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    • 8. 发明公开
    • Process for fabricating superconducting ceramics materials
    • Verfahren zur Herstellung supraleitender keramischer Materialien。
    • EP0305949A1
    • 1989-03-08
    • EP88114052.9
    • 1988-08-29
    • MITSUBISHI MATERIALS CORPORATION
    • Takeshita, TakuoHagino, Sadaaki
    • C04B35/00H01L39/24C04B35/60
    • H01L39/248C04B35/4504
    • A process for fabricating worked superconducting ceramics material composed essentially of a yttrium-including rare earth element, an alkaline earth metal, copper and balance oxygen and unavoidable impurities, and optionally containing a metal originating from an oxygen supply agent, comprising:

      (a) providing starting powder composed of:

      (i) a member selected from the group consisting of:
      (1) a mixt powder composed of powders of component oxides:
      (1-1) a yttrium-including rare earth element oxide,
      (1-2) an alkaline earth metal oxide, and
      (1-3) copper oxide,
      and having a composition substantially the same as that of a contemplated superconducting ceramics,
      (2) a mixt powder composed of powders of:
      (2-1) a partial compound between any two of the com­ponent oxides constituting a contemplated super­conductive ceramics secelected from (1-1), (1-2) and (1-3), and
      (2-2) the rest of the component oxides selected from (1-1), (1-2) and (1-3),
      and having a composition substantially the same as that of a contemplated superconducting ceramics,
      (3) powder of a superconducting ceramics composed essen­tially of a yttrium-including rare earth element, an alkaline earth metal, copper and balance oxygen and unavoidable impurities,
      (4) a mixt powder composed of at least two members selected from the mixt powders (1), (2) and (3); and
      (ii) optionally an oxygen-supply agent;

      (b) placing the starting powder in a metal casing, and sealing the metal casing;
      (c) optionally heat-treating the starting powder in the metal casing when the starting powder is the mixt powder (i)-(1), (ii)-(2) or (iii)-(4) at a temperature sufficient for calcining the starting powder;
      (d) working the metal casing containing the starting powder optionally heat-treated according to the step (c) above into an article having a predetermined form; and
      (e) optionally heat-treating the article at a temperature of from 300 °C to 950 °C.
    • 一种用于制造基本上由包含钇的稀土元素,碱土金属,铜和余量的氧和不可避免的杂质组成的工作超导陶瓷材料的方法,以及任选地含有源自供氧剂的金属的方法,包括:(a)提供 起始粉末:(i)选自以下的成员:(1)由组分氧化物粉末组成的混合粉末:(1-1)含钇的稀土元素氧化物,(1-2) 碱土金属氧化物和(1-3)氧化铜,并且具有与预期的超导陶瓷基本相同的组成,(2)由以下粉末组成的混合粉末:(2-1)任何 从(1-1),(1-2)和(1-3)中选择构成预期的超导陶瓷的两种组分氧化物,和(2-2)选自(1-1), (1-2)和(1-3),并且其组成基本相同 的预期超导陶瓷,(3)基本上由含钇的稀土元素,碱土金属,铜和余量的氧和不可避免的杂质构成的超导陶瓷的粉末,(4)由至少两个构件组成的混合粉末 选自混合粉末(1),(2)和(3); 和(ii)任选的供氧剂; (b)将起始粉末放置在金属外壳中,并密封金属外壳; (c)当起始粉末是混合粉末(i) - (1),(ii) - (2)或(iii) - (4)时,任选地在金属外壳中热处理起始粉末,温度足以 煅烧起始粉末; (d)将含有根据上述步骤(c)任选热处理的起始粉末的金属外壳加工成具有预定形式的制品; 和(e)任选地在300℃至950℃的温度下热处理该制品