is possible to obtain a material with a small temperature change, a high saturation magnetization, and a sharp anisotropic magnetic field distribution.
すなわち、本発明は、一般式
％式％））
（ただし、ＭはＣＯまたは、ＣＯおよびＮｉを示し、ｎ
＝ ０．８〜１．２．０．１ ＜ ｘ ＜ １．５、
ｏ、１＜ｙ〈１．５．０．１ ＜ ｚ ＜ １．５であ
り、かつｙ （ｘ −＋−ｚである。）で表される六方
晶マグネトプランバイＩ〜型バリウムフェライト磁性粉
およびその製造方法に関する。That is, the present invention is based on the general formula %) (where M represents CO or CO and Ni, and n
= 0.8~1.2.0.1 < x < 1.5,
Hexagonal magnetopranby I~ type barium ferrite magnetic powder, where o, 1<y<1.5.0.1<z<1.5, and y (x −+−z) and its manufacturing method.
本発明においては、出発原料として、バリウム１グラノ
λ原子に対して鉄１−１２グラム原子、鉄１．２−ｘ−
ｙ−ｚグラム原子に対して、ＭがＸグラム原子、錫がＸ
グラム原子および亜鉛がＺグラム原子の割合のそれぞれ
の元素の化合物を用い、該出発原料を水に溶解し、これ
に混合後の溶液中の水酸化アルカリ濃度が３モル／ｊ以
トとなるように水酸化アルカリを加えて沈澱物を生成さ
せ、該沈澱物を含むスラリを１３０〜３００℃で水熱処
理した後、生成した沈澱物に融剤を混合し、混合物を７
００〜９５０℃で焼成し、得られた焼成物を洗浄するこ
とにより、前記六方晶マグネト１ランバイ１〜型バリウ
ムフエライト磁性粉が得られる。In the present invention, the starting materials used are 1-12 gram atoms of iron per 1 grano λ atom of barium, and 1.2-x-
For y-z gram atom, M is X gram atom and tin is X
Using a compound of each element in which gram atom and zinc have a ratio of Z gram atom, the starting materials are dissolved in water, and the alkali hydroxide concentration in the solution after mixing is 3 mol/j or more. After adding an alkali hydroxide to form a precipitate and hydrothermally treating the slurry containing the precipitate at 130 to 300°C, a fluxing agent is mixed with the formed precipitate, and the mixture is heated to 70°C.
By firing at 00 to 950°C and washing the fired product, the hexagonal magneto 1 runby 1~ type barium ferrite magnetic powder is obtained.
本発明においては、まず出発原料であるバリウム、鉄、
Ｍ、錫および亜鉛のそれぞれの化合物を水に溶解し、こ
れに水酸化アルカリを加えて沈澱物を生成させる。In the present invention, the starting materials barium, iron,
Each compound of M, tin and zinc is dissolved in water, and alkali hydroxide is added thereto to form a precipitate.
バリウム化合物としては、硝酸バリウム、塩化バリウム
、水酸化バリウム等が用いられる。バリウムの使用量は
、バリウム濃度が０．０３〜０．５０モル１０の範囲に
なるようにするのが六方晶の結晶性のよい粒子を得るう
えで望ましい。As the barium compound, barium nitrate, barium chloride, barium hydroxide, etc. are used. The amount of barium used is preferably such that the barium concentration is in the range of 0.03 to 0.50 mol 10 in order to obtain hexagonal particles with good crystallinity.
鉄化合物としては、硝酸第二鉄、塩化第二鉄等が用いら
れる。鉄の使用量はバリウム１グラム原子に対して１〜
１２グラム原子である。鉄の量が少なすぎると、マグネ
トブランバイト型バリウムフェライトの生成量が少なく
、結晶性も悪くなる。As the iron compound, ferric nitrate, ferric chloride, etc. are used. The amount of iron used is 1 to 1 gram atom of barium.
It is a 12 gram atom. If the amount of iron is too small, the amount of magnetobrambite barium ferrite produced will be small and the crystallinity will be poor.
また鉄の量が多すぎるとヘマタイトが副生したり、また
バリウムフェライトの粒子が大きくなり、磁気特性も劣
ってくる。Furthermore, if the amount of iron is too large, hematite may be produced as a by-product, and barium ferrite particles may become large, resulting in poor magnetic properties.
