JPH0483734A - Glass for adhesion - Google Patents
Glass for adhesionInfo
- Publication number
- JPH0483734A JPH0483734A JP19511990A JP19511990A JPH0483734A JP H0483734 A JPH0483734 A JP H0483734A JP 19511990 A JP19511990 A JP 19511990A JP 19511990 A JP19511990 A JP 19511990A JP H0483734 A JPH0483734 A JP H0483734A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- sendust
- water resistance
- adhesion
- ferrite
- 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
- 239000011521 glass Substances 0.000 title claims abstract description 39
- 239000000853 adhesive Substances 0.000 claims abstract description 16
- 230000001070 adhesive effect Effects 0.000 claims abstract description 16
- 229910000702 sendust Inorganic materials 0.000 abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 6
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 3
- 229910003069 TeO2 Inorganic materials 0.000 abstract description 3
- 229910052681 coesite Inorganic materials 0.000 abstract description 3
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 3
- 229910052682 stishovite Inorganic materials 0.000 abstract description 3
- LAJZODKXOMJMPK-UHFFFAOYSA-N tellurium dioxide Chemical compound O=[Te]=O LAJZODKXOMJMPK-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052905 tridymite Inorganic materials 0.000 abstract description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract 3
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 abstract 2
- 238000013329 compounding Methods 0.000 abstract 1
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 abstract 1
- 238000009877 rendering Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 101100296544 Caenorhabditis elegans pbo-5 gene Proteins 0.000 description 1
- 229910020489 SiO3 Inorganic materials 0.000 description 1
- 229910004273 TeO3 Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/24—Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders
- C03C8/245—Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders containing more than 50% lead oxide, by weight
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、メタル・イン・ギャップ（以下ＭＩＧという
）タイプの磁気ヘッドに用いられる接着用ガラスに関し
、より詳しくはフェライトコアのギャップ部分にセンダ
スト膜が形成されたＭＩＧタイプの磁気ヘッドに用いら
れる接着用ガラスに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an adhesive glass used in a metal-in-gap (hereinafter referred to as MIG) type magnetic head. The present invention relates to adhesive glass used in MIG type magnetic heads on which a film is formed.
［従来の技術］
磁気記録に用いられる磁気ヘッドには種々のタイプが存
在しているが、その一つにＭＩＧタイプと呼ばれる高密
度記録用ヘッドがあり、ノ１−ドディスクやＶＴＲ等に
広く使用されている。このタイプの磁気ヘッドは、フェ
ライトコアのギャップ部分にセンダスト等の金属膜を形
成した後、フェライトコア同士を接着して作製される。[Prior Art] There are various types of magnetic heads used for magnetic recording, one of which is a high-density recording head called the MIG type, which is widely used in node disks, VTRs, etc. It is used. This type of magnetic head is manufactured by forming a metal film such as sendust in the gap between ferrite cores and then bonding the ferrite cores together.
フェライトコアの接着には接着用ガラスが用いられるが
、センダスト膜を形成したＭＩＧタイプの磁気ヘッドに
用いられる接着用ガラスには、特に下記の特性が要求さ
れる。Adhesive glass is used to adhere the ferrite core, and the adhesive glass used in the MIG type magnetic head on which the sendust film is formed is particularly required to have the following properties.
■フェライトにあった熱膨張係数を有すること。■Have a thermal expansion coefficient matching that of ferrite.
（センダストの熱膨張係数はフェライトのそれに比べて
かなり高いが、膜厚が５μ前後と極めて薄いために、ガ
ラスとセンダストの熱膨張係数に差があっても残留応力
がほとんど生じない。）■センダストの特性が劣化した
り、フェライトコアからセンダスト膜が剥離しないよう
に、６５０℃以下で熱処理できること。(The coefficient of thermal expansion of Sendust is considerably higher than that of ferrite, but because the film thickness is extremely thin at around 5 μm, almost no residual stress occurs even if there is a difference in the coefficient of thermal expansion between glass and Sendust.) ■ Sendust Heat treatment can be performed at a temperature of 650°C or lower to prevent the properties of the ferrite from deteriorating or the sendust film from peeling off from the ferrite core.
■耐水性に優れていること。■Have excellent water resistance.
■センダストを侵蝕しないこと。■Do not erode sendust.
■ヘッドの後加工の際にギャップ深さが測定できるよう
に、透光性を有すること。■It must be transparent so that the gap depth can be measured during post-processing of the head.
このような要求特性を満足するために、従来よりＰｂＯ
−Ｂ２Ｏ３系ガラスやＰｂＯ−５ｊ０２−Ｂ２Ｏ３系ガ
ラス等種々の接着用ガラスが提案されている。In order to satisfy these required characteristics, PbO
Various adhesive glasses such as -B2O3 type glass and PbO-5j02-B2O3 type glass have been proposed.
