JPH0761836A - Glass for adhering ferrite - Google Patents
Glass for adhering ferriteInfo
- Publication number
- JPH0761836A JPH0761836A JP5230898A JP23089893A JPH0761836A JP H0761836 A JPH0761836 A JP H0761836A JP 5230898 A JP5230898 A JP 5230898A JP 23089893 A JP23089893 A JP 23089893A JP H0761836 A JPH0761836 A JP H0761836A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- ferrite
- bonding
- water resistance
- sample
- 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
- 239000011521 glass Substances 0.000 title claims abstract description 38
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 36
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 238000010406 interfacial reaction Methods 0.000 abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 abstract 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- YEAUATLBSVJFOY-UHFFFAOYSA-N tetraantimony hexaoxide Chemical compound O1[Sb](O2)O[Sb]3O[Sb]1O[Sb]2O3 YEAUATLBSVJFOY-UHFFFAOYSA-N 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000843 powder 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
-
- 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
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
- C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
- C03C3/074—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron containing zinc
-
- 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
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/102—Glass compositions containing silica with 40% to 90% silica, by weight containing lead
- C03C3/108—Glass compositions containing silica with 40% to 90% silica, by weight containing lead containing boron
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
【０００１】[0001]
【産業上の利用分野】本発明はフェライト接着用ガラス
に関するものである。FIELD OF THE INVENTION The present invention relates to a glass for bonding ferrite.
【０００２】[0002]
【従来の技術】ビデオテープレコーダーやフロッピーデ
ィスクドライブ等に使用される磁気ヘッドは、図１に示
すように、フェライト等の磁性材料からなる一対のコア
１ａ、１ｂを、シリカガラス等のギャップ形成用ガラス
２を介して対向させ、接着用ガラス３ａ、３ｂで接着一
体化されている。2. Description of the Related Art As shown in FIG. 1, a magnetic head used in a video tape recorder, a floppy disk drive or the like has a pair of cores 1a and 1b made of a magnetic material such as ferrite for forming a gap such as silica glass. They are opposed to each other with the glass 2 in between, and are bonded and integrated with the bonding glasses 3a and 3b.
【０００３】このフェライト接着用ガラスには、７０
０〜８００℃程度で熱処理できること、熱膨張係数が
フェライトのそれ（８０〜１１０×１０-7／℃程度）に
適合するよう、６０〜１００×１０-7／℃であること、
図２（ａ）に示すような理論値通りのトラック幅Ａを
もつ磁気ヘッドを得るために、フェライトとの界面反応
が起こり難い（フェライトの侵食が少ない）こと、耐
水性、耐摩耗性等の耐久性に優れていること等の特性が
求められている。This ferrite bonding glass contains 70
Can be heat-treated at about 0 to 800 ° C., and has a thermal expansion coefficient of 60 to 100 × 10 −7 / ° C. to match that of ferrite (about 80 to 110 × 10 −7 / ° C.),
In order to obtain a magnetic head having a track width A as the theoretical value as shown in FIG. 2 (a), it is difficult to cause an interfacial reaction with ferrite (small erosion of ferrite), water resistance, wear resistance, etc. Properties such as excellent durability are required.
【０００４】このような接着用ガラスとして、従来より
種々のものが提案されており、例えば特開昭６３−３１
５５３３号には、ＳｉＯ2 −Ａｌ2 Ｏ3 −Ｂ2 Ｏ3 −Ｚ
ｎＯ−Ｒ2 Ｏ−ＰｂＯ系の接着用ガラスが開示されてい
る。Various types of such glass for bonding have been proposed in the past, for example, JP-A-63-31.
In No. 5533, SiO 2 -Al 2 O 3 -B 2 O 3 -Z
nO-R 2 O-PbO-based adhesive for glass is disclosed.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記し
たような従来の接着用ガラスにおいては、先記要求特性
の全てを満たすものはないのが現状である。However, under the present circumstances, none of the conventional glass for bonding described above satisfies all of the above-mentioned required characteristics.
