skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Synthesis, structure and electrical properties of Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12} and the CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} pseudoternary phase diagram

Abstract

Subsolidus phase relations in the CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} system were determined at 935 deg. C. The phase diagram contains one new phase, Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12} (CTNO) and one rutile-structured solid solution series, Ti{sub 1-3x}Cu{sub x}Nb{sub 2x}O{sub 2}: 0<x<0.2335 (35). The crystal structure of CTNO is similar to that of CaCu{sub 3}Ti{sub 4}O{sub 12} (CCTO) with square planar Cu{sup 2+} but with A site vacancies and a disordered mixture of Cu{sup +}, Ti{sup 4+} and Nb{sup 5+} on the octahedral sites. It is a modest semiconductor with relative permittivity {approx}63 and displays non-Arrhenius conductivity behavior that is essentially temperature-independent at the lowest temperatures. - Graphical abstract: The CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} phase diagram was determined at 935 deg. C and contains one new phase, Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12}, pictured, a modest semiconductor with {epsilon}{sub r}{approx}63, and one rutile-structured solid solution series, Ti{sub 1-3x}Cu{sub x}Nb{sub 2x}O{sub 2}. Highlights: > Subsolidus phase relations in the CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} system were determined at 935 deg. C. > A new phase, Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12} (CTNO), was found with a CaCu{sub 3}Ti{sub 4}O{sub 12}-like crystal structure. > We discovered one rutile-structured solid solution series, Ti{sub 1-3x}Cu{submore » x}Nb{sub 2x}O{sub 2}: 0<x<0.2335 (35). > CTNO has square planar Cu{sup 2+}, A site vacancies and Cu{sup +}, Ti{sup 4+} and Nb{sup 5+} disordered on octahedral sites. > CTNO is a modest semiconductor with relative permittivity {approx}63.« less

Authors:
 [1]; ; ; ;  [1]
  1. Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD (United Kingdom)
Publication Date:
OSTI Identifier:
21580150
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 184; Journal Issue: 7; Other Information: DOI: 10.1016/j.jssc.2011.05.032; PII: S0022-4596(11)00281-7; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COPPER IONS; NIOBATES; NIOBIUM IONS; NIOBIUM OXIDES; PERMITTIVITY; PEROVSKITE; PHASE DIAGRAMS; RUTILE; SEMICONDUCTOR MATERIALS; SOLID SOLUTIONS; SYNTHESIS; TITANIUM IONS; TITANIUM OXIDES; CHALCOGENIDES; CHARGED PARTICLES; DIAGRAMS; DIELECTRIC PROPERTIES; DISPERSIONS; ELECTRICAL PROPERTIES; HOMOGENEOUS MIXTURES; INFORMATION; IONS; MATERIALS; MINERALS; MIXTURES; NIOBIUM COMPOUNDS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PEROVSKITES; PHYSICAL PROPERTIES; RADIOACTIVE MATERIALS; RADIOACTIVE MINERALS; REFRACTORY METAL COMPOUNDS; SOLUTIONS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Citation Formats

Reeves-McLaren, Nik, E-mail: n.reeves@sheffield.ac.uk, Ferrarelli, Matthew C., Tung, Yuan-Wei, Sinclair, Derek C., and West, Anthony R. Synthesis, structure and electrical properties of Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12} and the CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} pseudoternary phase diagram. United States: N. p., 2011. Web. doi:10.1016/j.jssc.2011.05.032.
Reeves-McLaren, Nik, E-mail: n.reeves@sheffield.ac.uk, Ferrarelli, Matthew C., Tung, Yuan-Wei, Sinclair, Derek C., & West, Anthony R. Synthesis, structure and electrical properties of Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12} and the CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} pseudoternary phase diagram. United States. doi:10.1016/j.jssc.2011.05.032.
Reeves-McLaren, Nik, E-mail: n.reeves@sheffield.ac.uk, Ferrarelli, Matthew C., Tung, Yuan-Wei, Sinclair, Derek C., and West, Anthony R. Fri . "Synthesis, structure and electrical properties of Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12} and the CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} pseudoternary phase diagram". United States. doi:10.1016/j.jssc.2011.05.032.
@article{osti_21580150,
title = {Synthesis, structure and electrical properties of Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12} and the CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} pseudoternary phase diagram},
author = {Reeves-McLaren, Nik, E-mail: n.reeves@sheffield.ac.uk and Ferrarelli, Matthew C. and Tung, Yuan-Wei and Sinclair, Derek C. and West, Anthony R.},
abstractNote = {Subsolidus phase relations in the CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} system were determined at 935 deg. C. The phase diagram contains one new phase, Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12} (CTNO) and one rutile-structured solid solution series, Ti{sub 1-3x}Cu{sub x}Nb{sub 2x}O{sub 2}: 0<x<0.2335 (35). The crystal structure of CTNO is similar to that of CaCu{sub 3}Ti{sub 4}O{sub 12} (CCTO) with square planar Cu{sup 2+} but with A site vacancies and a disordered mixture of Cu{sup +}, Ti{sup 4+} and Nb{sup 5+} on the octahedral sites. It is a modest semiconductor with relative permittivity {approx}63 and displays non-Arrhenius conductivity behavior that is essentially temperature-independent at the lowest temperatures. - Graphical abstract: The CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} phase diagram was determined at 935 deg. C and contains one new phase, Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12}, pictured, a modest semiconductor with {epsilon}{sub r}{approx}63, and one rutile-structured solid solution series, Ti{sub 1-3x}Cu{sub x}Nb{sub 2x}O{sub 2}. Highlights: > Subsolidus phase relations in the CuO{sub x}-TiO{sub 2}-Nb{sub 2}O{sub 5} system were determined at 935 deg. C. > A new phase, Cu{sub 3.21}Ti{sub 1.16}Nb{sub 2.63}O{sub 12} (CTNO), was found with a CaCu{sub 3}Ti{sub 4}O{sub 12}-like crystal structure. > We discovered one rutile-structured solid solution series, Ti{sub 1-3x}Cu{sub x}Nb{sub 2x}O{sub 2}: 0<x<0.2335 (35). > CTNO has square planar Cu{sup 2+}, A site vacancies and Cu{sup +}, Ti{sup 4+} and Nb{sup 5+} disordered on octahedral sites. > CTNO is a modest semiconductor with relative permittivity {approx}63.},
doi = {10.1016/j.jssc.2011.05.032},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 7,
volume = 184,
place = {United States},
year = {2011},
month = {7}
}