Results 241 to 250 of about 392,773 (303)

Unexpected low thermal expansion coefficients of pentadiamond

Physical Chemistry Chemical Physics, 2022
Though pentadiamond is softer than diamond, the thermal expansion coefficients of pentadiamond are lower than those of diamond.
Mingqing Liao, Yi Wang, Fengjiang Wang, Jingchuan Zhu, Zi-Kui Liu   +4 more
openaire   +2 more sources

Negative Thermal Expansion Coefficient

2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON), 2019
Physical nature of negative thermal expansion coefficient ($\alpha$) in polar-sensitive dielectrics and semiconductors is explained. Physical features of inter-atomic bonds in crystals are manifested in their thermal expansion; in the polar dielectrics it is a peculiar polar-sensitive structure, arisen due to compensation of atoms electronegativity ...
Y.M. Poplavko, Y.V. Didenko, Y.I. Yakimenko   +2 more
openaire   +1 more source

Thermal expansion coefficient of titanium casting

Journal of Oral Rehabilitation, 2001
A reliable measurement of the thermal expansion coefficient (α) value is required to achieve a positive thermal mismatch between metal and porcelain for porcelain‐fused to metal crowns. Heating rate and specimen conditions may significantly influence the α value and the effects of these factors were studied.
D, Low, T, Sumii, M, Swain
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Ultraprecise Measurement of Thermal Coefficients of Expansion

Applied Optics, 1970
A novel method for determining thermal expansion coefficients has been devised. It is based on the dependence of Fabry-Perot resonances on the mirror separation. The expansion sample is formed into an etalon spacer, with highly reflecting endplates optically contacted to each end.
S F, Jacobs, J N, Bradford, J W, Berthold Iii   +2 more
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Thermal Expansion Coefficients of Bismuth

Journal of Applied Physics, 1960
The linear thermal expansion coefficients of the a and c axes of bismuth have been measured from 80°K to 540°K by mechanical means. These same coefficients were determined over a more limited range of temperatures by single crystal and powder x-ray methods. The mechanical and x-ray values did not differ significantly.
E. F. Cave, L. V. Holroyd
openaire   +1 more source

Very Low Thermal Expansion Coefficient Materials

Annual Review of Materials Research, 1989
Materials science treats the relations of composition and structure, on the one hand, to properties. On the other hand, the task of materials engineer­ ing is to design, evaluate, and optimize potential applications of a (new) material. In the last four decades dramatic advances have demonstrated how far our understanding of materials science and ...
R Roy, D K Agrawal, H A McKinstry
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Thermal Expansion Coefficients of Unidirectional Composites

Journal of Composite Materials, 1978
An analytical and experimental investigation on thermal expansion coef ficients of unidirectional composites (UD) is carried out. The fiber aniso tropy and temperature dependency of the constituent material properties are considered in the formulation of the problem.
Takashi Ishikawa, Kazuo Koyama, Shigeo Kobayashi   +2 more
openaire   +1 more source

Thermal Expansion Coefficient

1968
The bond lengths between segments of a polymer chain are virtually independent of temperature and impose restraints on the expansion which occurs as the temperature is raised. Polymer systems therefore have lower expansivities than related liquids which are not polymeric.
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Coefficient of thermal expansion of AlMgB14

Scripta Materialia, 2002
Abstract The coefficient of thermal expansion (COTE) of AlMgB14 was measured by dilatometry and by high temperature X-ray diffraction using synchroton radiation. The COTE over the temperature range 298 K to 1373 K was determined to be 9×10−6 K−1, which is relatively close to the value of 8.3×10−6 K−1 for pure B.
A.M. Russell, B.A. Cook, J.L. Harringa, T.L. Lewis   +3 more
openaire   +1 more source