【０００６】例えば上記特開昭６３−３１５５３３号に
開示の接着用ガラスは、フェライトと反応し易い。この
ためフェライトを侵食してしまい、特に小型のヘッドに
使用した場合、図２（ｂ）に示すように、理論値通りの
トラック幅より狭いトラック幅Ａ’になってしまうこと
がある。またフェライトとの界面反応により反応泡が発
生し易く、これが後の研磨等の加工工程で開口して凹部
となり、そのエッジ部分がテープ等の記録面を傷つけて
しまうおそれがある。それゆえ熱処理時に必要以上に温
度を上げてガラスの粘度を下げ、反応泡を取り除かなけ
ればならないという不都合がある。For example, the bonding glass disclosed in the above-mentioned Japanese Patent Laid-Open No. 63-315533 is easy to react with ferrite. For this reason, ferrite is eroded, and when it is used for a small head in particular, the track width A ′ may be narrower than the theoretical track width as shown in FIG. 2B. In addition, reaction bubbles are likely to be generated due to an interface reaction with ferrite, which may open and become recesses in a later processing step such as polishing, and edge portions thereof may damage a recording surface such as a tape. Therefore, there is a disadvantage in that the temperature must be raised more than necessary during the heat treatment to reduce the viscosity of the glass and the reaction bubbles must be removed.
【０００７】またこの接着用ガラスは、耐水性の改善を
目的としているものの、未だ不十分であり、ヘッドの製
造工程においてガラスの変質や変色が起こり易い。Although this glass for bonding is intended to improve the water resistance, it is still insufficient, and the glass is likely to be deteriorated or discolored in the head manufacturing process.
【０００８】本発明の目的は、先記した諸特性を満足
し、特にフェライトとの界面反応が非常に起こり難く、
且つ、耐水性のよいフェライト接着用ガラスを提供する
ことである。The object of the present invention is to satisfy the above-mentioned various characteristics, and especially the interfacial reaction with ferrite is very unlikely to occur,
Moreover, it is to provide a glass for bonding ferrite which has good water resistance.
【０００９】[0009]
【課題を解決するための手段】本発明者等は種々の実験
を行った結果、ＳｉＯ2 −Ａｌ2 Ｏ3 −Ｂ2 Ｏ3 −Ｚｎ
Ｏ−Ｒ2 Ｏ−ＰｂＯ系ガラスにおいて、Ｂ2 Ｏ3 の含有
量を１３％以下にすることによってフェライトとの反応
が防止できること、及びＲ2 ＯとしてＮａ2 Ｏの含有量
を４．５％以下に限定することによって耐水性が改善さ
れることを見いだし、本発明として提案するものであ
る。As a result of various experiments conducted by the present inventors, SiO 2 --Al 2 O 3 --B 2 O 3 --Zn
In O-R 2 O-PbO-based glass, that the content of B 2 O 3 can be prevented reaction between ferrite by below 13%, and as R 2 O content of Na 2 O 4.5% It has been found that the water resistance is improved by limiting to the following, and is proposed as the present invention.
【００１０】即ち、本発明のフェライト接着用ガラス
は、重量百分率でＳｉＯ2 ２０〜６４％、Ａｌ2 Ｏ3 ４
〜１６％、Ｂ2 Ｏ3 １〜１３％、ＺｎＯ ２〜８．４
％、Ｎａ2 Ｏ １〜４．５％、Ｋ2 Ｏ ０〜５％、Ｐｂ
Ｏ １０〜５０％、ＢａＯ ０〜９％、Ｆｅ2 Ｏ3 ０〜
５％、ＭｎＯ2 ０〜２％、Ｓｂ2 Ｏ3 ０〜１％からなる
ことを特徴とする。That is, the glass for bonding ferrite according to the present invention has a weight percentage of SiO 2 of 20 to 64% and Al 2 O 3 4.
˜16%, B 2 O 3 1 to 13%, ZnO 2 to 8.4
%, Na 2 O 1-4.5%, K 2 O 0-5%, Pb
O 10-50%, BaO 0-9%, Fe 2 O 3 0-
5%, MnO 2 0 to 2%, and Sb 2 O 3 0 to 1%.
