Multiple internal reflection and simple transmission spectroscopy at IR wavelengths were used to determine the chemical composition of the films. The decrease in the thickness of the Si 3N 4 films after each oxidation run was measured by an ellipsometric technique using a hollow quartz prism. The ...
EA-CR series silicate composition rapid analyzer is designed for the silicate industry that has long used gravimetric method, volumetric method, spectrophotometric method, flame photometric method and atomic absorption photometric method to combine chemical analysis of materials. The ...
The qualitative and quantitative composition of hybrid Si/SiO x /SiO 2 /OH(D) nanoparticles synthesized from silicon monoxide has been determined by X-ray photoelectron spectroscopy. The nanoparticles are composed of a Si crystalline core and a SiO x /SiO 2 /OH(D) shell, where SiO x is th...
The chemical composition and average stoichiometry of deuterated and nondeuterated nanoparticles have been determined; the identified compositions have been compared. The dependence of photoluminescent properties on the composition of the samples has been discussed. Two forms of hydrophilic silicon ...
We provide a literature survey of a number of classical techniques used to quantify the chemical composition of porous silicon, highlighting their general merits and potential limitations with the material. Much of the early literature was focused on photoluminescent material, but increasingly there are...
The study reveals that the use of submicron size powder enhances the sintering process. In this investigation, effect of chemical composition on sintering and mechanical/thermomechanical properties has been studied. It was found that the densification process is dependent on the Al 2 O 3 /SiO 2 ...
1 Chemical Composition The chemical composition refers to the chemical constituents. Various chemical compositions result in different properties. For example, with the increase of carbon content, the strength, hardness and toughness of carbon steel will change; carbon steel is easy to rust, so stainl...
The present invention provides an aqueous composition useful for polishing silica and silicon nitride on a semiconductor wafer comprising by weight percent 0.01 to 5 carboxylic acid polymer, 0.02 to 6 abrasive, 0.01 to 10 polyvinylpyrrolidone, 0.005 to 5 cationic compound, 0.005 to 5 zwitterionic co...
Obviously, the processes determining mineral composition of sandstones are more complex than simple mixing ones from source areas of different kinds. The discrepancy is great between observed and theoretically possible combinations of minerals.This is a preview of subscription content, log in via an ...
The first band on the silicon collector is a region of intense carbon deposition, which is centered directly under the region of intensive plasma exposure and consists of great many irregularly formed grains. The average deposition thickness is 50–60 μm, but in some areas it is up to 140...