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Variability of the Sr/Ti Ratio in SrTiO 3
Author(s) -
WITEK S.,
SMYTH D. M.,
PICLUP H.
Publication year - 1984
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1984.tb19540.x
Subject(s) - solubility , sintering , electrical resistivity and conductivity , solid solution , materials science , solid solubility , conductivity , phase (matter) , analytical chemistry (journal) , oxygen , mineralogy , inorganic chemistry , chemistry , metallurgy , organic chemistry , chromatography , electrical engineering , engineering
TiO 2 is observed as a second phase in SrTiO 3 having Sr/Ti ≤ 0.995 (≥0.5 mol% excess TiO 2 ). The effect of excess TiO 2 on the equilibrium electrical conductivity at 1000°C is consistent with a solubility of <0.1 mol% TiO 2 with the formation of unassociated oxygen vacancies. More Ti0 2 is retained in solid solution when samples are quenched from the sintering temperature rather than furnace‐cooled. The effect of excess SrO on the equilibrium electrical conductivity also indicates some solid solubility.