JPH03271171A - Method for preparing mn-zn ferrite joined product - Google Patents
Method for preparing mn-zn ferrite joined productInfo
- Publication number
- JPH03271171A JPH03271171A JP2072745A JP7274590A JPH03271171A JP H03271171 A JPH03271171 A JP H03271171A JP 2072745 A JP2072745 A JP 2072745A JP 7274590 A JP7274590 A JP 7274590A JP H03271171 A JPH03271171 A JP H03271171A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite
- single crystal
- crystals
- joining
- subjected
- 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
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title abstract description 19
- 239000013078 crystal Substances 0.000 claims abstract description 42
- 238000005304 joining Methods 0.000 claims abstract description 7
- 238000003746 solid phase reaction Methods 0.000 claims abstract description 7
- 238000001513 hot isostatic pressing Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 abstract description 6
- 230000003746 surface roughness Effects 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 230000002706 hydrostatic effect Effects 0.000 abstract 2
- 238000001354 calcination Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- -1 MnC1z Chemical class 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910000372 mercury(II) sulfate Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
- 235000009529 zinc sulphate Nutrition 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- Magnetic Heads (AREA)
- Soft 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、磁気記録再生装置、特にはＶＴＲの磁気ヘッ
ドに使用されるＭｎ−Ｚｎフェライト単結晶とＭｎ−Ｚ
ｎフェライト多結晶との接合体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 Mn-Zn ferrite single crystals and Mn-Zn ferrite single crystals used in magnetic recording/reproducing devices, particularly magnetic heads of VTRs.
The present invention relates to a method for manufacturing a bonded body with n-ferrite polycrystal.
（従来の技術）
Ｍｎ−Ｚｎフェライト単結晶は、ＶＴＲ用磁気ヘッドの
材料として広く使用されているが、摺動ノイズが大きい
ため、近年の磁気記録の高密度化要求に対応できず、大
きな問題となってきており、早急な解決が望まれている
。一方、Ｍｎ−Ｚｎフェライト多結晶は摺動ノイズが小
さいものの、結晶粒の脱落が生じ易く、狭ギヤツプ加工
が難しい、寿命が短いなどの欠点を有しているため、Ｖ
ＴＲ用磁気ヘッドには・使用されなかった。このため、
Ｍｎ−Ｚｎフェライト単結晶とＭｎ−Ｚｎフェライト多
結晶との接合体を用いた磁気ヘッドが使用されてきてい
る。(Prior art) Mn-Zn ferrite single crystal is widely used as a material for magnetic heads for VTRs, but due to its large sliding noise, it cannot meet the recent demands for higher density magnetic recording, which has caused a major problem. Therefore, an immediate solution is desired. On the other hand, although Mn-Zn ferrite polycrystal has low sliding noise, it has drawbacks such as easy crystal grain dropout, difficulty in narrow gap machining, and short life.
It was not used in TR magnetic heads. For this reason,
Magnetic heads using a composite of Mn--Zn ferrite single crystal and Mn--Zn ferrite polycrystal have been used.
（発明が解決しようとする課題）
この接合体を用いた磁気ヘッドには、媒体が摺動する面
に単結晶を配置しその他の部分に多結晶を配置する構成
のものと、ギャップを形成する面に単結晶を配置しその
他の部分に多結晶を配置する構成のものが知られており
、これらの磁気ヘッドでは単結晶と多結晶は固相反応に
より直接接合されたものが使用されている。この接合体
の多結晶としては、通常の焼結法により製造されたＭｎ
−Ｚｎフェライト（以下、焼結フェライトという）また
はホットプレス法により製造されたＭｎ−Ｚｎフェライ
ト（以下、）ＩＰフェライトという）が一般に用いられ
ている。しかしながら、これらの多結晶フェライトは気
孔が多く、また結晶粒径も太きいため結晶粒の脱落が生
じ易く加工性が悪いので、接合に必要な粗さの鏡面を得
ることが難しく、接合歩留り低下の原因となったり、加
工時に欠は等を生じ易く、加工歩留り低下の一因であっ
た。(Problem to be Solved by the Invention) A magnetic head using this bonded body has a structure in which a single crystal is arranged on the surface on which the medium slides and a polycrystal in other parts, and a magnetic head in which a gap is formed. There are known magnetic heads that have single crystals on one surface and polycrystals on the other parts, and these magnetic heads use single crystals and polycrystals that are directly joined by solid phase reaction. . The polycrystal of this joined body is Mn manufactured by a normal sintering method.
