Results 261 to 270 of about 181,254 (309)

Deposition of a-Si:H with the hot-wire technique

Journal of Non-Crystalline Solids, 1993
Amorphous hydrogenated silicon (a-Si:H) was deposited by SiH 4 decomposition on a bot tungsten filament. A substrate temperature of T s =400 o C was chosen since an improved degradation behaviour is expected is expected as a result of low hydrogen incorporation. The effects of gas pressure, substrate-to-filament distance d s-f and filamenttemperature
R. Zedlitz, F. Kessler, M. Heintze
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Microcrystalline silicon deposited by the hot-wire CVD technique

Materials Science and Engineering: B, 2000
Abstract Hot-wire chemical vapour deposition (HW-CVD) is a well-known technique to deposit amorphous silicon with high deposition rates from the decomposition of silane and hydrogen gases. By changing the hydrogen and silane flow rates, it is possible to observe a transition from amorphous silicon (a-Si:H) to microcrystalline silicon (μc-Si:H).
J Guillet, C Niikura, J.E Bourée, J.P Kleider, C Longeaud, R Brüggemann   +5 more
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Practical Advances on the Hot Wire Technique

Key Engineering Materials, 2008
In this work, a numerical simulation model is proposed with the purpose of determining the minimum and maximum measuring time for the hot wire parallel technique. An alternative experimental arrangement is also proposed for materials with thermal conductivity higher than 15W/mk. In this case, the experimental thermal transient is detected very close to
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A crossed hot-wire technique for complex turbulent flows

Experiments in Fluids, 1991
This paper describes a crossed hot-wire technique for the measurement of all components of mean velocity, Reynolds stresses, and triple products in a complex turbulent flow. The accuracy of various assumptions usually implicit in the use of crossed hot-wire anemometers is examined.
A. D. Cutler, P. Bradshaw
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N-Type Silicon Films Produced by Hot Wire Technique

MRS Proceedings, 2000
ABSTRACTThe role of the deposition pressure (p) and the type of filaments (tungsten, W or tantalum, Ta) used to produce large area (10cm×10cm) n-type Si:H films by hot wire chemical vapour (HW-CVD) deposition technique was investigated. The data show that the electro-optical properties of the films produced are dependent on the gas pressure used.
Isabel M. M. Ferreira, Ana M. F. Cabrita, Elvira M. C. Fortunato, Rodrigo F. P. Martins   +3 more
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An oscillating hot-wire technique for resolving the magnitude and direction of velocity measurements using single hot-wire sensors

Experiments in Fluids, 2003
Thermal anemometry is a classic flow-velocity measurement technique that is known to suffer from the inability to discern the flow direction. The current paper describes an innovative approach whereby an oscillating hot wire is used to extract velocity direction and magnitude information from single hot-wire measurements.
Y. Li, A. Naguib
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Turbulent mass flux measurements using a laser/hot-wire technique

International Journal of Heat and Mass Transfer, 1988
Abstract A laser-Doppler anemometer and a hot-wire type concentration probe are used to measure the velocity and species concentration fields simultaneously in an axisymmetric sudden-expansion flow. The presence of the probe has a negligible effect on the Doppler signals.
J.Y. Zhu, R.M.C. So, M.V. Otugen
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Nanocrystalline silicon carbon doped films prepared by hot wire technique

Vacuum, 1999
Abstract In this work we present data concerning the structure, composition and electro-optical performances of nanocrystalline silicon carbide doped films produced at the different filament temperatures and hydrogen dilution ratios. The XRD spectra reveal the presence of the typical Si peaks ascribed to (111) (220) and (311) diffraction planes ...
I Ferreira, B Fernandes, R Martins
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Generalised hot-wire technique for high pressure thermal conductivity measurements

Journal of Physics E: Scientific Instruments, 1988
The application of the generalised hot-wire technique to high pressure thermal conductivity measurement is discussed. Results for the thermal conductivity of NaCl obtained with a wire sandwiched between two homogeneous discs, one of NaBr and one of NaCl, were recorded in the pressure range 0-4 GPa.
R J Gummow, I Sigalas
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Thermal conductivity of biological tissues using transient hot-wire technique

SPIE Proceedings, 2001
In this paper, we present our experimental results on the determination of the thermal conductivity of biological tissues using a transient technique based on the principles of cylindrical hot-wire method. A novel, 1 .45mmdiameter, 50mm long hot wire probe was deployed.
Anandaroop Bhattacharya, Roop L. Mahajan
openaire   +1 more source