TY - GEN
T1 - Calorimetric studies of the stability of perovskites relevant to electroceramics
AU - Navrotsky, Alexandra
PY - 2012
Y1 - 2012
N2 - The electrical, magnetic, optical, and transport properties of perovskites are controlled by their structure, which is in turn a consequence of atomic scale interactions that are reflected in their thermodynamic properties. High temperature oxide melt solution calorimetry is a versatile tool for determining such energetics. After an overview of the general thermodynamic factors determining perovskite stability, this contribution concentrates on the thermodynamics of three important systems. The first is BaTiO 3-SrTiO3-CaTiO3, where new enthalpy data help separate the effects of cation size and lattice distortion. The second is strontium-doped lanthanum ferrite-manganite (LSFO-LSMO), where defect chemistry, transition metal oxidation state, and magnetism all play important roles. The third is lead magnesium niobate - lead titanate (PMNPT), where short range order, symmetry changes, and competition of other phases (e.g. pyrochlore) are important considerations.
AB - The electrical, magnetic, optical, and transport properties of perovskites are controlled by their structure, which is in turn a consequence of atomic scale interactions that are reflected in their thermodynamic properties. High temperature oxide melt solution calorimetry is a versatile tool for determining such energetics. After an overview of the general thermodynamic factors determining perovskite stability, this contribution concentrates on the thermodynamics of three important systems. The first is BaTiO 3-SrTiO3-CaTiO3, where new enthalpy data help separate the effects of cation size and lattice distortion. The second is strontium-doped lanthanum ferrite-manganite (LSFO-LSMO), where defect chemistry, transition metal oxidation state, and magnetism all play important roles. The third is lead magnesium niobate - lead titanate (PMNPT), where short range order, symmetry changes, and competition of other phases (e.g. pyrochlore) are important considerations.
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U2 - 10.1149/1.3701288
DO - 10.1149/1.3701288
M3 - Conference contribution
AN - SCOPUS:84869035728
SN - 9781566779531
T3 - ECS Transactions
SP - 11
EP - 17
BT - Ionic and Mixed Conducting Ceramics 8
PB - Electrochemical Society Inc.
T2 - Ionic and Mixed Conducting Ceramics 8 - 221st ECS Meeting
Y2 - 6 May 2012 through 10 May 2012
ER -