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Electrical conduction behavior in (La0.9Sr0.1)MIIIO3−δ (MIII=Al, Ga, Sc, In, and Lu) perovskites

✍ Scribed by K Nomura; S Tanase

Book ID
104296658
Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
690 KB
Volume
98
Category
Article
ISSN
0167-2738

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✦ Synopsis

31 31 III III Oxide ion conduction in A B O -type perovskites, (La Sr )M O (M 5 Al, Ga, Sc, In, and Lu) has been 3 0.9 0.1 32d investigated as a function of crystallographic free volume (V ), taking the distortion from 'ideal' cubic structure into f 3 22 21

consideration. The Ga compound, whose V is ca. 13 A , showed the maximum conductivity of 8.1 3 10 S cm (at f 9808C, in N ) and the minimum activation energy of 0.60 eV (from 730-9808C, in N ) for oxide ion conduction. This 2 2

behavior arises from the balance between an increase in V and a decrease in symmetry in the perovskite structure.

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