【００１１】[0011]
【作用】本発明のフェライト接着用ガラスの組成範囲を
上記のように限定した理由を以下に述べる。The reason for limiting the composition range of the ferrite bonding glass of the present invention as described above will be described below.
【００１２】ＳｉＯ2 はガラス化範囲を広げる成分であ
り、その含有量は２０〜６４％、好ましくは２８〜５５
％である。ＳｉＯ2 が２０％より少ないとガラスの硬度
が低くなって実用的な耐摩耗性が得られなくなり、６４
％より多いと軟化点が高くなって８００℃以下で熱処理
できなくなる。SiO 2 is a component for expanding the vitrification range, and its content is 20 to 64%, preferably 28 to 55.
%. If the SiO 2 content is less than 20%, the hardness of the glass becomes low and practical wear resistance cannot be obtained.
%, The softening point becomes high and heat treatment cannot be performed at 800 ° C. or lower.
【００１３】Ａｌ2 Ｏ3 はガラスの耐水性、耐摩耗性
等、いわゆる耐久性を高める成分であり、その含有量は
４〜１６％、好ましくは５〜９％である。Ａｌ2 Ｏ3 が
４％より少ないとガラスの耐水性が悪くなり、１６％よ
り多いとガラスの軟化点が高くなって８００℃以下で熱
処理できなくなる。Al 2 O 3 is a component that enhances so-called durability such as water resistance and abrasion resistance of glass, and its content is 4 to 16%, preferably 5 to 9%. If Al 2 O 3 is less than 4%, the water resistance of the glass will be poor, and if it is more than 16%, the softening point of the glass will be high and heat treatment will not be possible at 800 ° C.
【００１４】Ｂ2 Ｏ3 はガラスを安定化させる成分であ
り、その含有量は１〜１３％、好ましくは２〜９％であ
る。Ｂ2 Ｏ3 が１％より少ないとガラスが不安定にな
る。一方１３％より多いとフェライトとの界面反応が起
こり易くなり、理論値通りのトラック幅が得られなくな
ったり、反応泡が生じてしまう。B 2 O 3 is a component that stabilizes the glass, and its content is 1 to 13%, preferably 2 to 9%. If B 2 O 3 is less than 1%, the glass becomes unstable. On the other hand, if it is more than 13%, the interfacial reaction with ferrite is likely to occur, the track width as the theoretical value cannot be obtained, and reaction bubbles are generated.
【００１５】ＺｎＯは高温域での粘性を下げ、反応泡を
除去し易くする働きがあり、その含有量は２〜８．４
％、好ましくは２〜８％である。ＺｎＯが２％より少な
いとその効果がなく、８．４％以上になるとガラスが失
透し易くなる。ZnO has the function of lowering the viscosity at high temperatures and facilitating the removal of reaction bubbles, and its content is 2-8.4.
%, Preferably 2-8%. If ZnO is less than 2%, the effect is not obtained, and if it is 8.4% or more, the glass tends to devitrify.
【００１６】Ｎａ2 Ｏは熱膨張係数を調整するために含
有される成分であり、その含有量は１〜４．５％、好ま
しくは２〜４．５％である。Ｎａ2 Ｏが１％より少ない
とフェライトに適合した熱膨張係数が得らない。一方
４．５％より多いと耐水性等の耐久性が極端に悪くなっ
てしまう。Na 2 O is a component contained for adjusting the thermal expansion coefficient, and its content is 1 to 4.5%, preferably 2 to 4.5%. If the content of Na 2 O is less than 1%, a thermal expansion coefficient suitable for ferrite cannot be obtained. On the other hand, if it is more than 4.5%, durability such as water resistance will be extremely deteriorated.
【００１７】Ｋ2 ＯはＮａ2 Ｏと同様に熱膨張係数を調
整するために添加される成分であり、その含有量は０〜
５％、好ましくは０〜３．５％である。Ｋ2 Ｏの含有量
が多すぎると耐久性が悪くなる。K 2 O, like Na 2 O, is a component added to adjust the coefficient of thermal expansion, and its content is 0 to.