Ｍの化合物としては、ＣＯまたは、ＣＯおよびＮｉの塩
化物、硝酸塩等が用いられる。As the compound M, CO or a chloride or nitrate of CO and Ni is used.
錫の化合物としては、塩化錫、硝酸外、錫酸ソーダ等が
用いられる。As the tin compound, tin chloride, nitric acid, sodium stannate, etc. are used.
亜鉛の化合物としては、塩化亜鉛、硝酸亜鉛等が用いら
れる。As the zinc compound, zinc chloride, zinc nitrate, etc. are used.
Ｍ、ｍ、亜鉛の使用量は鉄１２−ｘ−ｙ−ｚグラム原子
に対して、ＭがＸグラム原子、錫がｙグラム原子、亜鉛
が２グラム原子であり、０．１＜ｘ＜１．５，０．１＜
ｙ＜１．５．０．１ ＜ ｚ ＜ １．５であり、かつ
ｙ ＜ ｘ ＋ ｚである。ｘ、ｙ、ｚが前記範囲を外
れると、保磁力の温度変化が°小さく、かつ飽和磁化が
高くしかも異方性磁界分布がシャープなものが得られな
い。The amount of M, m, and zinc used is 12-xy-z gram atoms of iron, M is X gram atoms, tin is y gram atoms, and zinc is 2 gram atoms, and 0.1<x<1 .5,0.1<
y<1.5.0.1<z<1.5 and y<x+z. If x, y, and z are outside the above ranges, it will not be possible to obtain a material in which the temperature change in coercive force is small, the saturation magnetization is high, and the anisotropic magnetic field distribution is sharp.
水酸化アルカリとしては、水酸化ナトリウム、水酸化カ
リウム等が用いられる。水酸化アルカリの使用量は水酸
化アルカリを混合した後の溶液中の水酸化アルカリ濃度
が３モル／１以上となる量が必要であり、４〜８モル／
ＩＪの範囲が好ましい。As the alkali hydroxide, sodium hydroxide, potassium hydroxide, etc. are used. The amount of alkali hydroxide used must be such that the alkali hydroxide concentration in the solution after mixing the alkali hydroxide is 3 mol/1 or more, and 4 to 8 mol/1.
A range of IJ is preferred.
水酸化アルカリの量が少なすぎると粒子が大きくなった
り、粒度分布が広くなったり、またへマタイトが生成す
る。また水酸化アルカリを過度に多くするのは経済的で
ない。If the amount of alkali hydroxide is too small, the particles become large, the particle size distribution becomes wide, and hematite is generated. Further, it is not economical to increase the amount of alkali hydroxide excessively.
前記出発原料の水溶液に水酸化アルカリを混合する方法
については、特に制限はないが、例えば出発原料の水溶
液に、直接水酸化アルカリを添加するか、あるいは水酸
化アルカリの水溶液を添加する方法がある。あるいはバ
リウム化合物を水酸化アルカリの水溶液側に加えて、こ
れと鉄を含む水溶液を混合する方法がある。There is no particular restriction on the method of mixing the alkali hydroxide into the aqueous solution of the starting material, but for example, there are methods of directly adding the alkali hydroxide or adding an aqueous solution of the alkali hydroxide to the aqueous solution of the starting material. . Alternatively, there is a method of adding a barium compound to the aqueous solution of alkali hydroxide and mixing this with an aqueous solution containing iron.
さらに、予め出発原料の水溶液あるいは水酸化アルカリ
の水溶液にＳｉ 、Ｃａなどの水に可溶性の化合物、例
えばケイ酸、ケイ酸ナトリウム、硝酸カルシウム、塩化
カルシウム等を若干添加することができる。これらの添
加物は粒子形状を制御するうえで好ましい。Furthermore, a small amount of water-soluble compounds such as Si and Ca, such as silicic acid, sodium silicate, calcium nitrate, and calcium chloride, can be added in advance to the aqueous solution of the starting material or the aqueous solution of alkali hydroxide. These additives are preferred for controlling particle shape.
