JPH05105479A - Low temperature melt sticking glass composition - Google Patents
Low temperature melt sticking glass compositionInfo
- Publication number
- JPH05105479A JPH05105479A JP30255191A JP30255191A JPH05105479A JP H05105479 A JPH05105479 A JP H05105479A JP 30255191 A JP30255191 A JP 30255191A JP 30255191 A JP30255191 A JP 30255191A JP H05105479 A JPH05105479 A JP H05105479A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- glass composition
- ferrite
- temperature
- magnetic
- 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.)
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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
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- 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
【０００１】[0001]
【産業上の利用分野】本発明は、550 ℃以下で溶融する
ことが可能で、かつ、化学的耐久性に優れた低温融着性
ガラス組成物に関し、更に詳しくは、磁気ヘッド用の磁
性材料の融着、特に、表面にセンダスト薄膜等の金属磁
性膜を形成したフェライトヘッドの融着に好適な低温融
着性ガラス組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low temperature fusible glass composition capable of melting at 550 ° C. or lower and having excellent chemical durability. More specifically, it relates to a magnetic material for a magnetic head. The present invention relates to a low-temperature fusing glass composition suitable for fusing, in particular, fusing a ferrite head having a metal magnetic film such as a sendust thin film formed on the surface thereof.
【０００２】[0002]
【従来の技術】ビデオ、フロッピー、ハードディスク等
の磁気ヘッドは、磁性材料からなる一対のコア材を、ガ
ラスで融着して一体化して形成している。2. Description of the Related Art A magnetic head for a video, floppy disk, hard disk or the like is formed by melting a pair of core materials made of a magnetic material with glass and integrating them.
【０００３】磁気ヘッド用の磁性材料の融着に用いるガ
ラスは、次に示すような特性を満足することができるも
のが好ましい。 1)水、高ｐＨ研磨液、有機溶剤等に侵されないように、
化学的耐久性に優れていること。 2)磁性材料、一般には特にフェライトとの反応性が少な
いこと。 3)ガラスが安定で、熱処理工程において、ガラス中に失
透物（結晶）の析出がないこと。The glass used for fusing the magnetic material for the magnetic head is preferably one that can satisfy the following characteristics. 1) Avoid being attacked by water, high pH polishing liquid, organic solvent, etc.
It has excellent chemical durability. 2) It has low reactivity with magnetic materials, generally ferrite. 3) The glass is stable, and devitrification substances (crystals) do not precipitate in the glass during the heat treatment process.
【０００４】近年、磁気記録の高密度化に伴ない、高保
磁力をもつ記録媒体が用いられるようになり、このよう
な媒体に記録を行うために、フェライトのギャップ近傍
に、センダスト等の金属磁性膜を形成したメタルインギ
ャップ構造のヘッドが使用されるようになってきた。こ
のようなヘッドは、金属磁性膜の磁気特性を損なわせる
ことがないように融着することが必要であり、そのため
には550 ℃以下の温度で融着することが好ましい。In recent years, recording media having a high coercive force have come to be used as the density of magnetic recording has increased, and in order to perform recording on such a medium, metal magnetism such as sendust is formed near the ferrite gap. Film-formed heads having a metal-in-gap structure have come into use. It is necessary to fuse such a head so as not to impair the magnetic properties of the metal magnetic film, and for that purpose, it is preferable to fuse at a temperature of 550 ° C. or lower.
【０００５】そのため、550 ℃以下の温度で融着するこ
とが可能な低温融着性ガラス組成物が種々研究され、特
開昭63-170240 号、特開平1-308844号等に開示されてい
る。これらは、PbO 、B2O3や、Na2O、 K2O 、Li2O等のア
ルカリ酸化物の含量を増やすことにより融着温度を低く
したものである。Therefore, various low-temperature fusible glass compositions which can be fused at a temperature of 550 ° C. or lower have been studied and disclosed in Japanese Patent Laid-Open Nos. 63-170240 and 1-308844. .. These are those in which the fusion temperature is lowered by increasing the contents of PbO, B 2 O 3 and alkali oxides such as Na 2 O, K 2 O and Li 2 O.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、融着温
度を低くするためにPbO や、B2O3や、アルカリ酸化物の
含量を増やした場合、前記 1) 〜 3) の特性の低下をま
ねく。特に、磁気ヘッドの製造工程においては、ガラス
融着させた後、水、高ｐＨ研磨液、有機溶剤を用いて研
磨を行う工程があるため、ガラスの化学的耐久性が劣化
した場合、ガラス部分が侵食されてヘッドの摺動部に段
差が生じたり、溶出析出物が付着してヘッドの機能を損
なわせたりするという問題があった。[Problems to be Solved by the Invention] However, when the contents of PbO, B 2 O 3 and alkali oxides are increased in order to lower the fusion temperature, the characteristics of 1) to 3) above are deteriorated. .. In particular, in the manufacturing process of the magnetic head, there is a step of polishing with water, a high-pH polishing liquid, and an organic solvent after the glass is fused, so that when the chemical durability of the glass deteriorates, the glass portion However, there is a problem in that a step is formed in the sliding portion of the head due to the erosion of the water, and the eluted precipitate adheres to impair the function of the head.
