Results 31 to 40 of about 480,384 (278)
Optimized negative thermal expansion property in low-cost Mg2P2O7-based bulk material
Results in Physics, 2022 Negative thermal expansion (NTE) is an intriguing physical phenomenon, which is of great significance for the high precision application. In this work, we have realized to broaden the NTE temperature zone in Mg2P2O7-based bulk material by doping Cu atom ...
Yige Du +8 more
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Fabrication and characterization of ZrW2O8-Cf/E51 negative thermal expansion composite
Materials Research Express, 2020 ZrW _2 O _8 -C _f /E51 composite with a negative Coefficient of Thermal Expansion (CTE) was fabricated by a method combining mechanical stirring with ultrasonic vibration, then microstructures and properties of the composites were analyzed and summarized
Luyan Ju +5 more
doaj +1 more source
Mechanisms and Materials for NTE
Frontiers in Chemistry, 2018 Negative thermal expansion (NTE) upon heating is an unusual property but is observed in many materials over varying ranges of temperature. A brief review of mechanisms for NTE and prominent materials will be presented here.
J. Paul Attfield
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A novel design of mechanical metamaterial incorporating multiple negative indexes
Materials Research Express, 2023 Mechanical metamaterials that combine multiple negative properties are rare, but have great appeal for applications in multipurpose devices. Herein, a novel metamaterial incorporating negative Poisson’s ratio, negative compressibility, and negative ...
Yu Yao +3 more
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Modeling Wear and Friction Regimes on Ceramic Materials with Positive and Negative Thermal Expansion
Lubricants, 2023 Computer modeling of rubbing between two surfaces with microasperities capable of expanding or contracting under conditions of frictional heating (i.e., possessing either positive and negative coefficient of thermal expansion (CTE)) allowed for the ...
Aleksandr S. Grigoriev +3 more
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Negative Thermal Expansion Properties of Sm0.85Sr0.15MnO3-δ
Journal of Composites Science, 2022 A novel negative thermal expansion (NTE) material composed of Sm0.85Sr0.15MnO3-δ was synthesized using the solid-state method. By allowing Sr2+ to partially replace Sm3+ in SmMnO3, the ceramic material Sm0.85Sr0.15MnO3-δ exhibits NTE properties between 360K and 873K, and its average negative thermal expansion coefficient was −10.08 × 10−6/K.
Yucheng Li +3 more
openaire +1 more source
Which phonons contribute most to negative thermal expansion in ScF3?
APL Materials, 2023 Using calculations of the phonon distribution in ScF3 across the whole of reciprocal space, we show that the important phonons for the negative thermal expansion in this material are those associated with the rigid unit modes (RUMs) and associated quasi ...
Martin T. Dove +4 more
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Quantum effects in the radial thermal expansion of bundles of single-walled carbon nanotubes doped with 4He [PDF]
, 2010 The radial thermal expansion (ar) of bundles of single-walled carbon nanotubes saturated with 4He impurities to the molar concentration 9.4% has been investigated in the interval 2.5-9.5 K using the dilatometric method.
A. V. Dolbin +9 more
core +2 more sources
Negative thermal expansion of water in hydrophobic nanospaces [PDF]
Phys. Chem. Chem. Phys., 2012 The density and intermolecular structure of water in carbon micropores (w = 1.36 nm) are investigated by small-angle X-ray scattering (SAXS) and X-ray diffraction (XRD) measurements between 20 K and 298 K. The SAXS results suggest that the density of the water in the micropores increased with increasing temperature over a wide temperature range (20-277
Ryusuke, Futamura +3 more
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Magnetic ordering and negative thermal expansion in PrFeAsO [PDF]
Physical Review B, 2008 We report the structure and magnetism of PrOFeAs, one of the parent phases of the newly discovered Fe-As superconductors, as measured by neutron powder diffraction. In common with other REOFeAs materials, a tetragonal-orthorhombic phase transition is found on cooling below 136 K and striped Fe magnetism with $k =$(1,0,1) is detected below $\sim$ 85 K ...
Kimber, S. A. J. +11 more
openaire +3 more sources