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2 edition of volatilization of constituents from borosilicate glass at elevated temperatures... found in the catalog.

volatilization of constituents from borosilicate glass at elevated temperatures...

L. F. Oldfield

volatilization of constituents from borosilicate glass at elevated temperatures...

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Published by Plenum Press in New York .
Written in English


Edition Notes

Statementby L.F. Oldfield and R.D. Wright.
SeriesCommunication no.1013
ContributionsWright, R. D.
The Physical Object
Paginationp.35-51
Number of Pages51
ID Numbers
Open LibraryOL13952974M

Measurements on the Thermal Dilatation of Glass at High Temperatures: Scientific Papers of the Bureau of Standards, Vol. 16 [C. G. Peters, C. H. Cragoe, National Bureau Department of Commerce] on *FREE* shipping on qualifying offers. In the National Bureau of Standards (NBS) was founded to provide standard weights and measures and to be the national physical laboratory for the Authors: C. H. Cragoe, C. G. Peters. sitions are then made and tested at several temperatures to generate a database to which equation (6) can be fit-ted. Table 1 lists composition regions of six types of commercial glasses evaluated in this study: E-glass (E), float glass (F), low-expansion-borosilicate glass (LE), TV panel glass (TV), fiberglass wool (FW), and con-tainer glass (C).   Borosilicate glass-forming compositions R2O – B2O3 – SiO2 – RaOb (R — Li, Na, K; Ra — Zn, PbO) are investigated. A correlation-regression analysis of the criteria (the silicate modulus, the oxygen number, the structure cohesion factor, the relative molar volumes of the components) affecting the hydrogen permeability of glasses is carried by: 4. Packaging Materials: Glass. INTRODUCTION. Glass has been used for over years, dating to ancient times. Through the years and with more knowledge of its technology, glass has become the most widely used drug packaging material. The origin of the first synthetic glass is unknown; however, Egyptians were known to mold figurines from sand and silicon dioxide.[1].

DIN Soda-lime glass is the most common type of glass that is produced by melting soda, lime, silica, alumina, and small quantities of fining glass in a furnace at temperatures up to ° C. Sheets of glass of soda-lime obtained by pouring a layer of molten glass on the surface of the molten tin.


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volatilization of constituents from borosilicate glass at elevated temperatures... by L. F. Oldfield Download PDF EPUB FB2

Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming volatilization of constituents from borosilicate glass at elevated temperatures. book. Borosilicate glasses are known for having very low coefficients of thermal expansion (≈3 × 10 −6 K −1 at 20 °C), making them more resistant to thermal shock than any other common glass.

Such glass is subjected to less thermal stress and can withstand temperature differentials. Because glass constituents can diffuse out from the glass at elevated volatilization of constituents from borosilicate glass at elevated temperatures.

book temperatures and/or during long-term field deployment, the effect of mobile impurities from the glass on the device layers must be considered. For alkali glasses, impurities (e.g., sodium, potassium, and calcium) can diffuse into the films during processing.

Simax Glass ®, because of its chemical composition and properties, belongs to the group of clear “hard” borosilicate glasses “” characterized by high thermal and chemical stability, as defined by the international standard ISO Borosilicate glass - Properties (or by identical Czech version of the standard _N ISO.

Borosilicate is the material of choice for many industries because of its affordability — especially the biomedical and research industries.

Borosilicate glass remains both clear and strong when exposed to high temperatures. In addition to standard borosilicate, Swift Glass also offers infrared reflecting borosilicate (IRR Borosilicate), also commonly known as a hot mirror. A hot mirror [ ].

The structure of glass 1 Borosilicate glasses. 3 Metastable subliquidus phase separation in silicate, borate and THE STRUCTURE OF BOROSILICATE GLASSES References.

APPENDIX Summary. Samenvatting. Levensbericht. INTRODUCTION The structure of glassCited by: Further Studies in the Annealing of a Borosilicate Glass Sam Spinner and Albert Napolitano Institute for Materials Research, National Bureau of Standards, Washington, D.C.

(Decem ) Timeindex of refraction isotherms for a borosilicate glass in the transformation region have been Size: 6MB. This volatilization of constituents from borosilicate glass at elevated temperatures. book can be explained by sulphate volatilization from the glass melt and is observed for each silicate or borosilicate glass synthesized and at each temperature chosen for the study.

Download: Download full-size image; Fig. Raman spectra of SBNa Cited by: 9. On the structural role of boron in borosilicate glasses Article (PDF Available) in European Journal of Glass Science and Technology Part B Physics and Chemistry of Glasses 55(3) June.

