Next Article in Journal
SEM Analysis of the Interfacial Transition Zone between Cement-Glass Powder Paste and Aggregate of Mortar under Microwave Curing
Next Article in Special Issue
Effects of the CO2 Guest Molecule on the sI Clathrate Hydrate Structure
Previous Article in Journal
Design of Decorated Self-Assembling Peptide Hydrogels as Architecture for Mesenchymal Stem Cells
Previous Article in Special Issue
Earth Abundant Element Type I Clathrate Phases
Article Menu
Issue 9 (September) cover image

Export Article

Open AccessArticle
Materials 2016, 9(9), 732;

Structure and Transport Properties of Dense Polycrystalline Clathrate-II (K,Ba)16(Ga,Sn)136 Synthesized by a New Approach Employing SPS

Department of Physics, University of South Florida, Tampa, FL 33620, USA
Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, USA
Author to whom correspondence should be addressed.
Academic Editor: Matt Beekman
Received: 11 July 2016 / Revised: 15 August 2016 / Accepted: 22 August 2016 / Published: 26 August 2016
(This article belongs to the Special Issue Inorganic Clathrate Materials)
Full-Text   |   PDF [2005 KB, uploaded 26 August 2016]   |  


Tin clathrate-II framework-substituted compositions are of current interest as potential thermoelectric materials for medium-temperature applications. A review of the literature reveals different compositions reported with varying physical properties, which depend strongly on the exact composition as well as the processing conditions. We therefore initiated an approach whereby single crystals of two different (K,Ba)16(Ga,Sn)136 compositions were first obtained, followed by grinding of the crystals into fine powder for low temperature spark plasma sintering consolidation into dense polycrystalline solids and subsequent high temperature transport measurements. Powder X-ray refinement results indicate that the hexakaidecahedra are empty, K and Ba occupying only the decahedra. Their electrical properties depend on composition and have very low thermal conductivities. The structural and transport properties of these materials are compared to that of other Sn clathrate-II compositions. View Full-Text
Keywords: clathrate; SPS processing; thermoelectrics clathrate; SPS processing; thermoelectrics

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Wei, K.; Zeng, X.; Tritt, T.M.; Khabibullin, A.R.; Woods, L.M.; Nolas, G.S. Structure and Transport Properties of Dense Polycrystalline Clathrate-II (K,Ba)16(Ga,Sn)136 Synthesized by a New Approach Employing SPS. Materials 2016, 9, 732.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top