It is 5%, preferably 0 to 3.5%. If the content of K 2 O is too large, the durability deteriorates.
【００１８】ＰｂＯはガラスの軟化点を調整する働きが
あり、その含有量は１０〜５０％、好ましくは２０〜４
６％である。ＰｂＯが１０％より少ないとガラスの軟化
点が十分に下がらないため熱処理温度が高くなり、一方
５０％より多いとフェライトとの界面反応が起こり易く
なる。PbO has a function of adjusting the softening point of glass, and its content is 10 to 50%, preferably 20 to 4
6%. If the PbO content is less than 10%, the softening point of the glass will not be sufficiently lowered, and the heat treatment temperature will be high, while if it is more than 50%, an interfacial reaction with ferrite tends to occur.
【００１９】ＢａＯは熱膨張係数を調整するために含有
される成分であり、その含有量は０〜９％、好ましくは
０〜８％である。ＢａＯが９％より多いと耐水性が悪く
なる。BaO is a component contained for adjusting the thermal expansion coefficient, and its content is 0 to 9%, preferably 0 to 8%. If BaO is more than 9%, the water resistance becomes poor.
【００２０】Ｆｅ2 Ｏ3 及びＭｎＯ2 はフェライトとの
濡れ性を改善する働きがあり、その含有量はそれぞれ０
〜５％及び０〜２％、好ましくは０〜４％及び０〜１％
である。Ｆｅ2 Ｏ3 及びＭｎＯ2 がそれぞれ多すぎると
ガラスが不安定になる。Fe 2 O 3 and MnO 2 have the function of improving the wettability with ferrite, and their contents are each 0
~ 5% and 0-2%, preferably 0-4% and 0-1%
Is. If the amounts of Fe 2 O 3 and MnO 2 are too large, the glass becomes unstable.
【００２１】Ｓｂ2 Ｏ3 は、ガラス原料の溶融時に発生
する泡を除去する目的で１％まで含有することができ
る。Sb 2 O 3 may be contained up to 1% for the purpose of removing bubbles generated when the glass raw material is melted.
【００２２】[0022]
【実施例】以下、本発明のフェライト接着用ガラスを実
施例に基づいて説明する。EXAMPLES The glass for bonding ferrite according to the present invention will be described below based on examples.
【００２３】表１は本発明の実施例（試料Ｎｏ．１〜
４）及び比較例（試料Ｎｏ．５、６）を示している。Table 1 shows examples of the present invention (Sample Nos. 1 to 1).
4) and comparative examples (Sample Nos. 5 and 6) are shown.
【００２４】[0024]
【表１】 [Table 1]
【００２５】各試料は次のようにして調製した。まず、
表中の組成になるようにガラス原料を調合し、１３００
〜１４００℃で１時間溶融した。次いでこの溶融ガラス
を所定の形状に成形加工し、試料とした。Each sample was prepared as follows. First,
Glass raw materials were mixed so as to have the composition shown in the table, and 1300
Melted at ˜1400 ° C. for 1 hour. Next, this molten glass was molded into a predetermined shape and used as a sample.