-Zn ferrite (hereinafter referred to as sintered ferrite) or Mn-Zn ferrite (hereinafter referred to as IP ferrite) produced by a hot pressing method is generally used. However, these polycrystalline ferrites have many pores and large crystal grains, making them easy to fall off and have poor workability. This makes it difficult to obtain a mirror surface with the roughness required for bonding, resulting in a decrease in bonding yield. This has been a cause of problems, and tends to cause chipping during processing, contributing to a decrease in processing yield.
従って、本発明の課題は、上記多結晶フェライトの加工
性を改善し、単結晶との接合を容易にし、接合及び加工
歩留りを改善することにある。Therefore, an object of the present invention is to improve the workability of the polycrystalline ferrite, facilitate bonding with a single crystal, and improve bonding and processing yields.
（課題を解決するための手段）
本発明者等は、前述の問題点を解決するため、特に多結
晶の特性を改善することに注力し、熱間静水圧プレスで
製造されたＭｎ−Ｚｎフェライト多結晶が有効であるこ
とを見出し、本発明を完成させた。本発明の要旨は、
Ｍｎ−Ｚｎフェライト単結晶と熱間静水圧プレス法によ
り得られたＭｎ−Ｚｎフェライト多結晶とを固相反応に
より直接接合することを特徴とするＭｎ−Ｚｎフェライ
ト接合体の製造方法である。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present inventors focused on improving the properties of polycrystals in particular, and developed Mn-Zn ferrite manufactured by hot isostatic pressing. They discovered that polycrystals are effective and completed the present invention. The gist of the present invention is to provide an Mn-Zn ferrite bonded body, which is characterized in that an Mn-Zn ferrite single crystal and an Mn-Zn ferrite polycrystal obtained by hot isostatic pressing are directly joined by solid phase reaction. This is the manufacturing method.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
先ず、接合体に使用するＭｎ−Ｚｎフェライト単結晶お
よび多結晶の組成は路間−であることが必要であり、こ
のＭｎ−Ｚｎフェライト単結晶は、公知のブリッジマン
法により作製される。First, it is necessary that the composition of the Mn--Zn ferrite single crystal and polycrystal used in the bonded body be in the range of 1-2, and this Mn--Zn ferrite single crystal is produced by the well-known Bridgman method.
また、Ｍｎ−Ｚｎフェライト多結晶は、単結晶と同様仮
焼物を作り、これを粉砕後、通常の焼結法、ホットプレ
ス法および熱間静水圧プレス法により作製する。Moreover, Mn--Zn ferrite polycrystal is produced by making a calcined product in the same way as a single crystal, and after pulverizing it, it is produced by the usual sintering method, hot pressing method, and hot isostatic pressing method.
