Thermal stability study of transition metal perovskite sulfides

Transition metal perovskite chalcogenides, a class of materials with rich tunability in functionalities, are gaining increased attention as candidate materials for renewable energy applications. Perovskite oxides are considered excellent n-type thermoelectric materials. Compared to oxide counterpart...

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Bibliographic Details
Published in:Journal of materials research 2018-12, Vol.33 (24), p.4135-4143
Main Authors: Niu, Shanyuan, Milam-Guerrero, JoAnna, Zhou, Yucheng, Ye, Kevin, Zhao, Boyang, Melot, Brent C., Ravichandran, Jayakanth
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Biomaterials
Chalcogenides
Cold
Differential scanning calorimetry
Heat conductivity
Heat treating
Heat treatment
High temperature
Inorganic Chemistry
Invited Paper
Iodine
Materials Engineering
Materials research
Materials Science
Materials selection
Nanotechnology
Organic chemistry
Oxidation
Perovskites
Phase transitions
Physical properties
Raman spectroscopy
Single crystals
Stability analysis
Studies
Sulfur
Thermal conductivity
Thermal stability
Thermodynamic properties
Thermoelectric materials
Thermogravimetric analysis
Transition metals
X-ray diffraction
X-ray spectroscopy
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Summary:Transition metal perovskite chalcogenides, a class of materials with rich tunability in functionalities, are gaining increased attention as candidate materials for renewable energy applications. Perovskite oxides are considered excellent n-type thermoelectric materials. Compared to oxide counterparts, we expect the chalcogenides to possess more favorable thermoelectric properties such as lower lattice thermal conductivity and smaller band gap, making them promising material candidates for high temperature thermoelectrics. Thus, it is necessary to study the thermal properties of these materials in detail, especially thermal stability, to evaluate their potential. In this work, we report the synthesis and thermal stability study of five compounds, α-SrZrS3, β-SrZrS3, BaZrS3, Ba2ZrS4, and Ba3Zr2S7. These materials cover several structural types including distorted perovskite, needle-like, and Ruddlesden–Popper phases. Differential scanning calorimeter and thermogravimetric analysis measurements were performed up to 1200 °C in air. Structural and chemical characterizations such as X-ray diffraction, Raman spectroscopy, and energy dispersive analytical X-ray spectroscopy were performed on all the samples before and after the heat treatment to understand the oxidation process. Our studies show that perovskite chalcogenides possess excellent thermal stability in air at least up to 550 °C.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2018.419