【００２６】表１から明らかなように、本発明の実施例
である試料Ｎｏ．１〜４は、転移点が４５０〜４７０
℃、軟化点が６００〜６４０℃、熱処理温度が７５０〜
７９０℃、熱膨張係数が６５〜９７×１０-7／℃であ
り、また各試料ともフェライトの侵食は認められず、し
かも耐水性に優れていた。これに対して比較例である試
料Ｎｏ．５は、転移点が４４０℃、軟化点が６００℃、
熱処理温度が７５０℃、熱膨張係数が７５×１０-7／℃
と実施例とほぼ同等の値を示し、またフェライトの侵食
も認められなかったが、耐水性が悪かった。一方試料Ｎ
ｏ．６は、転移点が４１０℃、軟化点が５５０℃、熱処
理温度が７００℃、熱膨張係数が１００×１０-7／℃と
実施例とほぼ同等の値を示し、また耐水性も良好であっ
た。しかしながらフェライトの侵食が認められた。As is apparent from Table 1, the sample No. which is an example of the present invention. 1-4, the transition point is 450-470
℃, softening point 600 ~ 640 ℃, heat treatment temperature 750 ~
The sample had a thermal expansion coefficient of 790 ° C. and a coefficient of thermal expansion of 65 to 97 × 10 −7 / ° C. Further, no corrosion of ferrite was observed in each sample, and the sample had excellent water resistance. On the other hand, sample No. which is a comparative example. 5 has a transition point of 440 ° C., a softening point of 600 ° C.,
Heat treatment temperature is 750 ℃, thermal expansion coefficient is 75 × 10 -7 / ℃
The value was almost the same as that of the example and the ferrite was not corroded, but the water resistance was poor. On the other hand, sample N
o. No. 6 has a transition point of 410 ° C., a softening point of 550 ° C., a heat treatment temperature of 700 ° C., and a thermal expansion coefficient of 100 × 10 −7 / ° C., which are almost the same values as those of the examples and have good water resistance. It was However, ferrite erosion was observed.
【００２７】なお転移点及び軟化点は、目開き１０５μ
ｍの篩を通過するガラス粉末を試料として用い、示差熱
分析計にて測定した。熱膨張係数は５φ×２０ｍｍの大
きさに成形した棒状の試料を用い、示差膨張計にて測定
した熱膨張曲線より算出した。フェライトの侵食性につ
いては次のようにして測定した。まず５×５×５ｍｍの
大きさに成形された試料を、表面が光沢研磨された１０
×１０×３ｍｍの大きさの多結晶フェライト上に置き、
Ｎ2 雰囲気中で表に示す熱処理温度で６０分間焼成し
た。その後、光学顕微鏡（１００倍）を用い、ガラスを
通してフェライトの侵食状態を観察し、フェライト表面
に変化が見られなかったものを○、侵食によりフェライ
トの結晶粒界が認められたものを×とした。また耐水性
は、１０×２５×５ｍｍの大きさに成形した試料の表面
を光沢研磨し、９８℃以上の蒸留水中で２時間煮沸した
後、取り出した試料の表面を目視で観察し、変色が認め
られなかったものを○、認められたものを×とした。The transition point and the softening point are 105 μm in mesh size.
The glass powder passing through a sieve of m was used as a sample, and measured with a differential thermal analyzer. The thermal expansion coefficient was calculated from the thermal expansion curve measured by a differential expansion meter using a rod-shaped sample molded into a size of 5φ × 20 mm. The erosiveness of ferrite was measured as follows. First, a sample molded into a size of 5 × 5 × 5 mm was polished to give a gloss-polished surface 10
Place on a polycrystalline ferrite of size × 10 × 3 mm,
Firing was performed for 60 minutes at the heat treatment temperature shown in the table in an N 2 atmosphere. Then, using an optical microscope (100 times), the erosion state of the ferrite was observed through the glass, and those showing no change on the ferrite surface were marked with ◯, and those showing the ferrite grain boundary due to erosion were marked with x. . As for the water resistance, the surface of the sample molded to a size of 10 × 25 × 5 mm was subjected to gloss polishing, boiled in distilled water at 98 ° C. or higher for 2 hours, and then the surface of the sample taken out was visually observed to confirm that the discoloration did not occur. Those that were not recognized were marked with ◯, and those that were recognized were marked with x.
【００２８】[0028]
【発明の効果】本発明のフェライト接着用ガラスは、フ
ェライトとの界面反応が起こり難く、フェライトの侵食
が殆どないため、小型の磁気ヘッドに使用しても理論値
通りのトラック幅をもったヘッドを作製することが可能
である。しかも耐水性が良好であり、フェライト接着用
として好適である。The ferrite bonding glass of the present invention hardly causes an interfacial reaction with the ferrite and hardly corrodes the ferrite. Therefore, even if it is used for a small magnetic head, the head has a track width as the theoretical value. Can be produced. Moreover, it has good water resistance and is suitable for ferrite bonding.