次に、沈澱物を含むスラリを水熱処理することにより、
バリウムフェライトの微細な結晶が生成、沈澱する。水
熱処理の温度は１３０〜３００℃、好ましくは１４０〜
２８０℃である。温度が低すぎると結晶の生成が充分で
なく、また温度が高すぎると最終的に得られるバリウム
フェライト粉末の粒径が大きくなるので好ましくない。Next, by hydrothermally treating the slurry containing the precipitate,
Fine crystals of barium ferrite are formed and precipitated. The temperature of hydrothermal treatment is 130-300℃, preferably 140-300℃
The temperature is 280°C. If the temperature is too low, crystal formation will not be sufficient, and if the temperature is too high, the particle size of the final barium ferrite powder will become large, which is not preferable.
水熱処理時間は普通、０．５〜２０時間程度であり、水
熱処理には通常、オートクレーブが採用される。The hydrothermal treatment time is usually about 0.5 to 20 hours, and an autoclave is usually employed for the hydrothermal treatment.
次いで、水熱処理により生成した微細な結晶の沈澱物を
水洗して、遊離のアルカリ分を除去した後、得られた沈
澱物に融剤を混合する。融剤としては、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お
よびフッ化ナトリウムのうち少なくとも一種が用いられ
る。融剤の使用量は沈澱物（乾燥物基準）に対して、１
０〜１８０重量％、好ましくは３０〜１２０重量％が適
当である。融剤の量が少なすぎると粒子の焼結が起り、
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。沈澱物と融剤の混合方法は特に制限はなく、例
えば沈澱物のスラリに融剤を加えて湿式混合した後、ス
ラリを乾燥してもよく、あるいは沈澱物を乾燥した後、
融剤を加えて乾式混合してもよい。Next, the fine crystal precipitate produced by the hydrothermal treatment is washed with water to remove free alkali, and then a flux is mixed with the obtained precipitate. As the flux, at least one of sodium chloride, potassium chloride, barium chloride, strontium chloride, and sodium fluoride is used. The amount of flux used is 1 for the precipitate (dry basis).
0 to 180% by weight, preferably 30 to 120% by weight is suitable. If the amount of flux is too small, sintering of the particles will occur,
Furthermore, if there is too much, there is no advantage to increasing it, and it is not economical. There is no particular restriction on the method of mixing the precipitate and the flux; for example, after adding the flux to the precipitate slurry and wet-mixing, the slurry may be dried, or after drying the precipitate,
Dry mixing may be performed by adding a fluxing agent.
次いで、得られた混合物を焼成することにより、バリウ
ムフェライトの結晶化が完全に行われる。Next, the resulting mixture is fired to completely crystallize the barium ferrite.
焼成温度は７００〜・９５０℃、好ましくは８００〜９
３０℃である。温度が低すぎると結晶化が進まず、飽和
磁化が低くなる。また温度が高すぎると粒子が大きくな
ったり、焼結が起こるので好ましくない。焼成時間は１
０分〜３０時間程度が適当である。焼成雰囲気は特に制
限されないが、一般に空気雰囲気が便利である。Firing temperature is 700-950℃, preferably 800-950℃
The temperature is 30°C. If the temperature is too low, crystallization will not proceed and the saturation magnetization will become low. Furthermore, if the temperature is too high, the particles become large and sintering occurs, which is not preferable. Baking time is 1
Approximately 0 minutes to 30 hours is appropriate. The firing atmosphere is not particularly limited, but an air atmosphere is generally convenient.
得られた焼成物を洗浄後、濾過、乾燥することにより、
バリウムフェライト磁性粉が得られる。By washing, filtering and drying the obtained baked product,
Barium ferrite magnetic powder is obtained.
洗浄は焼成物中の融剤、過剰のバリウムなどの不純物を
十分に除去できればよどのような方法で行ってもよい。The cleaning may be carried out by any method as long as impurities such as flux and excess barium in the fired product can be sufficiently removed.
洗浄液としては水や硝酸、塩酸などの無機酸、酢酸、プ
ロピオン酸などの有機酸などを用いることができる。As the cleaning liquid, water, inorganic acids such as nitric acid and hydrochloric acid, and organic acids such as acetic acid and propionic acid can be used.
