Glass-ceramics: Their production from wastes—A Review

Rawlings, R. D.; Wu, Jeremy; Boccaccını, Aldo R.

doi:10.1007/s10853-006-6554-3

Cited by 483 publications

(307 citation statements)

References 129 publications

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“…Glass ceramic method has been also used for the disposal of a wide diversity of nonnuclear inorganic wastes originated in both industrial and mineral processes [13]. In this case, wastes are transformed into valuable products for subsequent use as ceramic floor tiles, abrasives or concrete additives.…”

Section: Introductionmentioning

confidence: 99%

Effect of particle size on kinetics crystallization of an iron-rich glass

2008

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The effect of glass particle size on the crystallization kinetics of an iron-rich glass from a nickel leaching waste has been investigated by means of differential thermal analysis (DTA). The results show that the crystallization of a pyroxene phase occurs by bulk nucleation from a constant number of nuclei. The crystallization mode and the dimensionality of crystals are strongly dependent of the glass particle size, being 100µm the critical size. Glass fractions with particle size >100µm show three-dimensional crystals growth controlled by diffusion whereas a particle size <100µm leads to an interface reaction mechanism with two-dimensional growth of crystals.

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Section: Introductionmentioning

confidence: 99%

Effect of particle size on kinetics crystallization of an iron-rich glass

2008

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“…Devitrification is a phenomenon of both fundamental interest (2, 3) and practical importance (4)(5)(6)(7)(8)(9)(10). Indeed, the prediction and avoidance or control of devitrification represent major formulation issues in materials science, arising for both metallic (4-6) and network glasses (7,8) as well as glass ceramics (9, 10).…”

mentioning

confidence: 99%

Avalanches mediate crystallization in a hard-sphere glass

Sanz

Valeriani

Zaccarelli

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

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By molecular-dynamics simulations, we have studied the devitrification (or crystallization) of aged hard-sphere glasses. First, we find that the dynamics of the particles are intermittent: Quiescent periods, when the particles simply "rattle" in their nearest-neighbor cages, are interrupted by abrupt "avalanches," where a subset of particles undergo large rearrangements. Second, we find that crystallization is associated with these avalanches but that the connection is not straightforward. The amount of crystal in the system increases during an avalanche, but most of the particles that become crystalline are different from those involved in the avalanche. Third, the occurrence of the avalanches is a largely stochastic process. Randomizing the velocities of the particles at any time during the simulation leads to a different subsequent series of avalanches. The spatial distribution of avalanching particles appears random, although correlations are found among avalanche initiation events. By contrast, we find that crystallization tends to take place in regions that already show incipient local order.colloidal glasses | ordered solid | amorphous solid | dynamic heterogeneities G lasses are formed from the supercooled liquid state when motion is arrested on the scale of the particle diameter. Such states are thermodynamically unstable and may crystallize during, or shortly after, the initial quench. (This is the usual fate of so-called "poor" glass formers.)Computer simulations have shown that, in such cases, crystallization readily proceeds by a sequence of stochastic micronucleation events that enhance the mobility in neighboring areas, leading to a positive feedback for further crystallization (1). Importantly, however, crystallization can also arise in mature, well-formed glasses after a long period of apparent stability. The microscopic mechanism of this process, known as "devitrification," remains elusive. Here, we simulate the dynamics of a mature hard-sphere glass and find that crystallization is associated with a series of discrete avalanche-like events characterized by a spatiotemporal burst of particle displacements on a subdiameter scale. The locations of these avalanches cannot be predicted from the prior structure of the glass, and they vary among replicate runs that differ only in initial particle velocities. Each avalanche leads to a sharp increase in crystallinity, but remarkably the crystallizing particles are primarily not those that participated in the avalanche itself. Instead, they tend to lie in nearby regions that are already partially ordered. We argue that a structural propensity to crystallize in these regions is converted into actual crystallinity by small random disturbances provided by the displacement avalanche. Although spontaneous rather than externally imposed, this pathway may relate to designed crystallization protocols such as oscillatory shear.Devitrification is a phenomenon of both fundamental interest (2, 3) and practical importance (4-10). Indeed, the prediction and avoidance...

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“…During the production of foamed glass, finely ground glass granules are mixed with a suitable amount of the foaming agent. Then, the whole substance is heated evenly and maintained at a constant temperature [4]. Over 600°C, the melting glass surrounds and closes the particles of the foam substance.…”

Section: Strength Properties Of Foamed Glassmentioning

confidence: 99%

“…Foamed glass usually has closed cells, and it is made of recycled glass, i.e., waste container glass [4]. Glass containers are usually made from soda-lima glass, also called soda-limesilica (SLS) glass that represents 90% of total worldwide glass production.…”

Section: Introductionmentioning

confidence: 99%

Limit load and failure mechanisms of soda lime glass foam

et al. 2018

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Foamed glass is widely used in the industry as an insulating material. However, its mechanical properties are not well-investigated yet. Foamed glass is produced from glass waste that causes discrepancy in mechanical properties of the final product. This paper shows a way to increase the limit of the load capacity of foamed glass, which is very fragile and sensitive to mechanical and thermal loading conditions. In this paper, three different methods of load application on cellular glass structure (rough contact, resin and flour interfaces) and their influence on failure mechanisms were investigated in detail. The results of numerical analyses, based on finite elements method and compression strength tests using the digital image correlation method, indicate that the overall strength of the material is limited by boundary effects. A careful adjustment of the interface property is the main factor to draw useful conclusions and to extend load limits of cellular glass in engineering applications.

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Glass-ceramics: Their production from wastes—A Review

Cited by 483 publications

References 129 publications

Effect of particle size on kinetics crystallization of an iron-rich glass

Effect of particle size on kinetics crystallization of an iron-rich glass

Avalanches mediate crystallization in a hard-sphere glass

Limit load and failure mechanisms of soda lime glass foam

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