【０００７】本発明は上記問題点に鑑みてなされたもの
で、その目的は、550 ℃以下の温度で融着することが可
能であって、かつ、化学的耐久性に優れ、フェライトと
の反応性の少ない低温融着性ガラス組成物を提供するこ
とにある。すなわち、磁気ヘッド用の磁性材料の融着、
特に、表面にセンダスト等の金属磁性膜を形成したフェ
ライトヘッドの融着に用いることができ、水、高ｐＨ研
磨液、有機溶剤と接触した際にも、ガラス部分が侵食さ
れてヘッドの摺動部に段差が生じたり、溶出析出物が付
着してヘッドの機能を損なわせたりという問題のない低
温融着性ガラス組成物を提供することにある。The present invention has been made in view of the above problems, and an object thereof is to be capable of fusion bonding at a temperature of 550 ° C. or lower, excellent in chemical durability and capable of reacting with ferrite. An object is to provide a low-temperature fusible glass composition having low properties. That is, fusion of the magnetic material for the magnetic head,
In particular, it can be used for fusing a ferrite head having a metal magnetic film such as sendust formed on the surface, and even when it comes into contact with water, a high pH polishing liquid, or an organic solvent, the glass part is eroded and the head slides. It is an object of the present invention to provide a low-temperature fusible glass composition which does not have a problem that a step is formed in a portion or an elution precipitate adheres to impair the function of the head.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、本発明による低温融着性ガラス組成物は、モル％
で、PbO ：38〜62％、SiO2：15〜45％、B2O3：0 〜18
％、ZnO 及び／又はBaO ：0〜5 ％、Al2O3 ：0 〜8
％、Li2O、Na2O、 K2O から選ばれる一種又は二種以上：
0 〜6 ％、ZrO2及び／又はNb2O5 ：0.5 〜5 ％、ただし
ZrO2、Nb2O5 は単独で4％を超えない組成からなり、550
℃以下で溶融することが可能であることを特徴とす
る。In order to achieve the above object, the low temperature fusible glass composition according to the present invention has a mol% of
In, PbO: 38~62%, SiO 2 : 15~45%, B 2 O 3: 0 ~18
%, ZnO and / or BaO: 0~5%, Al 2 O 3: 0 ~8
%, One or more selected from Li 2 O, Na 2 O and K 2 O:
0 to 6%, ZrO 2 and / or Nb 2 O 5 : 0.5 to 5%,
ZrO 2 and Nb 2 O 5 alone have a composition not exceeding 4%, and
It is characterized in that it can be melted at a temperature of not more than ° C.
【０００９】以下、本発明について更に詳細に説明す
る。The present invention will be described in more detail below.
【００１０】本発明において、PbO の含量が38％に満た
ない場合は、ガラスの融着温度が上昇し、550 ℃以下で
の融着が困難となり、62％を超える場合には、ガラス化
が不安定となり、失透物を析出しやすく、硬度も著しく
低下する。また、SiO2が15％に満たない場合は、ガラス
化が不十分となり、45％を超える場合は、550 ℃以下で
の融着が困難となる。更に、B2O3が18％を超える場合に
は化学的耐久性の劣化が著しく、ZnO 及び／又はBaO が
5 ％を超える場合には、ガラスの透明度に悪影響を及ぼ
すため好ましくない。そして、Al2O3 が8 ％を超える
と、550 ℃以下での融着が困難となり、Li2O、Na2O、 K2
O から選ばれる一種又は二種以上が6 ％を超えると、化
学的耐久性の劣化が著しく、好ましくない。ZrO2とNb2O
5 との合計含有量が0.5 ％に満たない場合は化学的耐久
性向上の効果がなく、5％を超える場合には、ガラスが
不安定となって、失透する。In the present invention, when the PbO content is less than 38%, the glass fusing temperature rises, making it difficult to fuse at 550 ° C. or below, and when it exceeds 62%, vitrification occurs. Instability, devitrification is likely to occur, and hardness is significantly reduced. Further, if SiO 2 is less than 15%, vitrification becomes insufficient, and if it exceeds 45%, fusion at 550 ° C or lower becomes difficult. Furthermore, when the B 2 O 3 content exceeds 18%, the chemical durability deteriorates significantly, and ZnO and / or BaO
If it exceeds 5%, the transparency of the glass is adversely affected, which is not preferable. When Al 2 O 3 exceeds 8%, fusion at 550 ° C or lower becomes difficult, and Li 2 O, Na 2 O and K 2
If one or more selected from O 2 exceeds 6%, the chemical durability is significantly deteriorated, which is not preferable. ZrO 2 and Nb 2 O
If the total content of 5 and 5 is less than 0.5%, there is no effect of improving chemical durability, and if it exceeds 5%, the glass becomes unstable and devitrifies.
