The vapor pressure of trimellitic anhydride (TMA) over the range 60°–160°C was determined. The dynamic technique of gas saturation, or transpiration, was employed to generate TMA vapor at constant temperature. The generated TMA vapor was collected on a small Chromosorb 104 trap that was ...
The vapor pressure of a chemical compound is a measure of its volatility: the higher the vapor pressure at a given temperature, the greater the probability that the substance is in the gaseous state rather than the condensed phase (liquid or solid). The vapor pressure of a substance increases...
摘要: A discussion of some of the problems involved in computing saturation vapor pressure of water for meteorological applications. Two formulations for saturation vapor pressure in the pure phase over a plane surface of water or ice are considered: the...关键词:...
The wetting of MgO and α-Al2O3 polycrystalline plates by molten Mg in purified argon was studied between 973 and 1273 K using an improved sessile drop method. The MgO/Mg system is basically non-reactive while Al2O3/Mg is reactive. The common features in the non-reactive and reactive sy...
pressure, so that at least part of the second group III-nitride layer having an N-face is doped, the misoriented substrate being a polished Carbon Polar Silicon Carbide substrate, and depositing a graded or stepped group III-nitride layer, e.g., the layer has a changing composition of ...
Effect of electron beam energy on secondary negative ion—molecule reactions in NO2 under high-pressure mass spectrometry conditions The abundances of negative ions resulting from 1 keV electron beam irradiation of gaseous NO2 and its mixtures with H2 were measured in a high-pressure mas... S. ...
Then the flow rates of the gases are controlled by flow rate controllers 17a, 17b, mixed in a second mixing unit 18 and used for crystal growth together with PH3 which has been led through a reactive tube 19 kept at a reduced pressure and supplied from a cylinder. Thus control of ...
The transferred substrate is dried under reduced pressure (~10 millitorr) for 24 h and left in air for three days. Finally, the PMMA/ PVA carrier is removed by dissolving the PVA in deionized water at 130 °C. PbPflaolVyMolleAcoArMkwsfstowoeAefdlra/uMPstbthiyVfooleSocAng2aoroutaao...
Low-pressure sodium lamps. They are gaseous, produce 150 lumens per watt, have a life of about 15,000 hours, and are even more efficient than high-pressure sodium. These lamps are expensive to maintain. • LED(light emitting diodes). These are small lights, such as Christmas bulbs, and...
an ultimate vacuum degree of the deposition chamber is less than 10Pa and working air pressure in the deposition chamber is in a range of 0.01-50Pa; gas at the gas inlets comprises argon and reaction gas such as silane gas and metal alkoxide gas; the anode in the device is communicated ...