（実施例）
実施例１
脱イオン水１３００ｍ、ｌｌに、硝酸第二鉄［Ｆｅ（Ｎ
ｏ ） −９Ｈ２０］ １，２８７．６ｇ、硝酸コバ
ルｌ−［Ｃ０（Ｎｏ３）２ ・６）（２０］ ７１．３
ｇ、塩化錫［Ｓｎ ＣｆＪ４］ ４８．０ ｇおよび硝
酸亜鉛［Ｚｎ（ＮＯ３）２・６Ｈ２０］ １８．２ｇを
溶解し、別に脱イオン水１３００ｍＪに、水酸化バリウ
ム［Ｂａ（ＯＨ）２・８ＦＩ２０］９６．７ｇ、カセイ
ソーダ（ＮａＯＨ）１４８０ｇを溶解し、再溶液を混合
して沈澱物を生成させた。(Example) Example 1 Ferric nitrate [Fe(N
o) -9H20] 1,287.6g, cobal nitrate l-[C0(No3)2 ・6)(20] 71.3
g, 48.0 g of tin chloride [Sn CfJ4] and 18.2 g of zinc nitrate [Zn(NO3)2.6H20] were dissolved, and separately, barium hydroxide [Ba(OH)2.8FI20] was dissolved in 1300 mJ of deionized water. 96.7g and 1480g of caustic soda (NaOH) were dissolved, and the solutions were remixed to form a precipitate.
得られた沈澱物を含むスラリをオートクレーブに入れ、
１４５℃で８時間水熱処理を行った。次いで得られた沈
澱物を十分に水洗した後、濾過、乾燥し、これに融剤と
してＮａ Ｃｌ＋とＢａＣｌ２・２Ｈ２０の重量比が１
：１の混合物を沈澱物に対して１００重量％加えて混合
した。この混合物を空気雰囲気下で８６０℃で２時間焼
成した。得られた焼成物を水で十分水洗した後、濾過、
乾燥してバリウムフェライト磁性粉を得た。The resulting slurry containing the precipitate was placed in an autoclave;
Hydrothermal treatment was performed at 145°C for 8 hours. Next, the obtained precipitate was thoroughly washed with water, filtered and dried, and a flux of NaCl+ and BaCl2.2H20 in a weight ratio of 1 was added to the precipitate.
:100% by weight of the mixture was added to the precipitate and mixed. This mixture was calcined at 860° C. for 2 hours under an air atmosphere. After washing the obtained baked product thoroughly with water, filtration,
After drying, barium ferrite magnetic powder was obtained.
得られたバリウムフェライ１〜磁性粉は、Ｘ線粉末回折
スペクトルおよび組成分析の結果、ｎ ａ ｏ °（Ｆ
８１０．４６００．８８００．６”００．２０１７．８
）であり、マグネトブランバイト型であった。As a result of X-ray powder diffraction spectrum and composition analysis, the barium ferrite 1 to magnetic powder obtained had n a o ° (F
810.4600.8800.6”00.2017.8
), and was of the magnetobrambite type.
またこのバリウムフェライト磁性粉について振動試料式
磁力計で磁気特性を測定した結果を第１表に示す。なお
、保磁力の温度変化は２０℃〜１５０℃で測定し、異方
性磁界分布は半値幅で表した。Table 1 shows the results of measuring the magnetic properties of this barium ferrite magnetic powder using a vibrating sample magnetometer. Note that the temperature change in coercive force was measured at 20° C. to 150° C., and the anisotropic magnetic field distribution was expressed in terms of half-width.
実施例２
脱イオン水１３００ｍ、ｌｌに、硝酸第二鉄１２８７．
６ｇ、硝酸コバルト７１．３ｇ、塩化錫３２．０ｇおよ
び硝酸亜鉛３６．５ｇを溶解し、別に脱イオン水１３０
０ｍｊに、水酸化バリウム９６．７ｇ、カセイソーダ１
４８０ｇを溶解し、再溶液を混合して沈澱物を生成させ
た。Example 2 To 1300 ml of deionized water, add 1287 ml of ferric nitrate.
Dissolve 6 g of cobalt nitrate, 71.3 g of cobalt nitrate, 32.0 g of tin chloride and 36.5 g of zinc nitrate, and separately add 130 g of deionized water.
0mj, barium hydroxide 96.7g, caustic soda 1
480 g was dissolved and remixed to form a precipitate.
次いで、実施例１と同様にしてバリウムフェライ１〜磁
性粉を得た。Next, barium ferrite 1 to magnetic powder were obtained in the same manner as in Example 1.