【００１１】本発明において、上記組成は、モル％で、
PbO ：38〜58％、SiO2：27〜44％、B2O3：４〜10％、Zn
O 及び／又はBaO ：０〜３％、Al2O3 ：１〜４％、Li
2O、Na2O、 K2O から選ばれる一種又は二種以上：０〜４
％、ZrO2及び／又は Nb2O5：１〜３％であることが更に
好ましい。以下の説明において、％と記す場合は、モル
％を表すものとする。In the present invention, the above composition is in mol%,
PbO: 38~58%, SiO 2: 27~44%, B 2 O 3: 4~10%, Zn
O and / or BaO: 0~3%, Al 2 O 3: 1~4%, Li
One or more selected from 2 O, Na 2 O and K 2 O: 0 to 4
%, ZrO 2 and / or Nb 2 O 5 : 1-3% is more preferable. In the following description, “%” means “mol%”.
【００１２】なお、本発明の低温融着性ガラス組成物に
は、本発明の効果を妨げない範囲で、上記以外の成分、
例えばBi2O3、 Fe2O3、 MnO 等を配合することもできる。The low-temperature fusible glass composition of the present invention contains components other than those described above within a range that does not impair the effects of the present invention.
For example, Bi 2 O 3, Fe 2 O 3, MnO and the like can be blended.
【００１３】以上の組成からなる本発明の低温融着性ガ
ラス組成物は、550℃以下で溶融することが可能であ
り、かつ、化学的耐久性、すなわち、水、高ｐＨ研磨
液、有機溶剤と接触した際の耐久性に優れ、フェライト
との反応性が少ない。したがって、このガラス組成物
を、例えば、所定の形状、大きさのガラスロッド又は角
棒に成形することにより、磁気ヘッド用の磁性材料の融
着、特にセンダスト等の金属磁性膜を形成したメタルイ
ンギャップ構造の磁気ヘッド用の磁性材料の融着に用い
ることができる。The low-temperature fusible glass composition of the present invention having the above composition is capable of melting at 550 ° C. or lower and has chemical durability, that is, water, a high pH polishing liquid, an organic solvent. Has excellent durability when contacted with and has low reactivity with ferrite. Therefore, for example, by molding this glass composition into a glass rod or a square rod having a predetermined shape and size, fusion of a magnetic material for a magnetic head, particularly a metal in which a metal magnetic film such as sendust is formed. It can be used for fusing a magnetic material for a magnetic head having a gap structure.
【００１４】[0014]
【作用】ガラス組成において、PbO や、B2O3や、Li2O、
Na2O、 K2O 等のアルカリ酸化物の配合量を増やせば、ガ
ラスの融点が低くなることは、一般的に知られている。
しかし、そのようにして融点を低くすると、磁気ヘッド
用の磁性材料の融着に用いた場合、前記 1) 〜 3) の特
性の低下をまねく。すなわち、磁性材料をガラスで融着
させた後、水、高ｐＨ研磨液、有機溶剤などを用いて研
磨処理する工程において、ガラス部分が侵食されてヘッ
ドの摺動部に段差が生じたり、溶出物が析出して付着
し、ヘッドの機能を損なわせたりするという問題が生じ
る。[Function] In the glass composition, PbO, B 2 O 3 , Li 2 O,
It is generally known that the melting point of glass decreases as the content of alkali oxides such as Na 2 O and K 2 O increases.
However, if the melting point is lowered in such a manner, when it is used for fusing a magnetic material for a magnetic head, the characteristics of the above 1) to 3) are deteriorated. That is, in the step of polishing the magnetic material with glass and then using water, a high-pH polishing liquid, an organic solvent, etc., the glass portion is eroded to cause a step in the sliding portion of the head, and elution There arises a problem that a substance is deposited and adheres, impairing the function of the head.
