Results 11 to 20 of about 218,622 (313)

A Thermo-electric Apparatus for Thermal Diffusivity and Thermal Conductivity Measurements

Energies, 2019
In this study, a one-dimensional heat transfer measurement device is developed based on the mathematical theory of the Angstrom method. To conform to the mathematical assumption, it is required that the device precisely controls the heat source to ...
Wen-Hua Zhang, Wei-Keng Lin, Ching-Huang Tsai, Pei-Hsun Wu, Shih-Kuo Wu   +4 more
doaj   +1 more source

Thermal quadrupole method with internal heat sources [PDF]

, 2012
A new method based on the thermal quadrupoles technique for heat transfer modelling in multilayered slabs with heat sources is proposed. Classical thermal quadrupoles use hyperbolic functions and numerical problems occur according to the argument value ...
A. Kusiak, BATTAGLIA, Jean-Luc, PRADERE, Christophe, KUSIAK, Andrzej, PAILHES, Jerome, Batsale, J.-C., AREGBA, Aworou Waste, A.W. Aregba, TOUTAIN, Jerome, Aregba, A.W., AREGBA, Waste, J.-C. Batsale, C. Pradere, Kusiak, A., TOUTAIN, Jean, J. Toutain, J. Pailhes, Toutain, J., Pailhes, J., BATSALE, Jean-Christophe, Battaglia, J.-L., J.-L. Battaglia   +21 more
core   +1 more source

Reduction of boron diffusion in silicon-germanium by fluorine implantation [PDF]

, 2004
This paper investigates the effect of a 185 keV, 2.3×1015cm-2 F+ implant on boron thermal diffusion and boron transient enhanced diffusion (TED) in SiGe by characterising the diffusion of a boron marker layer in samples with and without a 288 keV, 6 ...
El Mubarek, H.A.W., Ashburn, P., El Mubarek, H. A W   +2 more
core   +1 more source

Investigation of Ytterbium Incorporation in Lithium Niobate for Active Waveguide Devices

Applied Sciences, 2020
In this work, we report on an investigation of the ytterbium diffusion characteristics in lithium niobate. Ytterbium-doped substrates were prepared by in-diffusion of thin metallic layers coated onto x- and z-cut congruent substrates at different ...
Christian E. Rüter, Dominik Brüske, Sergiy Suntsov, Detlef Kip   +3 more
doaj   +1 more source

Equivalent thermal diffusivity of natural and recycled aggregate concrete at temperature up to 350 ⁰C

Acta Polytechnica CTU Proceedings, 2022
The paper presents the evolution of equivalent thermal diffusivity with temperature of concretes with natural coarse aggregates and recycled concrete aggregates.
Izabela Hager, Katarzyna Mróz, Tomasz Tracz, Václav Kočí, Lukáš Fiala   +4 more
doaj   +1 more source

Effect of solid thermal conductivity and particle-particle contact on effective thermodiffusion coefficient in porous media [PDF]

, 2011
Transient mass transfer associated to a thermal gradient through a saturated porous medium is studied experimentally and theoretically to determine the effect of solid thermal conductivity and particle-particle contact on thermodiffusion processes.
Davarzani, Hossein, H. Davarzani, Quintard, Michel, M. Quintard, M. Marcoux, Marcoux, Manuel   +5 more
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110GHz fT Silicon Bipolar Transistors Implemented using Fluorine Implantation for Boron Diffusion Suppression [PDF]

, 2006
This paper investigates how fluorine implantation can be used to suppress boron diffusion in the base of a double polysilicon silicon bipolar transistor and hence deliver a record fT of 110 GHz.
Ashburn, Peter, El Mubarek, H.A.W., Bonar, J.M., Ashburn, P., Fiore, L., Kham, M. N., Petralia, R., El Mubarek, H. A W, Ward, P., Messina, A., Kham, M.N., Alemanni, C., Bonar, J. M.   +12 more
core   +1 more source

High-Speed Response Si PIN Photodetector Fabricated and Studied for Visible and Near Infrared Spectral Detection [PDF]

Engineering and Technology Journal, 2008
In the present work , PIN photodetector has been fabricated by vacuum evaporationtechnique, Al was evaporated on top side of an intrinsic – type silicon and In was evaporatedon down side and doped for each sides of an intrinsic silicon with thermal ...
Khalid Z. Yahiya
doaj   +1 more source

Discrimination of thermal diffusivity

World Haptics 2009 - Third Joint EuroHaptics conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, 2009
Materials such as wood or metal which are at equal temperatures are perceived to be of different 'coldness' due to differences in thermal properties, such as the thermal diffusivity. The thermal diffusivity of a material is a parameter that controls the rate with which heat is extracted from the hand when it touches an object of that material.
Wouter M. Bergmann Tiest, Astrid M. L. Kappers   +1 more
openaire   +4 more sources

Direct Measurement of Room-Temperature Nondiffusive Thermal Transport Over Micron Distances in a Silicon Membrane [PDF]

, 2012
The “textbook” phonon mean free path of heat carrying phonons in silicon at room temperature is ∼40  nm. However, a large contribution to the thermal conductivity comes from low-frequency phonons with much longer mean free paths.
Cuffe, John, Sotomayor Torres, C. M., Minnich, Austin J., Sotomayor, Clivia, Maznev, A.A., Johnson, Jeremy A., Nelson, Keith Adam, Nelson, Keith A., Sotomayor Torres, Clivia M., Torres, Clivia M. Sotomayor, Eliason, Jeffrey K., Chen, Gang, Maznev, A. A., Johnson, Jeremiah A., Eliason, Jeffrey Kristian, Kehoe, Timothy, Maznev, Alexei, Minnich, Austin Jerome, Johnson, Jeremy   +18 more
core   +1 more source