本発明の最大の特徴はＭｎ−Ｚｎフェライト多結晶の製
造に熱間静水圧プレス法を採用したことである。この方
法により得られたＭｎ−Ｚｎフェライト多結晶（以下、
ＨＩＰフェライトという）は、焼結フェライトやＨＰフ
ェライトに比較して気孔が少なく、結晶粒も小さいため
、結晶粒が脱落し難く、加工性に優れ単結晶との接合歩
留が改善される。しかしながら、 ＨＩＰフェライトは
ＨＩＰ処理された時の温度よりも高い温度で熱処理する
と、）ＩＩＰ処理でつぶされた気孔が蘇生してきたり、
結晶粒が成長するため、結晶粒の脱落が生じ易くなり、
加工性が悪化する。従ってＭｎ−Ｚｎフェライト単結晶
と多結晶を接合する際の熱処理温度は、ＨＩＰフェライ
トがＨＩＰ処理された時の温度もしくはそれ以下の温度
で熱処理することが好ましい。The most important feature of the present invention is that hot isostatic pressing is employed to produce Mn--Zn ferrite polycrystals. The Mn-Zn ferrite polycrystal obtained by this method (hereinafter referred to as
Compared to sintered ferrite and HP ferrite, HIP ferrite has fewer pores and smaller crystal grains, so the crystal grains are less likely to fall off and have excellent workability, improving the bonding yield with single crystals. However, when HIP ferrite is heat-treated at a temperature higher than the temperature at which it was HIP-treated, the pores crushed by the IIP treatment will be revived.
As crystal grains grow, crystal grains tend to fall off,
Workability deteriorates. Therefore, the heat treatment temperature when joining the Mn--Zn ferrite single crystal and the polycrystal is preferably the temperature at which the HIP ferrite is subjected to the HIP treatment or a temperature lower than that.
この固相反応による接合に当たっては、先ず、単結晶お
よび多結晶の接合面を共に表面粗さＲｍａｘを０．１μ
ｍ程度の鏡面に加工することが必要である。次いで、こ
の鏡面にした接合面同志を重ね合わせ、Ｍｎ−Ｚｎフェ
ライト粉とアルミナ粉の混合粉中に埋設し、２ ｋｇ／
ｃｍ”以上の圧力をかけながら前記温度条件下に熱処理
し、接合すれば良い。In joining by this solid phase reaction, first, the surface roughness Rmax of both the single crystal and polycrystal joint surfaces is set to 0.1 μm.
It is necessary to process it into a mirror surface of about m. Next, the mirror-finished joint surfaces were overlapped and buried in a mixed powder of Mn-Zn ferrite powder and alumina powder, and 2 kg/
They may be bonded by heat treatment under the above-mentioned temperature conditions while applying a pressure of 1.5 cm or more.
この固相反応による接合方法には、１）上述したような
接合面を直接加熱圧着する方法の他に、２）接合助剤と
してＨＣｌ、 ＨＮＯｓ、 ＨｇＳＯ４，Ｈ３Ｐ０．等
の無機酸を塗布する方法、３） ＭｎＣ１ｚ、ＺｎＣ１
ｚ、 Ｍｎ （ＮＯ３） ２、Ｚｎ（Ｎｏｎ）２．Ｍｎ
５Ｑ４、ＺｎＳＯ４，Ｍｎｓ （ＰＯ４）２、ｚｎｓ（
ｐｏ４）ｚ等の金属塩類の水溶液を塗布する方法等があ
るが、これらを本発明と併用することは任意である。This solid-phase reaction bonding method includes 1) the above-mentioned method of directly heat-pressing the bonding surfaces, and 2) the use of HCl, HNOs, HgSO4, H3P0. 3) Method of applying inorganic acids such as MnC1z, ZnC1
z, Mn (NO3) 2, Zn (Non) 2. Mn
5Q4, ZnSO4, Mns (PO4)2, zns(
There are methods of applying an aqueous solution of metal salts such as po4)z, but it is optional to use these in combination with the present invention.
以下、本発明を実施例と比較例を挙げて具体的に説明す
るが、本発明はこれらに限定されるものではない。EXAMPLES The present invention will be specifically described below with reference to Examples and Comparative Examples, but the present invention is not limited thereto.