【００１５】しかし、本発明のガラス組成物は、ZrO2及
び／又はNb2O5 を含有することにより、化学的耐久性が
向上し、水、高ｐＨ研磨液、有機溶剤などによる侵食が
防止される。また、磁性材料であるフェライトとの反応
性も少なくなり、フェライトと反応して磁気ヘッドの特
性が低下することも防止できる。したがって、550 ℃以
下で溶融することが可能で、かつ、化学的耐久性に優れ
たガラス組成物とすることができ、特に、センダスト等
の金属磁性膜を形成したメタルインギャップ構造の磁気
ヘッド用の磁性材料の融着に好適なものとなる。However, since the glass composition of the present invention contains ZrO 2 and / or Nb 2 O 5 , its chemical durability is improved and corrosion by water, high pH polishing liquid, organic solvent, etc. is prevented. To be done. Further, the reactivity with ferrite, which is a magnetic material, is reduced, and it is possible to prevent the characteristics of the magnetic head from being deteriorated by reacting with ferrite. Therefore, a glass composition that can be melted at 550 ° C. or less and that has excellent chemical durability can be obtained. Particularly, for a magnetic head having a metal-in-gap structure formed with a metal magnetic film such as sendust It is suitable for fusing the magnetic material.
【００１６】[0016]
実施例１〜５ PbO 、SiO2、B2O3、ZnO 、BaO 、Al2O3 、Li2O、Na2O、
K2O 、ZrO2、Nb2O5 を、表１に示す組成となるように配
合し、白金ルツボ中で、1000〜1200℃で、１時間溶解さ
せた後、鉄板上に流し出してガラスブロックを得た。Example 1~5 PbO, SiO 2, B 2 O 3, ZnO, BaO, Al 2 O 3, Li 2 O, Na 2 O,
K 2 O, ZrO 2 , and Nb 2 O 5 were blended so as to have the composition shown in Table 1, melted in a platinum crucible at 1000 to 1200 ° C. for 1 hour, and then poured on an iron plate to form a glass. Got the block.
【００１７】比較例 なお、比較のため、ZrO2、Nb2O5 は配合しないで、PbO
、SiO2、B2O3、Al2O3を低温融着性ガラス組成物となる
ように配合し、実施例と同様にしてガラスブロックを製
造した。Comparative Example For comparison, PrO 2 and Nb 2 O 5 were not mixed, and PbO 2
, SiO 2 , B 2 O 3 , and Al 2 O 3 were mixed so as to form a low-temperature fusible glass composition, and a glass block was manufactured in the same manner as in the example.
【００１８】こうして得られた実施例１〜５、及び比較
例のガラスブロックについて、それらの転移点、軟化
点、シール温度、膨張係数、耐水性、耐アルカリ性、フ
ェライトとの反応性を測定した。The glass blocks of Examples 1 to 5 and Comparative Example thus obtained were measured for their transition point, softening point, sealing temperature, expansion coefficient, water resistance, alkali resistance, and reactivity with ferrite.
【００１９】上記において、転移点、軟化点、シール温
度は、示差熱分析法（ＤＴＡ法）により測定し、熱膨張
係数は、示差膨張計により、30℃〜転移点までの平均膨
張係数を10-7／℃を単位として求めた。また、耐水性
は、95℃の蒸留水中に１時間浸漬した後の、１cm2 あた
りの重量減で表わし、耐アルカリ性は、50℃の５％NaOH
水溶液中に１時間浸漬した後の、１cm2 あたりの重量減
で表わした。In the above, the transition point, the softening point and the seal temperature are measured by a differential thermal analysis method (DTA method), and the thermal expansion coefficient is measured by a differential expansion meter, and the average expansion coefficient from 30 ° C. to the transition point is 10 It was calculated in units of -7 / ° C. Water resistance is expressed by weight loss per 1 cm 2 after immersion in distilled water at 95 ° C for 1 hour. Alkali resistance is 5% NaOH at 50 ° C.
The weight loss per 1 cm 2 after immersion in the aqueous solution for 1 hour was expressed.
