Results 201 to 210 of about 14,276 (253)

Microcrystalline silicon deposited by the hot-wire CVD technique

Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 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).
R Bruggemann, J Guillet, C Longeaud
exaly   +2 more sources

Thermal diffusivity measurement by the transient hot-wire technique: A reappraisal

International Journal of Thermophysics, 1988
The theory of the transient hot-wire technique for thermal conductivity measurements is reassessed in the special context of thermal diffusivity measurements. A careful examination of the working equation and an error analysis are employed to identify the principal sources of error.
William Wakeham, H M Röder, Nieto De Castro C A   +2 more
exaly   +2 more sources

N-Type Silicon Films Produced by Hot Wire Technique [PDF]

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
openaire   +2 more sources

Radiation effects in the transient hot-wire technique

Journal of Thermal Analysis and Calorimetry, 2006
J E S Venart
exaly   +2 more sources

On the rotating, slanted, hot-wire technique

Experiments in Fluids, 1991
The purpose of this paper is to convey information and experience gained in the use of a rotating slanted hot-wire probe to measure the complete Reynolds stress tensor and the mean velocity vector. The technique is limited to nearly one-dimensional flows with turbulence intensities less than 10%.
S. Russ, T. W. Simon
openaire   +1 more source

Technique for preparing hot wires

Journal of Scientific Instruments, 1963
A method is described of preparing hot wires which enables the wires to be discarded after a short period of use. A detailed description is given of how the hot wire is fastened to the supporting needles.
Meel, D.A. van, Vermij, H.
openaire   +2 more sources

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
openaire   +1 more source

The Transient Hot-Wire Technique: A Numerical Approach

International Journal of Thermophysics, 1998
The measurement of the thermal conductivity of a fluid by means of the transient hot-wire technique so far has made use of an analytical solution of the energy conservation equation for an ideal model, coupled with a set of approximate analytical corrections to account for small departures from the model. For this solution to be valid, constraints were
M. J. Assael, L. Karagiannidis, N. Malamataris, W. A. Wakeham   +3 more
openaire   +1 more source

Hot-Wire Technique for Droplet Measurements

1984
An instrument using hot-wire technology to measure droplet size distributions in the 1 to 450 µm size range is discussed. Such instrumentation has several advantages over present techniques which are dominated by a variety of laser light scattering approaches.
DS Mahler, DE Magnus
openaire   +1 more source

Development and application of a quadruple hot-wire technique for turbulent flows

Measurement Science and Technology, 1996
An analytical evaluation method to compute the instantaneous velocity vector from the signals of multiple hot-wire probes with nearly arbitrary geometry was developed. The domain of flow angles, in which for any given set of measured sensor voltages only one single solution for the instantaneous velocity vector exists, was determined for several probe ...
Rosemann, H., Staeger, R., Kreplin, H.-P.   +2 more
openaire   +3 more sources