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Negative Thermal Expansion Materials

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (15 January 2017) | Viewed by 11552

Special Issue Editor


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Guest Editor
Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99352, USA
Interests: oxides; multiferroics; negative thermal expansion; soil science; mineral-organic interactions; bio/geoscience; x-ray diffraction; x-ray computed tomography; x-ray absorption spectroscopy; scanning transmission x-ray microscopy

Special Issue Information

Dear Colleagues,

This Special Issue on “Negative Thermal Expansion (NTE) Materials” is dedicated to new developments in the NTE materials field during the past five years. Specifically, we invite you to submit research articles or reviews on new metal organic frameworks exhibiting NTE, new NTE composites, current application-related challenges for composites, and current developments in the mechanistic understanding of NTE including theoretical modeling and variable temperature and pressure experimental work. New research on NTE materials that show a combination of controllable physical properties (e.g., (ferro)electric, (ferro)magnetic, photovoltaic, luminescent, etc.) for potential “smart” materials are also welcome.

Dr. Tamas Varga
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

negative thermal expansion (NTE), metal organic frameworks, NTE composites, “smart” NTE materials, theory, mechanisms

Published Papers (2 papers)

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Research

2325 KiB  
Article
Fundamentals of Thermal Expansion and Thermal Contraction
by Zi-Kui Liu, Shun-Li Shang and Yi Wang
Materials 2017, 10(4), 410; https://doi.org/10.3390/ma10040410 - 14 Apr 2017
Cited by 22 | Viewed by 6872
Abstract
Thermal expansion is an important property of substances. Its theoretical prediction has been challenging, particularly in cases the volume decreases with temperature, i.e., thermal contraction or negative thermal expansion at high temperatures. In this paper, a new theory recently developed by the authors [...] Read more.
Thermal expansion is an important property of substances. Its theoretical prediction has been challenging, particularly in cases the volume decreases with temperature, i.e., thermal contraction or negative thermal expansion at high temperatures. In this paper, a new theory recently developed by the authors has been reviewed and further examined in the framework of fundamental thermodynamics and statistical mechanics. Its applications to cerium with colossal thermal expansion and Fe3Pt with thermal contraction in certain temperature ranges are discussed. It is anticipated that this theory is not limited to volume only and can be used to predict a wide range of properties at finite temperatures. Full article
(This article belongs to the Special Issue Negative Thermal Expansion Materials)
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1236 KiB  
Communication
Negative Thermal Expansion in Ba0.5Sr0.5Zn2SiGeO7
by Christian Thieme and Christian Rüssel
Materials 2016, 9(8), 631; https://doi.org/10.3390/ma9080631 - 27 Jul 2016
Cited by 13 | Viewed by 4000
Abstract
Solid solutions with the composition Ba0.5Sr0.5Zn2Si2-xGexO7 and BaZn2Si2-xGexO7 were prepared with different values of x using a conventional mixed oxide route. Both compounds exhibit very [...] Read more.
Solid solutions with the composition Ba0.5Sr0.5Zn2Si2-xGexO7 and BaZn2Si2-xGexO7 were prepared with different values of x using a conventional mixed oxide route. Both compounds exhibit very different thermal expansion, which is due to the different crystal structures. Ba0.5Sr0.5Zn2Si2-xGexO7 solid solutions exhibit the structure of high-temperature BaZn2Si2O7 and show negative thermal expansion, which was proven via high-temperature X-ray diffraction. Up to around x = 1, the crystal structure remains the same. Above this value, the low-temperature phase becomes stable. The Sr-free solid solutions have the crystal structure of low-temperature BaZn2Si2O7 and show also a limited solubility of Ge. These Sr-free compositions show transitions of low- to high-temperature phases, which are shifted to higher temperatures with increasing Ge-concentration. Full article
(This article belongs to the Special Issue Negative Thermal Expansion Materials)
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