Borosilicate films

Protection of steels from high temperature oxidation is made by various inorganic coating films such as Si02 film (De Sanctis, 1990), borosilicate film (Guglielmi) and aluminosilicate film (Di Giampaolo Conde, 1992). 

Figure 1. Surface photografting apparatus (a) 100W high-pressure Hg lamp (b) interference filter (c) borosilicate glass plate (d) reacting solution (e) polymer film (f) glass vessel (g) clamp screw (17)...

A general discussion of the nature and importance of these chamber characteristics, including wall effects, follows. For detailed descriptions of various types of smog chamber facilities and their operation, one should consult the original literature, including, for example, indoor studies utilizing borosilicate glass cylinders (Joshi et al., 1982 Behnke et al., 1988), chambers made from Teflon (FEP) film with volumes up to... 

In the past ten years the number of chemistry-related research problems in the nuclear industry has increased dramatically. Many of these are related to surface or interfacial chemistry. Some applications are reviewed in the areas of waste management, activity transport in coolants, fuel fabrication, component development, reactor safety studies, and fuel reprocessing. Three recent studies in surface analysis are discussed in further detail in this paper. The first concerns the initial corrosion mechanisms of borosilicate glass used in high level waste encapsulation. The second deals with the effects of residual chloride contamination on nuclear reactor contaminants. Finally, some surface studies of the high temperature oxidation of Alloys 600 and 800 are outlined such characterizations are part of the effort to develop more protective surface films for nuclear reactor applications. ... 

The compounds (2-5 mg) were dissolved in 2.5 mL of THF (Aldrich, spectrophotometric grade) and 0.25 mL of water. 2-Hydroxypropylcellulose (Hercules, Klucel E 60,000 200mg) was then added and the mixture was shaken until the HPC dissolved completely. The solution was then placed in a open quartz cell (1mm deep) and evaporated in a circulating air oven (35°C) to dryness leaving a transparent film suitable for absorption measurements. Irradiation of the films was performed with the set-up described previously [11] using a medium pressure mercury lamp and a borosilicate glass filter to eliminate wavelengths below 300 nm. 

The polypeptide polyalanine was synthesized1 and characterized by Matrix Assisted Laser Desorption Ionization (MALDI) and amino acid hydrolyses. Monolayers of either l- or D-polyalanine polypeptides, in the form of an a-helix, were prepared by self-assembly on a borosilicate slide that was coated with a 200-300 nm thick gold film (Metallhandel Schroer Gmbh). Prior to the adsorption, the gold slides were annealed by flame and only then inserted into a 1 mM peptide solution of... 

Cast the viscous solution to a borosilicate slide using a glass pipette applying a thin film from the centre of the slide outwards. 

Figure 1. Energy profiles of particles emitted by the reaction for (a) a 2 nm thick surface deposition, (b) a 660 nm thick borosilicate glass film on Si, and (c) the excited state alpha particles from a borophosphosilicate glass film, 1200 nm thick.

The solid polymeric films were removed mechanically from the walls of the borosilicate glass tubing. The infrared spectra of the neat films were obtained using a Perkin-Elmer 421 spectrophotometer. The electron spin resonance spectra of the neat films were obtained on a Varian ESR 6 spectrometer. Elemental analyses were made by Galbraith Labs. Ther-... 

Films were formed by UV radiation of the samples (4 mils thick) held between borosilicate glass plates. The photoinitiator was BME at 1 % by weight. b The entries represent the value at break... 

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