【図１】磁気ヘッドの斜視図である。FIG. 1 is a perspective view of a magnetic head.
【図２】（ａ）は理論値通りのトラック幅を持った磁気
ヘッドの平面図であり、（ｂ）はフェライトが接着用ガ
ラスによって侵食され、トラック幅が狭小化した磁気ヘ
ッドの平面図である。FIG. 2A is a plan view of a magnetic head having a track width that is a theoretical value, and FIG. 2B is a plan view of a magnetic head in which ferrite is eroded by an adhesive glass and the track width is narrowed. is there.
１ａ、１ｂ コア ２ ギャップ形成用ガラス ３ａ、３ｂ 接着用ガラス Ａ、Ａ’ トラック幅 1a, 1b Core 2 Gap forming glass 3a, 3b Adhesive glass A, A'Track width
Claims (1)
ｌ2 Ｏ3 ４〜１６％、Ｂ2 Ｏ3 １〜１３％、ＺｎＯ ２
〜８．４％、Ｎａ2 Ｏ １〜４．５％、Ｋ2Ｏ ０〜５
％、ＰｂＯ １０〜５０％、ＢａＯ ０〜９％、Ｆｅ2
Ｏ3 ０〜５％、ＭｎＯ2 ０〜２％、Ｓｂ2 Ｏ3 ０〜１％
からなることを特徴とするフェライト接着用ガラス。1. SiO 2 20-64% by weight percentage, A
1 2 O 3 4-16%, B 2 O 3 1-13%, ZnO 2
~8.4%, Na 2 O 1~4.5% , K 2 O 0~5
%, PbO 10-50%, BaO 0-9%, Fe 2
O 3 0-5%, MnO 2 0-2%, Sb 2 O 3 0-1%
A glass for bonding ferrite, which is made of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5230898A JPH0761836A (en) | 1993-08-23 | 1993-08-23 | Glass for adhering ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5230898A JPH0761836A (en) | 1993-08-23 | 1993-08-23 | Glass for adhering ferrite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0761836A true JPH0761836A (en) | 1995-03-07 |
Family
ID=16915032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5230898A Pending JPH0761836A (en) | 1993-08-23 | 1993-08-23 | Glass for adhering ferrite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0761836A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000014022A1 (en) * | 1998-09-04 | 2000-03-16 | Nippon Electric Glass Co., Ltd. | CRT BULB GLASS CONTAINING PbO AND Fe2O¿3? |
| DE19958522A1 (en) * | 1999-12-04 | 2001-06-21 | Schott Glas | Optical glasses containing zinc |
| JP2020512253A (en) * | 2016-11-22 | 2020-04-23 | コーニング インコーポレイテッド | Glass articles and laminates for automobiles and buildings |
-
1993
- 1993-08-23 JP JP5230898A patent/JPH0761836A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000014022A1 (en) * | 1998-09-04 | 2000-03-16 | Nippon Electric Glass Co., Ltd. | CRT BULB GLASS CONTAINING PbO AND Fe2O¿3? |
| US6437501B1 (en) | 1998-09-04 | 2002-08-20 | Nippon Electric Glass Co., Ltd. | CRT bulb glass containing PbO and Fe2O3 |
| DE19958522A1 (en) * | 1999-12-04 | 2001-06-21 | Schott Glas | Optical glasses containing zinc |
| DE19958522B4 (en) * | 1999-12-04 | 2004-04-08 | Schott Glas | Optical glasses containing zinc |
| US6806216B2 (en) | 1999-12-04 | 2004-10-19 | Schott Glas | Zinc-containing optical glass materials |
| US7074732B2 (en) | 1999-12-04 | 2006-07-11 | Schott Glas | Zinc-containing optical glass materials |
| JP2020512253A (en) * | 2016-11-22 | 2020-04-23 | コーニング インコーポレイテッド | Glass articles and laminates for automobiles and buildings |
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