得られたバリウムフェライト磁性粉は、Ｘ線粉末回折ス
ペクトルおよび組成分析の結果、Ｂ８０’ （Ｆｏｌｏ
、４６００．８ ８’０．４７００．４°１７．６）で
あり、マグネト１ランバイＩ〜型であった。As a result of X-ray powder diffraction spectrum and composition analysis, the obtained barium ferrite magnetic powder was found to be B80' (Folo
, 4600.8 8' 0.4700.4° 17.6), and was of the magneto 1 runby type I~.
またこのバリウムフェライト磁性粉について実施例１と
同様にして磁気特性を測定した結果を第１表に示す。Furthermore, the magnetic properties of this barium ferrite magnetic powder were measured in the same manner as in Example 1, and the results are shown in Table 1.
実施例３
脱イオン水１３００ｒｒ＋ｌｌに、硝酸第二鉄１２８７
．６ｇ、硝酸コバルト５３．５ｇ、硝酸ニッケル［Ｎ
ｉ （Ｎ Ｏ３）２ ・６Ｈ２０］ １７．８ｇ、塩化
錫３２．０ｇおよび硝酸亜鉛３６．５ｇを溶解し、別に
脱イオン水１３００ｍＪ）に、水酸化バリウム９６．７
ｇ、カセイソーダ１４８０ｇを溶解し、再溶液を混合し
て沈澱物を生成させた。Example 3 Ferric nitrate 1287 to 1300rr+ll of deionized water
．． 6g, cobalt nitrate 53.5g, nickel nitrate [N
i (N O3)2 ・6H20], 32.0 g of tin chloride and 36.5 g of zinc nitrate were dissolved, and 96.7 g of barium hydroxide was dissolved separately in 1300 mJ of deionized water).
g, and 1480 g of caustic soda were dissolved, and the solutions were remixed to form a precipitate.
次いで、実施例１と同様にしてバリウムフェライト磁性
粉を得た。Next, barium ferrite magnetic powder was obtained in the same manner as in Example 1.
得られたバリウムフェライト磁性粉は、Ｘ線粉末回折ス
ペクトルおよび組成分析の結果、ＢａＯｏ（Ｆｏｌｏ、
４ Ｃ００，６Ｎ’０．２８ｎ０．４”０．４０１７．
６）であり、マグネトプランバイ１〜型であった。As a result of X-ray powder diffraction spectrum and composition analysis, the obtained barium ferrite magnetic powder was found to be BaOo (Folo,
4 C00,6N'0.28n0.4"0.4017.
6) and were magnetopranby types 1 to 1.
またこのバリウムフェライト磁性粉について実施例１と
同様にして磁気特性を測定した結果を第１表に示す。Furthermore, the magnetic properties of this barium ferrite magnetic powder were measured in the same manner as in Example 1, and the results are shown in Table 1.
比較例１
脱イオン水１３００ｍＪ）に、硝酸第二鉄１２８７．６
ｇ、硝酸コバルト７１．３ｇおよび四塩化チタン４６．
３ｇを溶解し、別に脱イオン水１３００ｍｇに、水酸化
バリウム９６．７ｇおよびカセイソーダ１４８０ｇを溶
解し、再溶液を混合して沈澱物を生成させた。Comparative Example 1 Ferric nitrate (1287.6 mJ) in deionized water (1300 mJ)
g, cobalt nitrate 71.3 g and titanium tetrachloride 46.g.
Separately, 96.7 g of barium hydroxide and 1480 g of caustic soda were dissolved in 1300 mg of deionized water, and the solutions were mixed again to form a precipitate.
次いで、実施例１と同様にしてバリウムフェライト磁性
粉を得た。Next, barium ferrite magnetic powder was obtained in the same manner as in Example 1.
得られたバリウムフェライト磁性粉は、Ｘ線粉末回折ス
ペクトルおよび組成分析の結果、ＢａＯｏ（Ｆ’ ｅｌ
ｏ、 ４ｑ Ｏｏ、、 ｓ”ｌ” ｊ ｏ、 ａ°１８
）であり、マグネトブランバイト型であった。As a result of X-ray powder diffraction spectrum and composition analysis, the obtained barium ferrite magnetic powder was found to be BaOo (F' el
o, 4q Oo,, s”l” j o, a°18
), and was of the magnetobrambite type.
