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    • 54. 发明授权
    • Magnetic head having a slider made of a glass-ceramic
    • 具有由玻璃陶瓷制成的滑块的磁头
    • US06201663B1
    • 2001-03-13
    • US09265039
    • 1999-03-09
    • Katsuhiko YamaguchiNaoyuki Goto
    • Katsuhiko YamaguchiNaoyuki Goto
    • C11B560
    • C03C19/00C03C10/0009C03C23/007
    • A magnetic head has a slider made of a glass-ceramic substrate which has, as its predominant crystal phase, a mixed crystal of lithium disilicate (Li2O.2SiO2) and either or both of &agr;-quartz (&agr;-SiO2) and &agr;-cristobalite (&agr;-SiO2), the &agr;-quartz has a globular grain structure each globular crystal grain being made of aggregated particles and having a grain diameter within a range from 0.1 &mgr;m to 3.0 &mgr;m, the &agr;-cristobalite has a globular grain structure each globular grain having a grain diamter within a range from 0.1 &mgr;m to 1.0 &mgr;m, and surface roughness (Ra) of the glass-ceramic substrate after polishing is within a range from 5 Å to 50 Å.
    • 磁头具有由玻璃 - 陶瓷衬底制成的滑块,其具有作为其主要结晶相的二硅酸锂(Li 2 O.2SiO 2 )的混合晶体, 和α-石英(α-SiO 2 )和α-方英石(α-SiO 2 )中的任一种或两者,α-石英具有球状晶粒结构,每个球状 晶粒由凝集粒子制成,粒径在0.1μm〜3.0μm的范围内,所述α-方英石具有球状晶粒结构,每个球状晶粒的晶粒直径在0.1μm〜1.0μm的范围内,表面 研磨后的玻璃陶瓷基板的粗糙度(Ra)在5〜50的范围内。
    • 56. 发明授权
    • Imide-modified polyester resin and wire enamel containing the
imide-modified polyester resin
    • 含有酰亚胺改性聚酯树脂的酰亚胺改性聚酯树脂和线搪瓷
    • US3975330A
    • 1976-08-17
    • US569436
    • 1975-04-18
    • Yasuhiro SuzukiKatsuhiko Yamaguchi
    • Yasuhiro SuzukiKatsuhiko Yamaguchi
    • C08G73/00C08G73/10C08G73/16C09D5/25C09D179/08H01B3/30
    • C08G73/16H01B3/306
    • An imide-ring containing polyester comprising the reaction product of(A) (1) a dicarboxylic acid of the formula ##EQU1## wherein R.sub.1 represents a divalent organic group, R.sub.2 represents a trivalent organic group, and n.gtoreq.1, the dicarboxylic acid of the formula (I) comprising the reaction product of 1 mole of an imide compound having terminal amino groups of the formula (II) ##EQU2## wherein R.sub.1 has the same meaning as above, or of an imide precursor thereof, with 2 moles of a tricarboxylic acid anhydride of the formula (III) ##EQU3## wherein R.sub.2 has the same meaning as above, the imide compound of the formula (II) being prepared by reacting n moles of 1,2,3,4-butanetetracarboxylic acid (hereinafter referred to as BTC) with (n+1) moles of a diamine of the formula (IV)h.sub.2 n--r.sub.1 --nh.sub.2 (iv)wherein R.sub.1 has the same meaning as above; or (A) (2) a mixture of the dicarboxylic acid of the formula (I) with at least one other polycarboxylic acid (including the lower alkyl ester thereof) with(B) at least one polyhydric alcohol; and a wire enamel containing the imide ring containing polyester described above.
    • 一种含酰亚胺的聚酯,其包含(A)(1)的反应产物:式COCO-CH-CH-CO HOOC-R2角度N-R1-N ANGLE || ANGLE N)n-1 COCO-CH 2 CH 2 -CO(I)CO-CH-CH-COCO R1-N角度||角度N-R1-N角度R2-COOH CO-CH2CH2-COCO其中R1表示二价有机基团,R2表示三价有机物 (II)的末端氨基的酰亚胺化合物CO-CH-CH-COH 2 N-R 1的反应产物的式(I)的二羧酸,n = -N ANGLE || ANGLE N)n-1R1- CO-CH 2 CH 2 -CO(II)CO-CH-CH-CO-AN-AN || ANGLE N-R1-NH2 CO-CH2CH2-CO其中R1具有与 或其酰亚胺前体与2摩尔式(III)CO HOOC-R2角度O(III)CO的三羧酸酐,其中R2具有与上述相同的含义,式(I)的酰亚胺化合物( II)通过使n摩尔的1,2,3,4-丁烷四羧酸(以下称为“ (n + 1)摩尔的式(Ⅳ)的二胺H 2 N-R 1 -NH 2(Ⅳ),其中R 1具有与上述相同的含义; 或(A)(2)式(I)的二羧酸与至少一种其它多元羧酸(包括其低级烷基酯)与(B)至少一种多元醇的混合物; 以及含有上述含有聚酰亚胺的线釉线。