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Title: Spark Plasma Sintering (SPS)-Assisted Synthesis and Thermoelectric Characterization of Magnéli Phase V6O11

Abstract

The Magnéli phase V6O11 was synthesized in gram amounts from a powder mixture of V6O11/V7O13 and vanadium metal, using the spark plasma sintering (SPS) technique. Its structure was determined with synchrotron X-ray powder diffraction data from a phase-pure sample synthesized by conventional solid-state synthesis. A special feature of Magnéli-type oxides is a combination of crystallographic shear and intrinsic disorder that leads to relatively low lattice thermal conductivities. SPS prepared V6O11 has a relatively low thermal conductivity of κ = 2.72 ± 0.06 W (m K)–1 while being a n-type conductor with an electrical conductivity of σ = 0.039 ± 0.005 (μΩ m)–1, a Seebeck coefficient of α = –(35 ± 2) μV K–1, which leads to a power factor of PF = 4.9 ± 0.8 × 10–5W (m K2)–1 at ~600 K. Advances in the application of Magnéli phases are mostly hindered by synthetic and processing challenges, especially when metastable and nanostructured materials such as V6O11 are involved. Here, this study gives insight into the complications of SPS-assisted synthesis of complex oxide materials, provides new information about the thermal and electrical properties of vanadium oxides at high temperatures, and supports the concept of reducing the thermal conductivity of materials withmore » structural building blocks such as crystallographic shear (CS) planes.« less

Authors:
 [1];  [1];  [2];  [3];  [1];  [4]; ORCiD logo [1];  [5];  [1]; ORCiD logo [3]; ORCiD logo [1]
  1. Johannes Gutenberg-Univ., Mainz (Germany)
  2. Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
  3. Justus-Liebig-Univ. Gießen, (Germany)
  4. King Abdullah Univ. of Science and Technology, Thuwal (Saudi Arabia)
  5. Max Planck Inst. for Polymer Research, Mainz (Germany)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1436798
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Inorganic Chemistry
Additional Journal Information:
Journal Volume: 57; Journal Issue: 3; Journal ID: ISSN 0020-1669
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; thermal conductivity; oxides; physical and chemical processes; electrical conductivity; phase transitions

Citation Formats

Joos, Markus, Cerretti, Giacomo, Veremchuk, Igor, Hofmann, Patrick, Frerichs, Hajo, Anjum, Dalaver H., Reich, Tobias, Lieberwirth, Ingo, Panthöfer, Martin, Zeier, Wolfgang G., and Tremel, Wolfgang. Spark Plasma Sintering (SPS)-Assisted Synthesis and Thermoelectric Characterization of Magnéli Phase V6O11. United States: N. p., 2018. Web. doi:10.1021/acs.inorgchem.7b02669.
Joos, Markus, Cerretti, Giacomo, Veremchuk, Igor, Hofmann, Patrick, Frerichs, Hajo, Anjum, Dalaver H., Reich, Tobias, Lieberwirth, Ingo, Panthöfer, Martin, Zeier, Wolfgang G., & Tremel, Wolfgang. Spark Plasma Sintering (SPS)-Assisted Synthesis and Thermoelectric Characterization of Magnéli Phase V6O11. United States. https://doi.org/10.1021/acs.inorgchem.7b02669
Joos, Markus, Cerretti, Giacomo, Veremchuk, Igor, Hofmann, Patrick, Frerichs, Hajo, Anjum, Dalaver H., Reich, Tobias, Lieberwirth, Ingo, Panthöfer, Martin, Zeier, Wolfgang G., and Tremel, Wolfgang. 2018. "Spark Plasma Sintering (SPS)-Assisted Synthesis and Thermoelectric Characterization of Magnéli Phase V6O11". United States. https://doi.org/10.1021/acs.inorgchem.7b02669. https://www.osti.gov/servlets/purl/1436798.
@article{osti_1436798,
title = {Spark Plasma Sintering (SPS)-Assisted Synthesis and Thermoelectric Characterization of Magnéli Phase V6O11},
author = {Joos, Markus and Cerretti, Giacomo and Veremchuk, Igor and Hofmann, Patrick and Frerichs, Hajo and Anjum, Dalaver H. and Reich, Tobias and Lieberwirth, Ingo and Panthöfer, Martin and Zeier, Wolfgang G. and Tremel, Wolfgang},
abstractNote = {The Magnéli phase V6O11 was synthesized in gram amounts from a powder mixture of V6O11/V7O13 and vanadium metal, using the spark plasma sintering (SPS) technique. Its structure was determined with synchrotron X-ray powder diffraction data from a phase-pure sample synthesized by conventional solid-state synthesis. A special feature of Magnéli-type oxides is a combination of crystallographic shear and intrinsic disorder that leads to relatively low lattice thermal conductivities. SPS prepared V6O11 has a relatively low thermal conductivity of κ = 2.72 ± 0.06 W (m K)–1 while being a n-type conductor with an electrical conductivity of σ = 0.039 ± 0.005 (μΩ m)–1, a Seebeck coefficient of α = –(35 ± 2) μV K–1, which leads to a power factor of PF = 4.9 ± 0.8 × 10–5W (m K2)–1 at ~600 K. Advances in the application of Magnéli phases are mostly hindered by synthetic and processing challenges, especially when metastable and nanostructured materials such as V6O11 are involved. Here, this study gives insight into the complications of SPS-assisted synthesis of complex oxide materials, provides new information about the thermal and electrical properties of vanadium oxides at high temperatures, and supports the concept of reducing the thermal conductivity of materials with structural building blocks such as crystallographic shear (CS) planes.},
doi = {10.1021/acs.inorgchem.7b02669},
url = {https://www.osti.gov/biblio/1436798}, journal = {Inorganic Chemistry},
issn = {0020-1669},
number = 3,
volume = 57,
place = {United States},
year = {Thu Jan 11 00:00:00 EST 2018},
month = {Thu Jan 11 00:00:00 EST 2018}
}

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