またこのバリウムフェライト磁性粉について実施例１と
同様にして磁気特性を測定した結果を第１表に示す。Furthermore, the magnetic properties of this barium ferrite magnetic powder were measured in the same manner as in Example 1, and the results are shown in Table 1.
比較例２
脱イオン水１３００ｍ、Ｏに、硝酸第二鉄１２８７．６
ｇ、硝酸コバルト７１．３ｇおよび塩化錫７３゜０ｇを
溶解し、別に脱イオン水１３００ｍＪに、水酸化バリウ
ム９６．７ｇおよびカセイソーダ１４８０ｇを溶解し、
両温液を混合して沈澱物を生成させた。Comparative Example 2 1300 m of deionized water, O, 1287.6 ferric nitrate
g, 71.3 g of cobalt nitrate and 73.0 g of tin chloride were dissolved, and separately, 96.7 g of barium hydroxide and 1480 g of caustic soda were dissolved in 1300 mJ of deionized water.
Both hot liquids were mixed to form a precipitate.
次いで、実施例１と同様にしてバリウムフェライト磁性
粉を得た。Next, barium ferrite magnetic powder was obtained in the same manner as in Example 1.
得られたバリウムフェライト磁性粉は、Ｘ線粉末回折ス
ペクトルおよび組成分析の結果、Ｂ ａ Ｏ、（Ｆ ｅ
ｌｏ、 ４ ＣＯｏ、 ａＳ ｎｏ、 ａｏ １ｓ ）
であり、マグネトブランバイト型であった。As a result of X-ray powder diffraction spectrum and composition analysis, the obtained barium ferrite magnetic powder was found to contain B a O, (F e
lo, 4 COo, aS no, ao 1s)
It was a magnetobrambite type.
またこのバリウムフェライト磁性粉について実施例１と
同様にして磁気特性を測定した結果を第１表に示す。Furthermore, the magnetic properties of this barium ferrite magnetic powder were measured in the same manner as in Example 1, and the results are shown in Table 1.
（発明の効果）
本発明によれば、一般式
％式％））
（ただし、ＭはＣｏまたは、ＣＯおよびＮｉを示し、ｎ
＝０．８〜１．２．０．１ ＜ ｘ ＜ １．５．０．
１＜ｙ＜１．５．０．１ ＜ ７． ＜ １．５であり
、かつｙ＜ｘ＋ｚである。）で表される六方晶マグネト
ブランバイト型バリウムフェライト磁性粉が得られる。(Effects of the Invention) According to the present invention, the general formula %)) (where M represents Co or CO and Ni, and n
=0.8~1.2.0.1 < x < 1.5.0.
1<y<1.5.0.1<7. <1.5 and y<x+z. ) A hexagonal magnetoblanbite type barium ferrite magnetic powder is obtained.
このバリウムフェライト磁性粉は従来のものと比較して
、飽和磁化が６０ ｅｍｕ／ａ程度かそれ以上で、保磁
力の温度変化が小さく、かつ異方性磁界分布がシャープ
であり、磁気記録媒体に用いるのに適している。Compared to conventional powders, this barium ferrite magnetic powder has a saturation magnetization of about 60 emu/a or more, a small temperature change in coercive force, and a sharp anisotropic magnetic field distribution, making it suitable for magnetic recording media. suitable for use.
Claims (2)
＿ｘＳｎ＿ｙＺｎ＿ｚＯ＿１＿８＿−＿（＿ｘ＿−＿ｙ
＿＋＿Ｚ＿）＿／＿２）（ただし、ＭはＣｏまたは、Ｃ
ｏおよびＮｉを示し、ｎ＝０．８〜１．２、０．１＜ｘ
＜１．５、０．１＜ｙ＜１．５、０．１＜ｚ＜１．５で
あり、かつｙ＜ｘ＋ｚである。）で表される六方晶マグ
ネトプランバイト型バリウムフェライト磁性粉。(1) General formula BaO・n(Fe_1_2_-_x_-_y_-_zM
_xSn_yZn_zO_1_8_-_(_x_-_y
＿＋＿Z＿)＿／＿２）(However, M is Co or C
o and Ni, n=0.8-1.2, 0.1<x
<1.5, 0.1<y<1.5, 0.1<z<1.5, and y<x+z. ) Hexagonal magnetoplumbite type barium ferrite magnetic powder.
