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Vapours
About: Vapours is a research topic. Over the lifetime, 1153 publications have been published within this topic receiving 15022 citations.
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14 citations
TL;DR: In this paper, the corrosion of patinated and unpatinated bronze by acetic and formic acid vapours, sulphur dioxide and sodium chloride salt particles, at 100% relative humidity, was studied.
Abstract: This paper studies the corrosion of patinated and unpatinated bronze by acetic and formic acid vapours, sulphur dioxide and sodium chloride salt particles, at 100% relative humidity. Weight loss, X-ray diffraction, infrared and scanning electron microscopy were the techniques used. Acetic and formic acid vapours, sulphur dioxide and sodium chloride produce a high corrosion rate on bronze. In general, no protective effect was found by the patina on bronze. The principal compounds identified were Cu 2 O, Cu 2 S, Cu 5 (SO 4 ) 2 (OH) 6 . 5H 2 O, Cu(CH 3 CO 2 ) 2 . XH 2 O and Cu(HCO 2 ) 2 .
14 citations
TL;DR: In this article, a series of sensors with various weight percentages of benzoyl peroxide added to the solution are fabricated for the optimization of the polymeric films, and the surface morphologies of the QCM sensor before and after gas adsorption are characterized by AFM.
Abstract: Polymerized castor oil based quartz crystal microbalance (QCM) sensors are fabricated for the detection of aliphatic amines vapours. The sensors are fabricated by solution dip-dry method followed by heating at 100 °C under argon atmosphere to get cross linked film on QCM surface. A series of sensors with various weight percentages of benzoyl peroxide added to the solution are fabricated for the optimization of the sensitivities of the polymeric films. It is found that the sensor fabricated with a solution having 1.40% (w/v) of benzoyl peroxide has high sensitivity for vapours of organic compounds and are very effective for aliphatic amines vapours. The adsorption of the vapours to the surface of the QCM sensor is determined by the frequency shift of QCM. The frequency shift linearly increases with the gas vapour concentrations from 5 to 250 ppm at room temperature. The sensitivity-values of methylamine, ethylamine, tert-butylamine, diethylamine, triethylamine and ammonia vapours are 0.917, 0.657, 0.655, 0.543, 0.407 and 0.397 Hz/ppm respectively. The structure of the polymeric film is studied by FTIR spectra. The surface morphologies of the QCM sensor before and after gas adsorption are characterized by AFM, which indicates mild swelling of the surface after adsorption and it is reversible.
14 citations
01 Jan 1994
TL;DR: In this paper, an analysis of available data on the viscosity and thermal conductivity coefficients of the alkali metal vapours is presented, based upon theoretical calculations of the properties of the monatomic systems, described in the preceeding parts I and I.
Abstract: An analysis of the available data on the viscosity and thermal conductivity coefficients of the alkali metal vapours is presented. The analysis is based upon theoretical calculations of the properties of the monatomic systems, described in the preceeding parts I and I.A of the present paper, and making use of the kinetic theory of a binary gas reacting mixture. A summary of the measurement techniques used, including, whenever possible, the magnitude of the corrections performed on the raw data and the nominal precision of the results, complements the analysis.
It is concluded that it is possible to select precise and mutually consistent sets of experimental results for both viscosity and thermal conductivity coefficients of lithium, sodium and potassium vapours among the available literature data and to classify all the data in uncertainty classes. Regarding rubidium and cesium no systematic discussion is possible due to a lack of experimental data with sufficient precision.
14 citations
TL;DR: In this article, the authors focused on the detection of vapours of 2, 4, 6 trinitrotoluene (TNT), DNT, and pentaerythrite tetranitrate (PETN) with quartz crystal microbalances operated at 100 MHz.
14 citations