Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (11): 1049-1052.doi: 10.3866/PKU.WHXB19991118

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Anodic Electrocrystallization of BaKPbO and BaKPbBiO from Molten Salt

Zhang Lin, Zhao Liang-Zhong, Zhang Jin-Biao, Xu Cui-Ying, Liu Shi-Hong   

  1. Institute of Chemistry,Chinese Academy of Science,Beijing 100080
  • Received:1999-01-25 Revised:1999-05-03 Published:1999-11-15
  • Contact: Zhang Lin

Abstract:

BaKPbO and BaKPbBiO single crystals were electrodeposited on anode by the molten salt electrochemical method using KOH/KNO3 as flux. It is found that the K content decreases when the KNO3 concentration in the flux increases. On the other hand, when the KNO3 concentration in the flux is constant, the K content increases as the Bi content in the BaKPbBiO crystals increases. The magnetic susecptibility measurements show that Ba-K-Pb-Bi-O crystals are superconducting while BaKPbO crystals are not. XPS analyses reveal that the M(M=Pb, Bi)6s-O2p valence band moves toward the Fermi level when the Bi content in BaKPbBiO decreases.

Key words: Complex oxides, Anodic electrocrystallization, Superconductivity, Electronic structure