【００２０】更に、フェライトとの反応性は、フェライ
ト上に、３×３×10mm程度に切り出したガラスブロック
を置き、N2雰囲気の電気炉中で、ガラスを融着させる温
度に20分間保持した後、炉中で、室温まで冷却し、次い
で、ガラスフェライトの断面を研磨仕上し、ガラスとフ
ェライトとの境界を、500 倍の顕微鏡で観察した。そし
て、フェライト面に、ガラスとの反応による凹凸が発生
しているものを×とし、凹凸が観察されないものを○と
判定した。これらの結果を表１に示す。Further, regarding the reactivity with ferrite, a glass block cut out to a size of 3 × 3 × 10 mm was placed on the ferrite, and the glass block was kept at a temperature for fusing the glass for 20 minutes in an electric furnace in an N 2 atmosphere. After that, it was cooled to room temperature in a furnace, then the cross section of the glass ferrite was polished and finished, and the boundary between the glass and the ferrite was observed with a microscope of 500 times. Then, the one in which irregularities were generated on the ferrite surface due to the reaction with glass was rated as x, and the one in which no irregularities were observed was rated as o. The results are shown in Table 1.
【００２１】[0021]
【表１】 [Table 1]
【００２２】表１の結果から、ZrO2及び／又はNb2O5 を
配合した実施例１〜５のガラスは、これらと同程度の転
移点、軟化点、シール温度、熱膨張係数を有するが、Zr
O2、Nb2O5を配合しない比較例のガラスと比べて、耐水
性、耐アルカリ性、フェライトとの反応性が著しく改善
されていることがわかる。From the results shown in Table 1, the glasses of Examples 1 to 5 containing ZrO 2 and / or Nb 2 O 5 have the same transition point, softening point, sealing temperature and coefficient of thermal expansion as those described above. , Zr
It can be seen that the water resistance, alkali resistance, and reactivity with ferrite are remarkably improved as compared with the glass of the comparative example in which O 2 and Nb 2 O 5 are not mixed.
【００２３】[0023]
【発明の効果】以上説明したように、本発明のガラス組
成物は、550 ℃以下で溶融することが可能であり、か
つ、化学的耐久性に優れ、フェライトとの反応性が少な
い。したがって、このガラス組成物を、所定の大きさの
ガラスロッド又は角棒に成形することにより、センダス
ト等の金属磁性膜を形成したメタルインギャップ構造の
磁気ヘッド用の磁性材料の融着に特に有効に用いること
ができる。As described above, the glass composition of the present invention can be melted at 550 ° C. or lower, has excellent chemical durability, and has low reactivity with ferrite. Therefore, by molding this glass composition into a glass rod or a square rod of a predetermined size, it is particularly effective in fusing a magnetic material for a magnetic head having a metal-in-gap structure in which a metal magnetic film such as sendust is formed. Can be used for.
Claims (2)
％、B2O3：0 〜18％、ZnO 及び／又はBaO ：0 〜5 ％、
Al2O3 ：0 〜8 ％、Li2O、Na2O、 K2O から選ばれる一種
又は二種以上：0 〜6 ％、ZrO2及び／又はNb2O5 ：0.5
〜5 ％、ただしZrO2、Nb2O5は単独で4 ％を超えない組
成からなり、550 ℃以下で溶融することが可能であるこ
とを特徴とする低温融着性ガラス組成物。1. PbO: 38-62%, SiO 2 : 15-45 in mol%.
%, B 2 O 3 : 0 to 18%, ZnO and / or BaO: 0 to 5%,
Al 2 O 3 : 0 to 8%, one or more selected from Li 2 O, Na 2 O and K 2 O: 0 to 6%, ZrO 2 and / or Nb 2 O 5 : 0.5
A low-temperature fusible glass composition, characterized in that the composition is up to 5%, but ZrO 2 and Nb 2 O 5 alone do not exceed 4% and can be melted at 550 ° C. or lower.
求項１記載の低温融着性ガラス組成物。2. The low-temperature fusing glass composition according to claim 1, which is used for fusing a magnetic material for a magnetic head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30255191A JP3190961B2 (en) | 1991-10-22 | 1991-10-22 | Low temperature fusing glass composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30255191A JP3190961B2 (en) | 1991-10-22 | 1991-10-22 | Low temperature fusing glass composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05105479A true JPH05105479A (en) | 1993-04-27 |
| JP3190961B2 JP3190961B2 (en) | 2001-07-23 |
Family
ID=17910336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30255191A Expired - Fee Related JP3190961B2 (en) | 1991-10-22 | 1991-10-22 | Low temperature fusing glass composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3190961B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276150A (en) * | 2011-06-02 | 2011-12-14 | 重庆仪表材料研究所 | High-temperature and high-pressure resistant glass material for sealing and preparation method thereof |
-
1991
- 1991-10-22 JP JP30255191A patent/JP3190961B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276150A (en) * | 2011-06-02 | 2011-12-14 | 重庆仪表材料研究所 | High-temperature and high-pressure resistant glass material for sealing and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3190961B2 (en) | 2001-07-23 |
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