JPS61178439A - Glass for bonding ferrite - Google Patents
Glass for bonding ferriteInfo
- Publication number
- JPS61178439A JPS61178439A JP1585585A JP1585585A JPS61178439A JP S61178439 A JPS61178439 A JP S61178439A JP 1585585 A JP1585585 A JP 1585585A JP 1585585 A JP1585585 A JP 1585585A JP S61178439 A JPS61178439 A JP S61178439A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- ferrite
- weight
- bonding
- zro2
- 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
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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気ヘッドの製造において、フェライト磁心
同士の接着及び空隙部の充填に用いるガラスに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a glass used for bonding ferrite cores together and filling voids in manufacturing magnetic heads.
従来のフェライト接着用ガラスは、 ５ｉＱｚ、ＰｂＯ
，Ｋ２Ｏ、ＮａｚＯ１Ｂ２０３等を主成分とするも°
のでＰｂＯあるいはアルカリ金属酸化物を多量に含有
することで、低融点化がはかられていた。Conventional ferrite bonding glass is 5iQz, PbO
, K2O, NazO1B203, etc. as the main components.
Therefore, by containing a large amount of PbO or an alkali metal oxide, the melting point was lowered.
しかし、前述の従来のフェライト接着用ガラスを用いる
場合、以下に述べるような問題点が生じていた。即ち、
高温下での接着時におけるガラスと７エ２イトの反応に
よシフエライト部が侵食され、あるいはガラス成分がフ
ェライト中に拡散するととＫよシ磁気的有効空隙幅が正
確に規定できないこと、フェライト接着体の加工中ある
いは磁気ヘッドと磁気媒体等との摺動時に充填部のガラ
スが摩耗してへこむこと、充填されたガラス中に気泡が
生じること等の問題点が生じていた。そこで本発明はこ
のような問題点を解決するもので、その目的とするとこ
ろは、磁気的有効空隙幅が正確に規定され、ガラス部の
へこみや気泡のない磁気ヘッドを提供することにある。However, when using the above-mentioned conventional ferrite bonding glass, the following problems have occurred. That is,
If the siferite part is eroded due to the reaction between the glass and 7E2ite during bonding at high temperatures, or if the glass component diffuses into the ferrite, the magnetically effective gap width cannot be accurately defined, and ferrite bonding may occur. Problems have arisen, such as the glass in the filling portion being worn and dented during processing of the body or sliding between the magnetic head and the magnetic medium, and the formation of bubbles in the filled glass. SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and it is an object of the present invention to provide a magnetic head in which the effective magnetic gap width is accurately defined and there are no dents or bubbles in the glass portion.
本発明のフェライト接着用ガラスは、５ｉｏｚ１７〜２
４重量％、ＢＩＬ０５０〜５６重量％、Ｂ２０３２２〜
３２重量％、Ｚｒ０ｚα５〜２重量％、ＺｎＯα５〜１
重量Ｔｏ 、Ｋ２Ｏ０〜１重量％の組成範囲を有するこ
とを特徴とする。The glass for ferrite adhesion of the present invention has 5ioz17-2
4% by weight, BIL050~56% by weight, B20322~
32% by weight, Zr0zα5-2% by weight, ZnOα5-1
It is characterized by having a weight To and a composition range of 0 to 1% by weight of K2O.
下表に示す組成のガラスを作成し、第１図のごとく加工
したフェライトブロックを対向させ、高第１表
温にてガラスを溶融、空隙部に注入させることＫより接
着を行った。第１表には、比較例として本発明の組成範
囲外のガラスについても記載した。Glass having the composition shown in the table below was prepared, ferrite blocks processed as shown in FIG. 1 were placed facing each other, and the glass was melted at a high first surface temperature and bonded by injecting it into the void. Table 1 also lists glasses outside the composition range of the present invention as comparative examples.
本実施例で使用したフェライトは、マンガン−亜鉛フェ
ライトで、その熱膨張率は１０５ｘ１０ ’１℃である
。第１表の１〜４のガラスを使用してフェライトの接着
を行ったところ、いずれの場合にも、フェライト−ガラ
ス界面での７エライトの侵食はほとんど無く、又、磁気
ヘッドとしての最終仕上研摩後のガラス部分のへこみ深
さは１０３μｍ以下で、同ガラス面の平均気泡数は１０
１個であった。The ferrite used in this example is manganese-zinc ferrite, and its coefficient of thermal expansion is 105x10'1°C. When ferrite was bonded using glasses 1 to 4 in Table 1, in all cases, there was almost no erosion of 7-erite at the ferrite-glass interface, and the final polishing required for the magnetic head The depth of the dent in the rear glass part is less than 103 μm, and the average number of bubbles on the same glass surface is 10.
There was one.
上述のへこみ深さや気泡数は問題とならない量である。The depth of the dent and the number of bubbles mentioned above are not a problem.
比較例５のガラスを使用して接着した場合は、接着中に
ガラスが失透し、これがために接着強度が低下し後の工
程で７工ラ°イト接着体が破壊され、比較例６のガラス
の場合も同様に失透した。When the glass of Comparative Example 5 was used for bonding, the glass devitrified during bonding, which caused the adhesive strength to decrease and the 7-layer light bonded body to be destroyed in the subsequent process, resulting in the failure of Comparative Example 6. In the case of glass, devitrification occurred similarly.
