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Preparation of tape of silver covered Bi-Pb-Ca-Sr-Cu-O oriented polycrystal superconductor
Preparation of tape of silver covered Bi-Pb-Ca-Sr-Cu-O oriented polycrystal superconductor
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机译:银包覆Bi-Pb-Ca-Sr-Cu-O取向多晶超导带的制备
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摘要
A silver tube with one open end is packed with a particulate mixture of reactants comprised of Bi₂CaSr₂Cu₂O8±x, Ca₂CuO₃, cupric oxide and lead oxide, the open end of the packed tube is plugged with silver, the resulting closed tube is swaged to increase the density of the packed mixture, the swaged tube is wire-drawn, uniaxial pressure is applied to the wire orienting the Bi₂CaSr₂Cu₂O8±x crystals with their c-axis parallel to each other forming an initial tape, the initial tape is fired to convert part of the Bi₂CaSr₂Cu₂O8±x crystals to Bi2-yPbyCa₂Sr₂Cu₃O10±z crystals producing an intermediate tape containing dilated product, uniaxial pressure is applied to the resulting intermediate tape to remove the dilation in the product, and the pressed intermediate tape is fired to produce a tape comprised of silver enveloping a sintered body of Bi2-yPbyCa₂Sr₂Cu₃O10±z.
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机译:一根开口端的银管中装有由Bi 2 CaSr 2 Cu 2 O 8±x Sub>,Ca 2 CuO 3,氧化铜和氧化铅组成的反应物的颗粒混合物,填充管的开口端用银塞住,锻造封闭的管以增加填充混合物的密度,对锻造的管进行拉丝,对导线施加单轴压力,使Bi 2 CaSr 2 Cu 2 O 8±x Sub>晶体取向,其c轴平行于彼此形成初始带,将初始带烧制以将部分Bi 2 CaSr 2 Cu 2 O 8±x Sub>晶体转化为Bi 2-y Sub> Pb y Sub> Ca 2 Sr 2 Cu 3 O 10±z Sub>晶体产生含有膨胀产物的中间带,对所得的中间带施加单轴压力以除去产物中的膨胀,并烧制压制的中间带以生产由银包裹了Bi 2-y Sub> Pb y Sub> Ca 2 Sr 2 Cu 3 O 10±z Sub>的烧结体。
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