Article Borosilicate Glass: A brief history. From the laboratory standpoint, there are three main tyeps of glass used today; borosilicate, quartz and soda lime or flint glass.

What is borosilicate glass, how is it different from other glasses, and wh. trolled by the temperature ditterentials in the glass, which depend on the relative temperatures of the contents of the equipment and the external surroundings.

Provided borosilicate glass is not subjected to rapid change in temperature, creating undue thermal shock, it can be operated safely at temperatures up to °F (°C).File Size: KB.

Phase separation in borosilicate and alkali earth silicate glasses. Phase separation in borosilicate and other glasses below the liquidus temperature has a significant influence on the properties [1, 2, 3].

Some theoretical background of phase separation is available online in reference [3]. >16 mole% Al2O 3, or >19 mole% Fe2O 3 have been flagged as outside the borosilicate glass concentration envelope.[5,6] Alternative vitrification processes or products are desirable for improved treatment of these wastes.

Promising new low-temperature glasses and glass-ceramics have been proposed based on advanced phosphate formulations. Volatilization of constituents from borosilicate glass at elevated temperatures.

book glass is a glass-type material. The properties of borosilicate glass include four common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below.

The graph bars on the material properties cards further below compare borosilicate glass to other glass and glass. Monitoring Chemical Changes on the Surface of Borosilicate Glass Covers during the Silanisation Process. analyses for the treatment of borosilicate glass covers.

The glass surface was first treated groups.1–3 These OH groups can be dehydrated at temperatures above °C butFile Size: KB. BOROSILICATE GLASS Borosilicate glass, known under trade names such as Pyrex® and Duran®, is widely used in chemical and engineering applications.

This glass is chemically resistant, has a low thermal expansion coefficient and can be used at relatively high Size: KB.

The volatilization of constituents from borosilicate glass at elevated temperatures GT__ The volatilization of constituents from borosilicate glass at elevated. A borosilicate glass hydration at low temperature Keywords: Borosilicate glass, vapor hydration, The absorbance evolution of the SiOH peak at cm-1 as a function of time at different temperatures for SON68 glass hydrated with relative humidity of 95% is shown in Fig.

3(a). The absorbance values were normalized usingFile Size: KB. following materials: Borosilicate glass, (BSG), PTFE, PVDF, FEP, Alumina Ceramic (AC) and Platinum Iridium (PI).

The following table is a guide to help with the queries regarding liquid compatibility. Please note that these tables are just a guide.

We recommend that if there is a question regardingFile Size: 79KB. External links. Crown glass - Wikipedia; SCHOTT AG SCHOTT AG is a German glass manufacturer.

SCHOTT also publishes a glass catalog (SCHOTT Optical Glass Datasheets), which is a standard reference for the properties of many optical glasses. Borosilicate glass is a type of glass with silica and boron trioxide as the main glass forming constituents.

Borosilicate glasses are known for having very low coefficients of thermal expansion (~3 × 10 −6 K −1 at 20 °C), making them resistant to thermal shock, more so than any other common glass. calcium sodium borosilicate, calcium aluminum borosilicate, calcium titanium borosilicate, silver borosilicate, and zinc the other glass constituents, as nitrates, was then added.

electric furnace to a bubble-free glass in 2 h at temperatures varying from to °C (depending on the composition ofFile Size: KB.

The E a values obtained in these experiments are close the ionic type conduction in these glass networks. The variation of E a with temperature and composition of silicate and sodium borosilicate.

The relation between the chemical composition and the density of silicate glass melts at temperatures of °C to °C was analyzed statistically. The analysis was founded on all available glass density values in the SciGlass information system for glasses containing more than 40 mol% silica, less than 40 mol% boron oxide, varying.

concentrated phosphoric acid and strong caustic solutions at elevated temperatures. However, at ambient temperatures caustic solutions up to 30% concentration can be handled by borosilicate glass without difficulty.

Borosilicate glass can be classified in accordance with the relevant test methods as follows (see also ISO and EN ):File Size: KB. some data shows that rear- or back-illuminated CMOS sensors are sensitive down past nm in the ultraviolet.

Non-glass optics. Presumably glass lenses will cut off anything below nm, so to take full advantage of this we might consider using a pinhole instead of a glass lens.

Luckily webcam lenses just unscrew. Please post here if you try this. Borosilicate glass is chemically resistant, has a low thermal expansion coefficient and can be used at relatively high temperatures. It is available in many forms and sizes such as rod, tube, plate and as machined or hot formed components.

Table 1. Typical properties of borosilicate glass. Young's Modulus. Max. Use Temperature. It can be used for all applications and is most commonly used to package water for injection, UN-buffered products, chemicals, sensitive lab samples, and samples requiring sterilization.