（実施例１）
Ｆｅ、Ｏｎ ５３モル％、Ｍｎ０３０モル％、Ｚｎ０１
７モル％をボールミルを用いて混合し、１２００℃で仮
焼した。この仮焼物を粉砕して白金のルツボの中に投入
し溶解した後、ルツボを徐々に降下し、ルツボ先端から
単結晶化させ、Ｍｎ−Ｚｎフェライト単結晶を作製した
。このＭｎ−Ｚｎフェライト単結晶インゴットより２０
ｍｍＸ ２０ｍｍＸ ｌ ｍｍｔのプレートを切り出し
、２０ｍｍＸ ２０ｍｍの面を接合面として、表面粗さ
Ｒｍａｘが０．０８μｍの鏡面に加工した。(Example 1) Fe, On 53 mol%, Mn0 30 mol%, Zn01
7 mol% was mixed using a ball mill and calcined at 1200°C. This calcined material was crushed, put into a platinum crucible, and melted, and then the crucible was gradually lowered and single crystallized from the tip of the crucible to produce a Mn--Zn ferrite single crystal. 20 from this Mn-Zn ferrite single crystal ingot
A plate measuring mm x 20 mm x l mmt was cut out and processed into a mirror surface with a surface roughness Rmax of 0.08 μm using the 20 mm x 20 mm surface as a bonding surface.
この単結晶とほぼ同じ組成である焼結フェライト、ＨＰ
フェライトおよびＨＩＰフェライトの３種類の多結晶フ
ェライトを作製し、２０ｍｍＸ ２０ｍｍＸ ２ｍｍｔ
のプレートを切り出した。これら３種類の多結晶の製造
条件は次の通りである。Sintered ferrite, which has almost the same composition as this single crystal, HP
Three types of polycrystalline ferrites, ferrite and HIP ferrite, were produced, and the size was 20 mm x 20 mm x 2 mm.
I cut out the plate. The manufacturing conditions for these three types of polycrystals are as follows.
焼結フェライト−平衡酸素分圧下１．３００°Ｃで５時
間焼成。Sintered ferrite - sintered at 1.300°C for 5 hours under equilibrium oxygen partial pressure.
ＨＰフェライト 空気中で１．２５０℃×２時間、
圧力３００ｋｇ／ｃｍ２゜
ＨＩＰフェライト□Ａｒ中１．２００℃×１時間、圧力
１０００ｋｇ／ｃｍ２゜
これら多結晶も２０ｍｍＸ ２０ｍｍの面を単結晶と同
じ方法で鏡面に加工した。比較のために作製した焼結フ
ェライトおよびＨＰフェライトでは結晶粒の脱落が生じ
ており、表面粗さの悪化がみられた。HP ferrite 1.250℃ x 2 hours in air,
Pressure: 300 kg/cm2° HIP ferrite□Ar in 1.200°C x 1 hour, pressure: 1000 kg/cm2° These polycrystals were also machined into mirror-finished surfaces measuring 20 mm x 20 mm in the same manner as the single crystals. In the sintered ferrite and HP ferrite produced for comparison, crystal grains had fallen off and surface roughness had deteriorated.
次に上記のように作製したＭｎ−Ｚｎフェライト単結晶
及び多結晶の鏡面にした接合面同志を重ね合わせ、Ｍｎ
−Ｚｎフェライト粉とアルミナ粉の混合粉中に埋設し、
５ ｋｇ／ｃｍ２の圧力をかけながら１．２００℃で熱
処理し接合した。この接合歩留りを第１表に示す。また
、これらの接合体にトラック巾２０μｍのトラック加工
を行ない、その際の加工歩留りについても第１表に併記
した。Next, the mirror-finished joint surfaces of the Mn-Zn ferrite single crystal and polycrystal produced as described above are stacked together, and the Mn-Zn ferrite single crystal and polycrystalline
- Embedded in a mixed powder of Zn ferrite powder and alumina powder,
They were heat-treated at 1.200° C. while applying a pressure of 5 kg/cm 2 to join. The bonding yield is shown in Table 1. Further, these joined bodies were subjected to track processing with a track width of 20 μm, and the processing yields at that time are also listed in Table 1.
