Negative thermal expansion in ZnF$_2$ [PDF]
Applied Physics Letters, 2011 We have investigated temperature dependence of the lattice parameters and the unit cell volume of ZnF$_2$ by neutron diffraction and have discovered negative thermal expansion (NTE) at low temperature.
Chatterji, Tapan +2 more
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Soft Manifold Dynamics Behind Negative Thermal Expansion [PDF]
Physical Review Letters, 2008 Minimal models are developed to examine the origin of large negative thermal expansion (NTE) in under-constrained systems. The dynamics of these models reveals how underconstraint can organize a thermodynamically extensive manifold of low-energy modes ...
A. P. Ramirez +4 more
core +3 more sources
Elastic mechanics solution of thermal expansion of bi-material curved beam and its application to negative thermal expansion metamaterials [PDF]
Scientific Reports, 2022 Thermal stress impacts various engineering fields significantly, such as aerospace and precision instruments. This adverse effect can be greatly reduced, if not eliminated, by the application of micro-thermal expansion materials, and bi-material beams ...
Jingxiang Huang +2 more
doaj +2 more sources
Negative thermal expansion materials: technological key for control of thermal expansion
Science and Technology of Advanced Materials, 2012 Most materials expand upon heating. However, although rare, some materials contract upon heating. Such negative thermal expansion (NTE) materials have enormous industrial merit because they can control the thermal expansion of materials.
Koshi Takenaka
doaj +3 more sources
Efficient Calculation of the Negative Thermal Expansion in ZrW2O8 [PDF]
Frontiers in Chemistry, 2018 We present a study of the origin of the negative thermal expansion (NTE) on ZrW2O8 by combining an efficient approach for computing the dynamical matrix with the Lanczos algorithm for generating the phonon density of states in the quasi-harmonic ...
Fernando D. Vila +2 more
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Description of lattice anharmonicity observed in ferroelectrics with unusual three-well local potential [PDF]
Condensed Matter Physics, 2018 For Sn_2P_2S_6 family of uniaxial ferroelectrics, the anharmonic quantum oscillators model, based on local three-well potential for spontaneous polarization fluctuations, has been used for a description of anharmonic properties, namely thermal expansion.
R. Yevych, Yu. Vysochanskii
doaj +2 more sources
Progress of Research in Negative Thermal Expansion Materials: Paradigm Shift in the Control of Thermal Expansion [PDF]
Frontiers in Chemistry, 2018 To meet strong demands for the control of thermal expansion necessary because of the advanced development of industrial technology, widely various giant negative thermal expansion (NTE) materials have been developed during the last decade.
Koshi Takenaka
doaj +2 more sources
Colossal negative thermal expansion in reduced layered ruthenate [PDF]
Nature Communications, 2017 Materials displaying negative thermal expansion have received interest as thermal-expansion compensators. Here, authors report very large total volume change associated with this effect in reduced calcium ruthenates and propose a microstructural origin ...
Koshi Takenaka +4 more
doaj +2 more sources
Porous composite with negative thermal expansion obtained by photopolymer additive manufacturing
APL Materials, 2015 Additive manufacturing (AM) could be a novel method of fabricating composite and porous materials having various effective performances based on mechanisms of their internal geometries.
Akihiro Takezawa +2 more
doaj +3 more sources
Negative Thermal Expansion in the Materials With Giant Magnetocaloric Effect [PDF]
Frontiers in Chemistry, 2018 Negative thermal expansion (NTE) behaviors in the materials with giant magnetocaloric effects (MCE) have been reviewed. Attentions are mainly focused on the hexagonal Ni2In-type MM'X compounds.
Fengxia Hu +12 more
doaj +2 more sources