In:
Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 557-559 ( 2012-7), p. 1223-1227
Abstract:
A novel series of ceramic samples La 2 Mo 2-x Ti x O 9-δ (x = 0, 0.025, 0.05, 0.075) were prepared by solid-state reaction method. Their structures and phase transitions were studied by XRD, DSC and CTE. Their Electrical conductivities and oxygen ion transport numbers were measured by AC impedance spectroscopy at 773~1073 K and EMF at 673~1073 K, respectively. Results showed that even when x=0.075, the sample was almost pure oxygen ion conductor under the oxygen partial pressure gradient of 1.0 atm/0.21 atm, and though all the Ti-doped samples still underwent α/β structure transition, no abrupt change in the electrical conductivity was observed accompanying with the transition. They exhibited considerably higher electrical conductivity than La 2 Mo 2 O 9 , especially at 773~873 K and the conductivity increased with increasing x value. The value of conductivity for La 2 Mo 1.925 Ti 0.075 O 9-δ reached 8.5×10 -3 S•cm -1 at 773 K and 0.08 S•cm -1 at 1,073 K.
Type of Medium:
Online Resource
ISSN:
1662-8985
DOI:
10.4028/www.scientific.net/AMR.557-559
DOI:
10.4028/www.scientific.net/AMR.557-559.1223
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2012
detail.hit.zdb_id:
2265002-7
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