［発明が解決しようとする問題点コ
しかしながら従来の接着用ガラスは、いずれも先記した
要求特性の全てを満たすものではなく、特に■の耐水性
及び■のセンダストを侵蝕しないという要求特性を十分
に満足させるものが存在しないのが現状である。[Problems to be solved by the invention] However, none of the conventional adhesive glasses satisfies all of the above-mentioned required properties. The current situation is that there is nothing that satisfies them.
本発明の目的は、先記要求特性の全てを満足させる接着
用ガラス、特に耐水性に優れ、しかもセンダストを侵蝕
しない接着用ガラスを提供することである。An object of the present invention is to provide an adhesive glass that satisfies all of the above-mentioned required properties, particularly an adhesive glass that has excellent water resistance and does not corrode sendust.
［問題点を解決するための手段］
本発明者等は上記目的を達成するために様々な研究を行
った結果、ｐｂｏ−ｓｔｏ系のガラスにＴｅＯ２を含有
させることにより、ガラスの耐水性が改善されること、
及びＢ２Ｏ３成分がセンダストの侵蝕に関係しているこ
とを見いだし、本発明として提案するものである。[Means for Solving the Problems] The present inventors conducted various studies to achieve the above object, and found that by incorporating TeO2 into pbo-sto glass, the water resistance of the glass was improved. to be done,
It has been found that the and B2O3 components are related to the corrosion of sendust, and this is proposed as the present invention.
即ち、本発明の接着用ガラスは、重量百分率でＰｂＯ５
５〜７０％、ＳｉＯ２２０〜３０％、７１０１〜４％、
Ｎａ２００〜５％、３１２０３０〜５％、Ｆｅ２０３０
〜１％、ＴｅＯ３０，５〜１５％からなり、本質的にＢ
２Ｏ３を含有しないことを特徴とする。That is, the adhesive glass of the present invention contains PbO5 in weight percentage.
5-70%, SiO2 20-30%, 7101-4%,
Na200~5%, 312030~5%, Fe2030
~1%, TeO30,5-15%, essentially B
It is characterized by not containing 2O3.
［作用コ
本発明の接着用ガラスは、３０〜３００″Ｃにおける熱
膨張係数がフェライトのそれ（１００〜１２０ Ｘｌ０
−７／℃）にあう９０〜１１５ Ｘｌ０−７／’Ｃであ
り、また軟化点が４９０〜５４０℃であるため、６５０
℃以下の熱処理温度でフエライトファ同士を接着でき、
しかも耐水性に優れ、センダストを侵蝕しない透光性の
あるガラスである。[Function] The adhesive glass of the present invention has a coefficient of thermal expansion at 30 to 300"C that of ferrite (100 to 120
-7/℃), and the softening point is 490-540℃, so 650
Ferrite fibers can be bonded together at heat treatment temperatures below ℃,
Moreover, it is a transparent glass that has excellent water resistance and does not corrode sendust.
次に、本発明の接着用ガラスの組成を上記のように限定
した理由を以下に述べる。Next, the reason why the composition of the adhesive glass of the present invention is limited as described above will be described below.
ＰｂＯはガラスを低融点化させる成分であり、その含有
量は５５〜７０％である。Ｐｂｏが５５％より少ないと
軟化点が高くなって６５０°Ｃ以下の温度で熱処理する
ことができず、７０％より多いと耐水性が慝くなる。PbO is a component that lowers the melting point of glass, and its content is 55 to 70%. When Pbo is less than 55%, the softening point becomes high and heat treatment cannot be performed at a temperature below 650°C, and when it is more than 70%, water resistance becomes poor.
５ｉｎ２はガラス化範囲を広げる成分であり、その含有
量は２０〜３０％である。ＳｉＯ３が２θ％より少ない
と耐水性が悪くなり、３０％より多いと軟化点が高くな
る。5in2 is a component that expands the vitrification range, and its content is 20 to 30%. If SiO3 is less than 2θ%, water resistance will be poor, and if it is more than 30%, the softening point will be high.
ＺｎＯはガラスの熱膨張係数を上げずに低融点化させる
成分であり、その含有量は１〜４％である。ZnO is a component that lowers the melting point of glass without increasing its coefficient of thermal expansion, and its content is 1 to 4%.
ＺｎＯが１％より少ないと上記した効果がなり、４％よ
り多いとガラスが結晶化しやすくなる。When ZnO is less than 1%, the above-mentioned effect is produced, and when it is more than 4%, the glass tends to crystallize.
Ｎａ２Ｏはガラスの熱膨張係数を調整するために添加す
る成分であり、その含有量は０〜５％である。Na2O is a component added to adjust the thermal expansion coefficient of glass, and its content is 0 to 5%.