本発明のガラスの組成範囲において、ＳｉＯ２の含有量
ｆｃ１６〜２４重量％と限定したのは、１６重量−以下
では、耐摩耗性、耐湿性等の劣化が見られ、又２４重量
−以上では接着温度が７５０℃を超えてしまい７工ライ
ト部の侵食が激しくなるからである。ＢａＯの含有量を
５０〜５６重量％と限定したのは、この範囲外では、ガ
ラスの製造時又は、フェライトの接着時に失透し易くな
るからで、この範囲内ではガラスは安定的でちゃ、フェ
ライト部の侵食が少なく、接着強度の高いヘッドコアが
得られる。Ｂ２Ｏ３の含有量を２２〜３２重量％と限定
したのは、２２重量−以下では、接着温度が７５０℃を
超えてしまうからで、又、３２重量−以上では失透し易
くなるからである。ｚｒＯ２の含有量を（Ｌ５〜２．５
重量％と限定したのは、α５重量％以下では、充分なガ
ラスの耐久性が得られず、又、２．５′Ｎ量チ以上では
、接着温度が７５０℃を超えてしまうからである。Ｚｎ
Ｏを少量添加するのは、フェライトの侵食を抑える効果
があるからで、１５重量％°以下ではその効果が小さく
、又、１重量−以上では、接着時に失透し易くなる。In the composition range of the glass of the present invention, the SiO2 content fc is limited to 16 to 24% by weight, because below 16% by weight, deterioration of abrasion resistance, moisture resistance, etc. is observed, and above 24% by weight, adhesion is observed. This is because if the temperature exceeds 750°C, the erosion of the 7th grade light section will become severe. The reason why the BaO content is limited to 50 to 56% by weight is that outside this range, glass tends to devitrify during manufacturing or ferrite bonding; within this range, glass is not stable. A head core with low corrosion of the ferrite portion and high adhesive strength can be obtained. The reason why the content of B2O3 is limited to 22 to 32% by weight is because if the content is less than 22% by weight, the bonding temperature will exceed 750°C, and if it is more than 32% by weight, devitrification tends to occur. The content of zrO2 (L5 ~ 2.5
The reason why it is limited to % by weight is because if α is less than 5% by weight, sufficient durability of the glass cannot be obtained, and if the amount is more than 2.5'N, the bonding temperature will exceed 750°C. Zn
The reason why a small amount of O is added is that it has the effect of suppressing the corrosion of ferrite, and if it is less than 15% by weight, the effect is small, and if it is more than 1% by weight, devitrification tends to occur during bonding.
Ｋ２Ｏを０〜１重量％添加するのは、これが、接着温度
を低下させるからである。アルカリ金属線、本来フェラ
イトの侵食を促進するが、この程度の添加景では、この
効果は無視し得る。The reason for adding 0-1% by weight of K2O is that it lowers the bonding temperature. Alkali metal wires originally promote the erosion of ferrite, but with this level of addition, this effect can be ignored.
逆に、接着温度が低下した分だけ、ガラスとフェライト
の反応の度合が弱められ、あるいは、さらに、ガラスの
耐久性を向上させ、その反面、接着温度を上昇させてし
まうような５ｔｏ２やＺｒ０ｚ等の含有量を増加させる
ことができる。しかしＫ ｘ Ｏの含有量としては１重
責−以上では、ガラスが失透し易くなるので、上述の組
成範囲が望ましい。Conversely, the degree of reaction between the glass and ferrite is weakened by the amount that the bonding temperature is lowered, or 5to2, Zr0z, etc., which improve the durability of the glass but on the other hand, increase the bonding temperature. The content of can be increased. However, if the content of K x O is 1 or more, the glass tends to devitrify, so the above composition range is desirable.
以上述べ九ように本発明によるガラスを用いれば、磁気
的有効空隙幅が正確に規定され、空隙部に充填されたガ
ラスの磁気媒体との対向面にへこみや気泡のない磁気ヘ
ッドが得ら゛れる。As described above, by using the glass according to the present invention, the magnetic effective gap width can be accurately defined, and a magnetic head without dents or bubbles can be obtained on the surface of the glass filled in the gap that faces the magnetic medium. It will be done.
第１図は、接着されるべく対向配置された一組のフェラ
イト加工物を示す斜視図。
１・・・・・・フェライト加工物
２・・・・・・接着用男ラス
以上FIG. 1 is a perspective view showing a pair of ferrite workpieces placed opposite each other to be bonded. 1... Ferrite processed product 2... More than male lath for adhesion
Claims (1)
、Ｂ＿２Ｏ＿３２２〜３２重量％、ＺｒＯ＿２０．５〜
２．５重量％、ＺｎＯ０．５〜１重量％、Ｋ＿２Ｏ０〜
１重量％の組成範囲を有することを特徴とするフェライ
ト接着用ガラス。SiO_216-24% by weight, BaO50-56% by weight
, B_2O_322~32% by weight, ZrO_20.5~
2.5% by weight, ZnO0.5~1% by weight, K_2O0~
A ferrite adhesive glass characterized by having a composition range of 1% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1585585A JPS61178439A (en) | 1985-01-30 | 1985-01-30 | Glass for bonding ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1585585A JPS61178439A (en) | 1985-01-30 | 1985-01-30 | Glass for bonding ferrite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61178439A true JPS61178439A (en) | 1986-08-11 |
Family
ID=11900418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1585585A Pending JPS61178439A (en) | 1985-01-30 | 1985-01-30 | Glass for bonding ferrite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61178439A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7088439B2 (en) | 2000-12-28 | 2006-08-08 | Yasufumi Fukuma | Lens meter |
-
1985
- 1985-01-30 JP JP1585585A patent/JPS61178439A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7088439B2 (en) | 2000-12-28 | 2006-08-08 | Yasufumi Fukuma | Lens meter |
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