Journal ArticleDOI
Sintering of Low‐Density Glasses: II, Experimental Study
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TLDR
In this paper, densification rates for three classes of porous glass materials are reported for soot preforms made by flame hydrolysis, silica gel, and phase-separated and leached borosilicate glass.Abstract:
Densification rates are reported for 3 classes of porous glass materials: soot preforms made by flame hydrolysis, silica gel, and phase-separated and leached borosilicate glass. Viscosity values obtained by fitting the densification data to the theory of Part I of the present study are in reasonable agreement with viscosity measured by beam bending using fully sintered glass of the same type.read more
Citations
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Theory of sintering: from discrete to continuum
TL;DR: In this paper, a promising approach is connected with the use of continuum mechanics, which has been successfully applied to the analysis of compaction of porous bodies, based upon the theories of plastic and nonlinear-viscous deformation of porous body.
Journal ArticleDOI
Glass-ceramics: Their production from wastes—A Review
TL;DR: A review of glass-ceramics from waste using different processing methods is described comprehensively in this article, covering R&D work carried out worldwide in the last 40 years, revealing that considerable knowledge and expertise has been accumulated on the process of transformation of silicate waste into useful glassceramic products.
Journal ArticleDOI
Preparation of glass by sintering
TL;DR: In this article, a classification of sintering processes includes: (a) sinterting of premelted and pulverized glasses; (b) Sintering of chemically treated glass; (c) sinting without melting; (d) sincing with melting; and (e) Sincing without, or simultaneously with, melting.
Journal ArticleDOI
Fragmentation of magma during Plinian volcanic eruptions
TL;DR: In this paper, the authors show that the volume of vesicles (gas) to that of glass (liquid) in pumice clasts reflects the degassing and dynamic history experienced by a magma during an explosive eruption.
Journal ArticleDOI
Current understanding and future research directions at the onset of the next century of sintering science and technology
TL;DR: Sintering and accompanying microstructural evolution is inarguably the most important step in the processing of ceramics and hard metals as mentioned in this paper, where an ensemble of particles is converted into a coherent object of controlled density and microstructure at an elevated temperature (but below the melting point) due to the thermodynamic tendency of the particle system to decrease its total surface and interfacial energy.
References
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Journal ArticleDOI
Optical Absorption of the Transition Elements in Vitreous Silica
TL;DR: In this paper, a series of high-quality silica glasses doped with 0.01 to 0.1 wt% of each transition element (V through Cu) was prepared by a vapor hydrolysis technique.
Journal ArticleDOI
Properties of some vycor‐brand glasses
TL;DR: In this article, the physical and chemical properties of Vycor-brand glass No. 790 and No. 991 are discussed, and the intermediate porous glass and a translucent or white opaque form of the final 96% silica glass made by the Multiform process are briefly described.
Journal ArticleDOI
Experimental Evaluation of Beam-Bending Method of Determining Glass Viscosities in the Range 108 to 1015 Poises
TL;DR: In this paper, the beam-bending method was used to determine the viscosity of a glass by the viscous bending of a simple beam, compared with the fiber-elongation technique.
Patent
Method of making a transparent article of silica
TL;DR: Finely divided silica is produced by the decomposition of a hydrolyzable compound of silicon, such as silicon chloride or fluoride, by vaporizing it into a gas flame.
Journal ArticleDOI
Pore growth during the initial stages of sintering ceramics
O.J. Whittemore,J.J. Sipe +1 more
TL;DR: In this article, the authors measured changes in pore size distribution during initial stage sintering of compacts of submicron size particles of several oxides, including Magnesia and ferric oxide.