鉄が１〜１２グラム原子、鉄１２−ｘ−ｙ−ｚグラム原
子に対して、Ｍがｘグラム原子、錫がｙグラム原子およ
び亜鉛がｚグラム原子の割合のそれぞれの元素の化合物
を用い、該出発原料を水に溶解し、これに混合後の溶液
中の水酸化アルカリ濃度が３モル／ｌ以上となるように
水酸化アルカリを加えて沈澱物を生成させ、該沈澱物を
含むスラリを１３０〜３００℃で水熱処理した後、生成
した沈澱物に融剤を混合し、混合物を７００〜９５０℃
で焼成し、得られた焼成物を洗浄することを特徴とする
一般式 ＢａＯ・ｎ（Ｆｅ＿１＿２＿−＿ｘ＿−＿ｙ＿−＿ｚＭ
＿ｘＳｎ＿ｙＺｎ＿ｚＯ＿１＿８＿−＿（＿ｘ＿−＿ｙ
＿＋＿ｚ＿）＿／＿２）（ただし、ＭはＣｏまたは、Ｃ
ｏおよびＮｉを示し、ｎ＝０．８〜１．２、０．１＜ｘ
＜１．５、０．１＜ｙ＜１．５、０．１＜ｚ＜１．５で
あり、かつｙ＜ｘ＋ｚである。）で表される六方晶マグ
ネトプランバイト型バリウムフェライト磁性粉の製造方
法。(2) As starting materials, 1 to 12 gram atoms of iron per 1 gram atom of barium, x gram atoms of M, y gram atoms of tin, and y gram atoms of tin for 12-x-y-z gram atoms of iron. Using a compound of each element in a proportion of z gram atoms, the starting materials are dissolved in water, and alkali hydroxide is added to this so that the alkali hydroxide concentration in the solution after mixing is 3 mol/l or more. After a slurry containing the precipitate is hydrothermally treated at 130 to 300°C, a flux is mixed with the generated precipitate, and the mixture is heated to 700 to 950°C.
General formula BaO・n(Fe_1_2_-_x_-_y_-_zM
_xSn_yZn_zO_1_8_-_(_x_-_y
＿＋＿z＿)＿／＿２）(However, M is Co or C
o and Ni, n=0.8-1.2, 0.1<x
<1.5, 0.1<y<1.5, 0.1<z<1.5, and y<x+z. ) A method for producing hexagonal magnetoplumbite type barium ferrite magnetic powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62139849A JPH06104576B2 (en) | 1987-06-05 | 1987-06-05 | Barium ferrite magnetic powder and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62139849A JPH06104576B2 (en) | 1987-06-05 | 1987-06-05 | Barium ferrite magnetic powder and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63307122A true JPS63307122A (en) | 1988-12-14 |
| JPH06104576B2 JPH06104576B2 (en) | 1994-12-21 |
Family
ID=15254960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62139849A Expired - Lifetime JPH06104576B2 (en) | 1987-06-05 | 1987-06-05 | Barium ferrite magnetic powder and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06104576B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6442104A (en) * | 1987-08-08 | 1989-02-14 | Toshiba Corp | Magnetic powder for magnetic recording |
| JPH04214605A (en) * | 1990-10-11 | 1992-08-05 | Toshiba Corp | Magnetic powder for magnetic recording use |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61219720A (en) * | 1985-03-25 | 1986-09-30 | Central Glass Co Ltd | Production of particulate magnet plumbite-type ferrite |
| JPS63193505A (en) * | 1987-02-06 | 1988-08-10 | Toshiba Corp | Magnetic powder for high density magnetic recording and magnetic recording medium using the powder |
-
1987
- 1987-06-05 JP JP62139849A patent/JPH06104576B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61219720A (en) * | 1985-03-25 | 1986-09-30 | Central Glass Co Ltd | Production of particulate magnet plumbite-type ferrite |
| JPS63193505A (en) * | 1987-02-06 | 1988-08-10 | Toshiba Corp | Magnetic powder for high density magnetic recording and magnetic recording medium using the powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6442104A (en) * | 1987-08-08 | 1989-02-14 | Toshiba Corp | Magnetic powder for magnetic recording |
| JPH04214605A (en) * | 1990-10-11 | 1992-08-05 | Toshiba Corp | Magnetic powder for magnetic recording use |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06104576B2 (en) | 1994-12-21 |
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