Results 231 to 240 of about 480,384 (278)

Isotropic Negative Thermal Expansion Metamaterials [PDF]

ACS Applied Materials & Interfaces, 2016
Negative thermal expansion materials are important and desirable in science and engineering applications. However, natural materials with isotropic negative thermal expansion are rare and usually unsatisfied in performance. Here, we propose a novel method to achieve negative thermal expansion via a metamaterial approach. The metamaterial is constructed
Lingling Wu, Ji Zhou
exaly   +4 more sources

Some of the next articles are maybe not open access.

Related searches:

Chemical Diversity for Tailoring Negative Thermal Expansion

Chemical Reviews, 2022
Negative thermal expansion (NTE), referring to the lattice contraction upon heating, has been an attractive topic of solid-state chemistry and functional materials. The response of a lattice to the temperature field is deeply rooted in its structural features and is inseparable from the physical properties.
Kun Lin, Zhanning Liu, Lei Hu
exaly   +3 more sources

Negative Thermal Expansion in Nanosolids

Accounts of Chemical Research, 2019
Nanosolids usually exhibit a variety of peculiar physical features due to the size effect. The unique surface electronic states and coordination structures of nanosolids make them particularly important as promising functional materials. After several decades of research effort on the preparation processes and formation mechanisms of nanomaterials, the
Qiang Li, He Zhu, Lei Hu, Jun Chen, Xianran Xing   +4 more
openaire   +2 more sources

Negative thermal expansion materials

Physica B: Condensed Matter, 1997
Abstract The recent discovery of negative thermal expansion over an unprecedented temperature range in ZrW 2 O 8 (which contracts continuously on warming from below 2 K to above 1000 K) has stimulated considerable interest in this unusual phenomenon.
John S O Evans, A W Sleight
exaly   +2 more sources

Negative thermal expansion in molecular materials

Chemical Communications, 2018
Some mechanisms resulting in negative thermal expansion in molecular materials are summarized.
Zhanning Liu, Qilong Gao, Jun Chen, Jinxia Deng, Kun Lin, Xianran Xing   +5 more
openaire   +2 more sources

Negative thermal expansion: a review

Journal of Materials Science, 2009
Most materials demonstrate an expansion upon heating, however a few are known to contract, i.e. exhibit a negative coefficient of thermal expansivity (NTE). This naturally occurring phenomenon has been shown to occur in a range of solids including complex metal oxides, polymers and zeolites, and opens the door to composites with a coefficient of ...
W. Miller, C. W. Smith, D. S. Mackenzie, K. E. Evans   +3 more
openaire   +1 more source

Origin of the negative thermal expansion in and

Journal of Physics: Condensed Matter, 1996
The negative thermal expansion recently observed over a wide range of temperatures in may be attributed to the existence of low-frequency phonon modes which can propagate with no distortions of the tetrahedra and octahedra, the so-called `rigid unit modes'.
Alexandra K A Pryde, Kenton D Hammonds, Martin T Dove, Volker Heine, Julian D Gale, Michele C Warren   +5 more
openaire   +1 more source

Negative Thermal Expansion

MRS Proceedings, 2002
ABSTRACTNegative thermal expansion behavior has been found in many oxides where oxygen or a cation has a coordination number of two. The MO2, AM2O7, A2M3O12, AMO5, and AO3 families, where A is an octahedral cation, M a tetrahedral cation, and the oxygen coordination is two, have been investigated for their thermal expansion properties. Negative thermal
openaire   +1 more source

Negative thermal expansion in Y2W3O12

International Journal of Inorganic Materials, 1999
Abstract Neutron diffraction data were collected on polycrystalline Y2W3O12 at seven temperatures from 15 to 1373 K. All three cell edges of orthorhombic Y2W3O12 decrease with increasing temperature, giving an average linear thermal expansion coefficient of −7.0×10−6 K−1.
P.M. Forster, A.W. Sleight
openaire   +1 more source