| 摘要 |
The disclosed oxide has a general chemical formula of Ba-Pb1-x-Bix-Oz, x being 0.35 to 1 and z being 2.7 to 3, and the oxide shows a potential superconductivity at a temperature below 14K and a photoconductivity at a temperatures below 160K at least in an exciting wavelength range of 500 to 700 nm depending on the value of the above x. The oxide is made by heating a mixture of starting materials for the desired composition at 750-850 DEG C. for 2-10 hours so as to cause solid phase reaction in the mixture, cooling the heated materials gradually, shaping the cooled mixture under pressure, reheating the shaped materials at 500-850 DEG C. for 2-10 hours so as to effect secondary sintering thereon, keeping the reheated materials at 600-500 DEG C. for 2-3 hours and cooling the same either extremely quickly at a rate of 1500-900 DEG C./sec or slowly at a rate of 150-200 DEG C./hour.
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