Ｎａ２Ｏが５％より多いと耐水性が悪くなる。If Na2O is more than 5%, water resistance will deteriorate.
Ｂ１゜０３はガラスを低融点化させる成分であり、その
含有量は０〜５％である。Ｂ１□０３が５％より多いと
ガラスが着色して不透明になり、ヘッドの後加工の際に
ギャップ深さの測定が困難になる等の問題が生じる。B1°03 is a component that lowers the melting point of glass, and its content is 0 to 5%. If B1□03 is more than 5%, the glass becomes colored and opaque, causing problems such as difficulty in measuring the gap depth during post-processing of the head.
Ｆｅ２Ｏ３はフェライトやセンダストとのなじみを良く
する成分であり、その含有量は０〜１％である。Ｆｅ２
Ｏ３が１％より多いとガラスが着色して不透明となり、
Ｂ１□０３と同様後加工の際に不都合が生じる。Fe2O3 is a component that improves compatibility with ferrite and sendust, and its content is 0 to 1%. Fe2
If O3 is more than 1%, the glass becomes colored and opaque.
Similar to B1□03, inconvenience occurs during post-processing.
さらに本発明は上記成分に加えて、ＴｅＯ３を０．５〜
１５％含有することにより、優れた耐水性を有する。Ｔ
ｅＯ□の含有量が０．５％より少ないと上記した効果が
なく、１５％より多いと軟化点が高くなり過ぎる。Furthermore, in addition to the above components, the present invention contains TeO3 from 0.5 to
By containing 15%, it has excellent water resistance. T
If the content of eO□ is less than 0.5%, the above-mentioned effects will not be obtained, and if it is more than 15%, the softening point will become too high.
また本発明においてＢ２Ｏ３を含有しない理由は、この
成分を含有するとガラスがセンダストを侵蝕し易くなる
ためである。Further, the reason why B2O3 is not contained in the present invention is that if this component is contained, the glass tends to corrode sendust.
［実施例コ
以下、本発明の接着用ガラスを実施例に基いて説明する
。[Examples] The adhesive glass of the present invention will be explained below based on Examples.
次表は本発明の実施例（試料Ｎα１〜５）及び比較例（
試料Ｎα６）を示すものである。The following table shows examples of the present invention (samples Nα1 to 5) and comparative examples (
Sample Nα6) is shown.
以下余白 表のＮα１〜６の各試料は次のようにして調製した。Margin below Each sample of Nα1 to Nα6 in the table was prepared as follows.
まず、重量百分率で表の組成となるように調合した原料
バッチを白金坩堝に入れ、１１００℃で１時間溶融し、
所定の形状に成形して試料を作製した後、熱膨張係数、
軟化点、作業温度を測定し、また耐水性及びセンダスト
に対する侵蝕の有無について評価した。First, a raw material batch prepared to have the composition shown in the table in terms of weight percentage was placed in a platinum crucible and melted at 1100°C for 1 hour.
After preparing the sample by molding it into a predetermined shape, the coefficient of thermal expansion,
The softening point and working temperature were measured, and the water resistance and the presence or absence of corrosion against sendust were evaluated.
表から明らかなように、実施例であるＮα１〜５の各試
料は熱膨張係数が９０〜１１５ Ｘｌ０−７／ ”Ｃ１
軟化点が４９０〜５４０℃、熱処理温度が５８０〜６５
０℃の値を示し、耐水性が良であり、センダストに対す
る侵蝕は認められなかった。これに対して比較例である
Ｎ［１Ｂの試料は熱膨張係数が１００ Ｘｌ０−’／℃
、軟化点が５００℃、熱処理温度が６３０°Ｃであった
が、耐水性が不良であり、またセンダストに対する侵蝕
が認められた。As is clear from the table, each of the samples Nα1 to Nα5 as examples has a thermal expansion coefficient of 90 to 115 Xl0-7/”C1
Softening point: 490-540℃, heat treatment temperature: 580-65℃
It showed a value of 0°C, had good water resistance, and showed no corrosion against sendust. On the other hand, the comparative example N[1B sample has a thermal expansion coefficient of 100 Xl0-'/℃
Although the softening point was 500°C and the heat treatment temperature was 630°C, the water resistance was poor and corrosion against sendust was observed.
これらの事実は、本発明の接着用ガラスが耐水性に優れ
、しかもセンダストの侵蝕を起こさないことを示してい
る。These facts indicate that the adhesive glass of the present invention has excellent water resistance and does not cause sendust corrosion.
