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    • 9. 发明授权
    • Magnetic head
    • 磁头
    • US5245492A
    • 1993-09-14
    • US863610
    • 1992-04-06
    • Yasuo MizunoMasaki IkedaAkihiko Yoshida
    • Yasuo MizunoMasaki IkedaAkihiko Yoshida
    • C03C3/14C03C8/24
    • C03C8/24C03C3/142C03C8/245
    • A magnetic head comprising magnetic core halves which are sealed with a sealing glass which consists essentially of 1 to 75 wt. % of TeO.sub.2, 1 to 30 wt. % of B.sub.2 O.sub.3, 1 to 75 wt. % of PbO, 1 to 25 wt. % of CdO, 0 to 15 wt. % of ZnO, 0 to 25 wt. % of Bi.sub.2 O.sub.3, 0 to 5 wt. % of A.sub.2 O wherein A is an alkali metal, 0 to 35 wt. % of ARO wherein AR is an alkaline earth metal, 0 to 35 wt. % of La.sub.2 O.sub.3, 0 to 5 wt. % of at least one oxide selected from the group consisting of Al.sub.2 O.sub.3, SiO.sub.2, TiO.sub.2 and ZrO.sub.2, 0 to 10 wt. % of at least one oxide selected from the group consisting of Ta.sub.2 O.sub.5, Nb.sub.2 O.sub.5, WO.sub.3 and MoO.sub.3, 0 to 30 wt. % of PbF.sub.2, and 0 to 2 wt. % of CoO, has a coefficient of thermal expansion of from 82.times.10.sup.-7 /.degree.C. to 137.times.10.sup.-7 /.degree.C. in a temperature range between 30.degree. C. and 300.degree. C., a working temperature of from 430.degree. to 620.degree. C. and water resistance of the first class, which glass is not deeply colored and is not devitrified during the assembly of the magnetic head.
    • 一种磁头,包括用密封玻璃密封的磁芯半部,其基本上由1至75重量% %的TeO 2,1〜30wt。 %的B2O3,1〜75wt。 %的PbO,1〜25wt。 %的CdO,0〜15wt。 %的ZnO,0〜25wt。 %的Bi 2 O 3,0〜5wt。 %的A2O,其中A是碱金属,0〜35重量% ARO的%,其中AR是碱土金属,0-35重量% %的La 2 O 3,0〜5wt。 %的至少一种选自Al 2 O 3,SiO 2,TiO 2和ZrO 2的氧化物,0至10wt。 %的至少一种选自Ta2O5,Nb2O5,WO3和MoO3的氧化物,0〜30wt。 PbF 2的百分比,和0〜2wt。 %的CoO在30℃至300℃的温度范围内具有82×10 -7 /℃至137×10 -7 /℃的热膨胀系数,工作温度为430℃至 620℃,第一类的耐水性,该玻璃不会深色,并且在磁头的组装过程中不会失透。
    • 10. 发明授权
    • Magnetic head
    • 磁头
    • US5224001A
    • 1993-06-29
    • US863609
    • 1992-04-06
    • Yasuo MizunoMasaki IkedaAkihiko Yoshida
    • Yasuo MizunoMasaki IkedaAkihiko Yoshida
    • C03C3/072C03C8/24G11B5/133G11B5/193
    • G11B5/193C03C3/072C03C8/245G11B5/133
    • A magnetic head comprising magnetic core halves which are sealed with a sealing glass which consists essentially of 10 to 25% by weight of SiO.sub.2, 55 to 80% by weight of PbO, 1 to 15% by weight of CdO, 0 to 10% by weight of B.sub.2 O.sub.3, 0 to 5% by weight of ZnO, 0 to 5% by weight of Al.sub.2 O.sub.3, 0 to 5% by weight of Na.sub.2 O, and 0 to 10% by weight of K.sub.2 O, provided that a total content of Na.sub.2 O and K.sub.2 O does not exceed 10% by weight, has a coefficient of thermal expansion of from 90.times.10.sup.-7 /.degree. C. to 110.times.10.sup.-7 /.degree. C. in a temperature range between 30.degree. C. and 300.degree. C., a working temperature of 600.degree. C. or lower and water resistance of the second class or higher, which glass is not deeply colored and is not devitrified during the assembly of the magnetic head.
    • 一种磁头,其包括用密封玻璃密封的磁芯半部,所述密封玻璃基本上由10至25重量%的SiO 2,55至80重量%的PbO,1至15重量%的CdO,0至10重量% 重量比的B2O3,0-5%(重量)的ZnO,0-5%(重量)的Al2O3,0-5%(重量)的Na2O和0-10%(重量)的K2O,条件是Na2O和K2O的总含量 不超过10重量%,在30℃至300℃的温度范围内的热膨胀系数为90×10 -7 /℃至110×10 -7 /℃,工作温度为 600℃以下,第二等级以上的耐水性,该玻璃不会深色,并且在磁头的组装期间不会失透。