Investigation of proton conduction in La1-xBa1+xGaO4-x/2 and La1-xSr2+xGaO5-x/2

F Schonberger, E Kendrick, MS Islam, PR Slater

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24 Citations (Scopus)


In this paper we report an investigation of proton conduction in two gallate systems, La1−xBa1+xGaO4−x/2 and La1−xSr2+xGaO5−x/2, containing tetrahedral Ga. Measurements in dry atmospheres show that both systems exhibit a p-type contribution to the conductivity, while a comparison between dry and wet atmospheres shows evidence for proton conduction. The La1−xBa1+xGaO4−x/2 system shows the highest proton conductivities, with conductivities reported being significantly higher (≈ 1 × 10− 4 S cm− 1 at 500 °C for x = 0.2) than those for other structures containing tetrahedral ions, e.g. LaPO4. Replacement of La by Pr in this system leads to an increase in the electronic contribution to the conductivity.
Original languageEnglish
Pages (from-to)2951-2953
JournalSolid State Ionics
Issue number39-40
Publication statusPublished - 2005


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