なお、熱膨張係数は各ガラスを５φＸ２０ｍｍのロッド
状に成形した試料を用いて、平均線熱膨張係数測定器に
よって測定した。軟化点は１５０メツシユのふるいを通
過させたガラス粉末を用いて、示差熱分析計によって測
定した。熱処理温度は、フェライトコア同士の接着に必
要な流動性が得られる温度、即ちガラスの粘度カ月０４
ポアズを示すときの温度を高温粘性測定器により測定し
た。また耐水性は、各ガラスをＩＯＸ ２５Ｘ ３ ｍ
ｍの短冊状に成形した試料を純水中に浸漬して３０分間
煮沸した後、その表面を目視によって観察したものであ
り、表面状態が変わらない場合は良、白濁を生じたもの
は不良とした。さらにセンダストに対する侵蝕の有無は
、表面が鏡面研磨された１０ Ｘ ２０ Ｘ ３ ＋ａ
ｍの大きさのセンダスト上に、０．５φＸ２０ｍｍのロ
ッド状に成形したガラスを載置し、表中の熱処理温度で
処理することによって試料を作製した後、試料中央部を
切断してその切断面を電子顕微鏡にて観察したものであ
る。The coefficient of thermal expansion was measured using an average linear thermal expansion coefficient measuring device using a sample of each glass molded into a rod shape of 5φ×20 mm. The softening point was measured using a differential thermal analyzer using glass powder passed through a 150 mesh sieve. The heat treatment temperature is the temperature at which the fluidity necessary for adhesion between ferrite cores is obtained, that is, the viscosity of the glass is 04
The temperature at which poise was exhibited was measured using a high temperature viscosity meter. In addition, the water resistance of each glass is IOX 25 x 3 m
After immersing a sample formed into a rectangular shape of m in diameter in pure water and boiling it for 30 minutes, the surface was visually observed. If the surface condition did not change, it was considered good, and if it became cloudy, it was considered bad. did. Furthermore, the presence or absence of corrosion against sendust is determined by the surface of the mirror-polished 10 x 20 x 3 +a
A sample was prepared by placing glass molded into a rod shape of 0.5φ x 20mm on Sendust with a size of was observed using an electron microscope.
［効果］
以上説明したように、本発明の接着用ガラスは元肥要求
特性のすべてを満足し、特に耐水性に優れるとともにセ
ンダストを侵蝕しないガラスであるために、センダスト
膜を形成したＭＩＧタイプの磁気ヘッドの接着に好適で
ある。[Effects] As explained above, the adhesive glass of the present invention satisfies all of the characteristics required for base fertilizer, has particularly excellent water resistance, and does not corrode sendust, so it is suitable for use with MIG type magnetic Suitable for adhering heads.
特許出願人 日本電気硝子株式会社 代表者 岸 １）清 作Patent applicant: Nippon Electric Glass Co., Ltd. Representative Kishi 1) Kiyoshi Saku
Claims (1)
２０〜３０％、ＺｎＯ１〜４％、Ｎａ＿２Ｏ０〜５％、
Ｂｉ＿２Ｏ＿３０〜５％、Ｆｅ＿２Ｏ＿３０〜１％、Ｔ
ｅＯ＿２０．５〜１５％からなり、本質的にＢ＿２Ｏ＿
３を含有しないことを特徴とする接着用ガラス。(1) In weight percentage, PbO55-70%, SiO_2
20-30%, ZnO1-4%, Na_2O0-5%,
Bi_2O_30-5%, Fe_2O_30-1%, T
Consisting of eO_20.5-15%, essentially B_2O_
An adhesive glass characterized in that it does not contain 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2195119A JP2944716B2 (en) | 1990-07-24 | 1990-07-24 | Adhesive glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2195119A JP2944716B2 (en) | 1990-07-24 | 1990-07-24 | Adhesive glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0483734A true JPH0483734A (en) | 1992-03-17 |
| JP2944716B2 JP2944716B2 (en) | 1999-09-06 |
Family
ID=16335812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2195119A Expired - Fee Related JP2944716B2 (en) | 1990-07-24 | 1990-07-24 | Adhesive glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2944716B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5958115A (en) * | 1997-02-28 | 1999-09-28 | EXCOR Korrosionsschutz-Technolgien und--Produkte GmbH | Corrosion-inhibiting composite material |
| EP1178019A1 (en) * | 1999-11-30 | 2002-02-06 | Kabushiki Kaisha Ohara | Optical glass |
-
1990
- 1990-07-24 JP JP2195119A patent/JP2944716B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5958115A (en) * | 1997-02-28 | 1999-09-28 | EXCOR Korrosionsschutz-Technolgien und--Produkte GmbH | Corrosion-inhibiting composite material |
| EP1178019A1 (en) * | 1999-11-30 | 2002-02-06 | Kabushiki Kaisha Ohara | Optical glass |
| EP1178019A4 (en) * | 1999-11-30 | 2006-04-05 | Ohara Kk | Optical glass |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2944716B2 (en) | 1999-09-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |