Microstructure and thermoelectric properties of La 0.1 Dy 0.1 Sr x TiO 3 ceramics
Source abstract
Abstract
Abstract La 0.1 Dy 0.1 Sr x TiO 3 ( x =0.80, 0.78, 0.75, 0.70) powders were synthesized via a sol-gel method, followed by sintering at 1550 °C in a reducing atmosphere of 5 vol% hydrogen in nitrogen. The microstructure and thermoelectric properties of the Sr-deficient La and Dy co-doped SrTiO 3 were investigated. The result of XRD revealed that La 0.1 Dy 0.1 Sr x TiO 3 consisted of SrTiO 3 with a cubic crystal structure as the main phase and of a small amount of Dy 2 Ti 2 O 7 as the second phase. All the Sr-deficient samples exhibited a step-like microstructure. As the nominal Sr deficient content increased, the electrical conductivity of the Sr-deficient La 0.1 Dy 0.1 Sr x TiO 3 ceramics enhanced due to the increasing Sr and oxygen vacancies, the absolute value of the Seebeck coefficient increased a little, and the thermal conductivity decreased to ~3.0 W m −1 K −1 , leading to a high ZT value of 0.19 for La 0.1 Dy 0.1 Sr 0.75 TiO 3 at 500 °C.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal Expansion and Ionic Conductivity · Magnetic and transport properties of perovskites and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (21)
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