A study of the BaTiO<sub>3</sub>-YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6+ delta </sub> ceramic composite system
Ang Chen; Yu Zhi; Yahua Bao; Xi Dai; Qin Jiang; Ang Chen; Dept. of Phys., Zhejiang Univ., Hangzhou, China; Yu Zhi; Dept. of Phys., Zhejiang Univ., Hangzhou, China; Yahua Bao; Dept. of Phys., Zhejiang Univ., Hangzhou, China; Xi Dai; Dept. of Phys., Zhejiang Univ., Hangzhou, China; Qin Jiang; Dept. of Phys., Zhejiang Univ., Hangzhou, China
Журнал:
Journal of Physics: Condensed Matter
Дата:
1994-05-09
Аннотация:
A class of ceramic composite prepared with two kinds of oxide ceramic, namely ferroelectric BaTiO<sub>3</sub> and superconducting YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6+ delta </sub>, is reported, and the phase structure and electrical transport properties of the samples are investigated. The results show that the main phases varied in different composition regions. For low nominal YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6+ delta </sub> contents, the conductive characteristics of the two-phase (BaTiO<sub>3</sub> and YBa<sub>3</sub>Ti<sub>2</sub>O<sub>8.5</sub>) composite follow the three-dimensional percolation model while, for high nominal YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6+ delta </sub> contents, superconductivity was observed.
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