Synthesis, structure and electrical properties of Cu3.21Ti1.16Nb2.63O12 and the CuOx-TiO2-Nb2O5 pseudoternary phase diagram |
| |
Authors: | Nik Reeves-McLaren Matthew C Ferrarelli Yuan-Wei Tung Derek C Sinclair Anthony R West |
| |
Institution: | Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK |
| |
Abstract: | Subsolidus phase relations in the CuOx-TiO2-Nb2O5 system were determined at 935 °C. The phase diagram contains one new phase, Cu3.21Ti1.16Nb2.63O12 (CTNO) and one rutile-structured solid solution series, Ti1−3xCuxNb2xO2: 0<x<0.2335 (35). The crystal structure of CTNO is similar to that of CaCu3Ti4O12 (CCTO) with square planar Cu2+ but with A site vacancies and a disordered mixture of Cu+, Ti4+ and Nb5+ on the octahedral sites. It is a modest semiconductor with relative permittivity ∼63 and displays non-Arrhenius conductivity behavior that is essentially temperature-independent at the lowest temperatures. |
| |
Keywords: | Cu3 21Ti1 16Nb2 63O12 CCTO Perovskite Rutile Rietveld Impedance |
本文献已被 ScienceDirect 等数据库收录! |