為了釐清Ba2YRu(1-x)CuxO6的超導來自於何，使用兩種方法來加以探討：一種為助熔劑長晶法(PbO+PbF2)在自製長晶爐中，溫度1120℃~1100℃，以每小時降溫0.2~0.5℃成長Ba2YRu(1-x)CuxO6（x=0,0.1）晶體；另一種為固相反應法，將粉末壓成直徑12mm的圓形薄片，以箱型爐，在溫度約1460~1485℃，在空氣中持溫兩小時所燒結成塊材。晶體與塊材皆做結構分析、磁性分析、與形態分析、定量分析，塊材部分還有作R-T電性分析、與TEM成份分析等。
結果發現晶體並非單晶。晶體的表面用SEM作mapping，有銅元素存在處的釕元素特別少，還有氧化鉛的析出。由EDS量測到某些點只含有釔、鋇、銅、氧等元素。表面磨開後，可看出晶體內部為Ba3YRu2O9，外層為Ba2YRuO6，且有部分含白金與銅的物質析出。由磁性量測可知超導可能來自表面。
塊材方面則發現所有有超導樣品，皆有YBa2Cu3O7(Y123)的雜相。且此雜相的繞射峰值相對強度與磁性量測場冷所計算的單位體積所含有的超導成分有密切的正相關。較高的溫度與持溫一段時間燒結皆有利於氧化釔與Y123的形成，但銅的摻雜量(x≦0.3)重覆的燒結會使Y123與氧化釔雜相變小，而使超導訊號變小。銅的摻雜量(x≧0.4)含有的Y2BaCuO5(Y211)越多，重覆的燒結，可使Y211充分反應生成氧化釔或Y123，使超導訊號變大。

In order to classify the superconducting phase within Ba2YRu1-xCuxO6 (BaY2116) system, both BaY2116 crystals and bulks have been prepared and investigated. Crystals were grown in a homemade furnace with PbO+PbF2 flux, that is a high temperature solution growth technique, and bulks were prepared by a typical solid state reaction Crystals were grown from 1120℃ to 1100℃ by a cooling rate 0.2℃~0.5℃ per hour, where bulks were sintered in air at 1460℃~1485℃ for 2 hours. XRD, SQUID, SEM/EDS and EPMA were performed on these two kinds of samples. Bulks were further examined by R-T and TEM to obtain more information about electrical properties and nanostructure.

The EDS mapping of the crystal surface showed that Cu and Ru can not coexist in the same region, and it also contained PbO precipitation. Some region only had Y, Ba, Cu, and O. Inside the crystal, the Ba3YRu2O9 was surrounded by Ba2YRuO6 and accompanied with Pt and Cu precipitations. The diamagnetic signal was eliminated after polishing the surface. All these results showed that crystals were actually polycrystalline samples, and the superconducting phase was only exist on the surface.

For bulks an unwanted YBa2Cu3O7 (Y123) phase can be detected in all superconducting samples. The diamagnetic intensity per unit volume was proportional to the relative XRD peak intensity. For lower Cu doped bulks (x<0.3) sintered in a higher temperature or for a longer duration would lead more Y2O3 or Y123, but repeat sintering would reduced these undesired phases. On the contrary, more sintering times would cause more Y123 or Y2O3 phase for those higher doped bulks.

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