All lab glass apparatus is generally Type I borosilicate glass. Examples of Type I borosilicate glass include Corning® Pyrex® and Wheaton, and Its low coefficient of thermal expansion, high thermal shock resistance and ability to work at temperatures up to ° C for a long period of time, make this type of glass particularly suitable for use in stable temperature conditions.

So borosilicate glass is also called heat resistance glass. Is suitable for operation at low temperatures. BK7 optical glass BK7 is a very popular crown glass. Most glass makers produce this glass under slightly different names. Analogs of BK7 glass produced by different makers.

R7T7 & SON68 Glasses A complex borosilicate glass comprising more than 30 oxides oxide % (w) 29SiO 2 27Al 2O 3 11B 2O 3 6,7Li 2O 23Na 2O 43CaO ZrO 2 ZnO Fe 2O 3 P 2O 5 NiO Cr 2O 3 Fission Products File Size: 5MB.

glass by a pharmaceutical product having pH of Authors have used three type-I borosilicate glass vials from two different vendors of which two vials (ammonium sulfate treated and the other one un-treated) were kept in contact with the product with pH of and the remaining were used as a control.

Vials were stored under 2 differentFile Size: KB. This article describes the use of an accelerated extractable procedure for borosilicate glass containers.

The procedure, which is very similar to a protocol developed by a PDA Task Force, includes the monitoring of Si, Na, K, Al, Ba, Ca, Mg, Fe, and Zn in the extracts as well as measurements of pH change and total by: glass.

The chemical constituents (wt%) of the fused-silica glass are SiO2, and those of the soda-lime glass are 70^72 SiO2,13^15Na2O, and 8^12 CaO.

Rectangular solid specimens were made of the glasses. The thickness L, height H, width W, and mass m, of the glass sheet specimens used are listed in table 1.

3 Results and discussion. Borosilicate glass (BSG) is a class of moderate-refractive-index glass comprised of silicon dioxide and boron oxide. Borosilicate glasses are known for having very low coefficients of thermal expansion, which makes them resistant to thermal shock.

in the extent of Cs volatility. For example, the presence of Al, Ti, or Zn either in waste or as constituents of glass forming chemicals are known to suppress Cs volatility, while the presence of chloride and technetium in waste accelerate volatilization of Cs, The nature.

Thermal Expansion of Borosilicate Glass, Zerodur, Zerodur M, and Unceramized Zerodur at Low Temperatures J.H. Burge, T. Peper, and S.F. Jacobs, Optical Sciences Center, Univ.

of Arizona, Tucson, AZ Abstract Current plans for space exploration are calling for more information about materials—at ever lower by: Low Expansion Borosilicate Glass (ASTM E Type I Class A) Low expansion borosilicate is a grade of borosilicate glass.

The graph bars on the material properties cards below compare low expansion borosilicate to other glass and glass-ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. Table 1. Borosilicate Glass Characteristics Young’s Modulus (E) GPa Thermal Diffusivity (D) x m2/s CTE (α) ppm/K Specific Heat (c) J/kg °C The LSST mirror is a cast borosilicate mirror with a 28mm thick faceplate.

The relevant material properties of borosilicate are provided in table 1. The material has bothFile Size: 1MB. Actually glass doesn't have any such thing as a melting point.

Also borosilicate glass doesn't even have a higher softening temperature than conventional soda-lime glass. The main advantage is the low thermal expansion coefficient. It makes borosilicate glass less sensitive to thermal gradients and thermal shock. Regards, Herbert. temperatures increase with increasing amount of SiO2 High-temperature viscosity and density of alumino-borosilicate glasses as a model system for comercial E-glass Ceramics − Silikáty 52 (3) () Table 1.

The composition of studied glasses based on the average content of major oxides in the E-glass, the step Δ of change in the. @article{osti_, title = {Toxicity characteristic leaching procedure (TCLP) pdf of crankcase oils and oil residues from the electric utility industry. Final report}, author = {Khare, M}, abstractNote = {The electric utility industry annually generates more than 22 million gallons of used oil, which is mostly recycled as boiler fuel.

For borosilicate glass, the annealing temp download pdf F and the strain point isso your garaging temp would be F. And now, the Great Annealing Debate! Remember that annealing is the process of keeping the glass hot enough so that the molecules can “straighten out” after being mixed and allowing the strain to release.These test methods cover ebook quantitative chemical analysis of soda-lime and borosilicate glass compositions for both referee and routine analysis.

This would be for the usual constituents present in glasses of the following types: (1) soda-lime silicate glass, (2) soda-lime fluoride opal glass, and (3) borosilicate glass.