第１表
（実施例２）
Ｍｎ−Ｚｎフェライト単結晶とＨＩＰ法で製造した多結
晶との接合熱処理温度を１．１５０．１，２００．１．
３００℃とした以外は、実施例１と同一条件でＭｎ−Ｚ
ｎフェライト接合体結晶を作製した。その多結晶部の気
孔率および平均粒径は第２表のようであった。Table 1 (Example 2) The bonding heat treatment temperature between the Mn-Zn ferrite single crystal and the polycrystal produced by the HIP method was 1.150.1, 200.1.
Mn-Z was prepared under the same conditions as in Example 1 except that the temperature was 300°C.
An n-ferrite junction crystal was produced. The porosity and average grain size of the polycrystalline portion were as shown in Table 2.
第２表
接合時の温度がＨＩＰ時の温度である１、 ２００℃を
越えると、気孔率が増加し、結晶粒が成長してしまうこ
とが判かる。Table 2 shows that when the temperature during bonding exceeds 1,200°C, which is the temperature during HIP, the porosity increases and crystal grains grow.
４、発明の効果
本発明は、Ｍｎ−Ｚｎフェライト単結晶と熱間静水圧プ
レス法により得られたＭｎ−Ｚｎフェライト多結晶とを
固相反応により直接接合することを特徴とするＭｎ−Ｚ
ｎフェライト接合体の製造方法であって、本発明によれ
ば、Ｍｎ−Ｚｎフェライト単結晶とＭｎ−Ｚｎフェライ
ト多結晶との接合体を磁気特性に影響を及ぼす不純物を
接合剤として使用することなく、直接接合でき、磁気特
性の劣化のない高品質のＭｎ−Ｚｎフェライト接合体を
歩留り良く製造でき、加工歩留りも高いので、産業上そ
の利用価値は極めて大きい。4. Effects of the invention The present invention is an Mn-Zn ferrite single crystal and an Mn-Zn ferrite polycrystal obtained by a hot isostatic pressing method, which are directly bonded by a solid phase reaction.
A method for manufacturing an n-ferrite bonded body according to the present invention, in which a bonded body of an Mn-Zn ferrite single crystal and an Mn-Zn ferrite polycrystal is manufactured without using impurities that affect magnetic properties as a bonding agent. Since it can be directly bonded, a high-quality Mn-Zn ferrite bonded body without deterioration of magnetic properties can be manufactured at a high yield, and the processing yield is also high, its utility value is extremely large in industry.
Claims (1)
により得られたＭｎ−Ｚｎフェライト多結晶とを固相反
応により直接接合することを特徴とするＭｎ−Ｚｎフェ
ライト接合体の製造方法。1. A method for producing an Mn-Zn ferrite bonded body, which comprises directly joining an Mn-Zn ferrite single crystal and an Mn-Zn ferrite polycrystal obtained by hot isostatic pressing through a solid phase reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2072745A JPH03271171A (en) | 1990-03-22 | 1990-03-22 | Method for preparing mn-zn ferrite joined product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2072745A JPH03271171A (en) | 1990-03-22 | 1990-03-22 | Method for preparing mn-zn ferrite joined product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03271171A true JPH03271171A (en) | 1991-12-03 |
Family
ID=13498203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2072745A Pending JPH03271171A (en) | 1990-03-22 | 1990-03-22 | Method for preparing mn-zn ferrite joined product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03271171A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007088215A (en) * | 2005-09-22 | 2007-04-05 | Doshisha | Magnetic substance material and its manufacturing method |
-
1990
- 1990-03-22 JP JP2072745A patent/JPH03271171A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007088215A (en) * | 2005-09-22 | 2007-04-05 | Doshisha | Magnetic substance material and its manufacturing method |
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