金属ナフテン酸塩及びアセチルアセトナートの塗布熱分解によるBa_2YCu_3O_<7-δ>超伝導薄膜の合成

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Thin films of superconductor Ba_2YCu_3O_<7-δ> (BYCO) were prepared on the yttria-stabilized zirconia substrates by the dip- ping-pyrolysis process using metal naphthenates and acetylacetonates as starting materials. Barium, yttrium and copper naphthenates and acetylacetonates, with molar ratios of (A) Ba : Y : Cu = 2 : 1 : 3 and (B) 3 : 1 ; 4. 3, were dissolved in toluene and a mixture of pyridine and propionic acid, respectively, to make homogeneous solutions. After dipping, drying and preheating at 500℃ were repeated 10-20 times, final heat treatment at 950°-970℃ in O_2 gave 5-10 μm thick BYCO films, which showed superconduction at T_<c,zero> of 89-91 K. Results of scanning electron microscopy and X- ray diffraction analysis showed dense textures of orthorhombic BYCO grains.
社団法人日本セラミックス協会の論文
1989-04-01