by For sale by the Superintendent of Documents, U.S. Govt. Print. Off. in Washington .
Written in English
|Statement||[by] A. Napolitano and E. G. Hawkins.|
|Series||National Bureau of Standards miscellaneous publication, 260., Standard reference materials,, 11, National Bureau of Standards miscellaneous publication ;, 260.|
|Contributions||Hawkins, Earl George, 1912- joint author.|
|LC Classifications||QC100 .U57 no. 260, pt. 11|
|The Physical Object|
|Pagination||vi, 24 p.|
|Number of Pages||24|
|LC Control Number||66060039|
Results obtained for a standard reference glass are compared with previous data. MATERIALS INDEX: lead, silicates Introduction The technique of parallel plate rheometry has been used as a means of providing viscosity-temperature data for glass compositions with potential applications in infrared-transmitting optical fibres(I-4).Cited by: 9. Standard Reference Materials: Viscosity of a Standard Borosilicate Glass | A. Napolitano, E.G. Hawkins | download | B–OK. Download books for free. Find books. , a lead silica; and No. , a borosilicate have been certified for viscosity form to P (poise). The viscosity determinations were made by the rotating cylinder method  at high temperatures, and by the fiber elongation  and beam-bending methods  at the lower temperatures. Recently, a parallel. The viscosity of a soda-lime-silica glass has been measured at the National Bureau of Standards and seven other laboratories. Determinations were made in the range of to poises. The rotating cylinder was used at the higher temperatures ( to C) and the fiber elongation method at the lower temperatures ( to C).
Viscous flow of medieval cathedral glass. Ozgur Gulbiten, John C. Mauro, Xiaoju Guo, Olus N. Boratav. Journal of the American Ceramic Society. Vol. No. 1 (): 5– Viscosity of a Standard Borosilicate Glass. A. Napolitano and E.G. Hawkins. National Bureau of Standards (). Viscosity of a Standard Lead-Silica Glass. A. C / /93 NIST standard reference materials catalog. C Viscosity of a standard lead-silica glass [by] A. Napolitano and E. G. Hawkins. C Homogeneity characterization of NBS spectrometric standards III: white cast iron and stainless steel powder compact / H. Yakowitz, D.L. Vieth, and R.E. Michaelis. Because there are surface tension or kinematic viscosity differences, or both, between the primary standard () and kinematic viscosity standards (), special procedures using master viscometers are required to “step-up” from the kinematic viscosity of the primary standard to the kinematic viscosities of oil standards. Lead glass, commonly called crystal, is a variety of glass in which lead replaces the calcium content of a typical potash glass. Lead glass contains typically 18–40% (by weight) lead(II) oxide (PbO), while modern lead crystal, historically also known as flint glass due to the original silica source, contains a minimum of 24% PbO. Lead glass is often desirable for a variety of uses due to its.
The spindle and head were calibrated for viscosity mea- surement with the NBS SRM Lead-silica glass for which the viscosity-temperature relationship is accurately known. The precision and accuracy of viscosity data are based on the observed precision during replicate measurements of the standard glass SRM An apparatus is described which employs the elongation of a glass fiber under load for the determination of annealing and strain points. The same apparatus is also used by varying the suspended load for the determination of the temperature‐viscosity curve between the annealing range and the softening point of the glass. C Practices for Measuring Viscosity of Glass Above the Softening Point C Standard Test Method for Measuring the Viscosity of Mold Powders Above their Melting Point Using a Rotational Viscometer. D Methods of Testing Varnishes Used for Electrical Insulation. Based on composition, the glass was formulated by adding an average mass% of CaCO3 and mass% of Na2CO3 to mass% of SiO2, which resulted in the production of a green-coloured glass.