Sintering and reactive crystal growth of diopside–albite glass–ceramics from waste glass

Zhang, Wei Yi; Gao, Hong; Xu, Yu

doi:10.1016/j.jeurceramsoc.2011.02.037

Cited by 56 publications

(16 citation statements)

References 28 publications

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“…• C [15][16][17], depending on composition, it can crystallize at lower temperatures. The crystallization temperatures detected in DTA have good agreement with these temperatures.…”

Section: Resultsmentioning

confidence: 99%

Development of Machinable Glass-Ceramics Produced from Vermiculite

2017

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In this study, machinable glass-ceramics were produced from vermiculite and K2CO3, SiO2, Al2O3 and MgF2 as additives by melting process. The starting materials were mixed together and milled in a mill with alumina ball for 2 h. The mixed powders were melted by aluminum crucible at 1500• C. The melted glass was cast into graphite mold, and then it was exposed to crystallization heat treatment for glass-ceramic transformation. The glass-ceramic samples were characterized with X-ray diffraction analysis, scanning electron microscopy, mechanical tests such as hardness, fracture toughness and machinability test. The results indicate that machinability properties can be obtained from vermiculite based glass-ceramic with some additives.

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“…• C [15][16][17], depending on composition, it can crystallize at lower temperatures. The crystallization temperatures detected in DTA have good agreement with these temperatures.…”

Section: Resultsmentioning

confidence: 99%

Development of Machinable Glass-Ceramics Produced from Vermiculite

2017

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“…In these studies sintered glass-ceramics belonging to the pseudo-binary system albite-diopside, which form different percentages of diopside, were used. Later P CR formation was confirmed in other sintered glass-ceramic systems [53][54][55][56][57][58][59][60][61][62], as well as in some new ceramics with high crystallinity [63][64][65]. During sinter-crystallization, processes of densification and crystal phase formation take place in the same temperature interval.…”

Section: Introductionmentioning

confidence: 89%

8. Stress-induced Pore Formation and Phase Selection in a Crystallizing Stretched Glass

Fokin¹,

Karamanov²,

Abyzov³

et al. 2014

Glass

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In the present chapter, we describe results of experimental investigations and theoretical analysis of phase selection and nucleation of pores in small samples of undercooled diopside liquid when it is enclosed by a solid crystalline surface layer. The formation of the surface crystalline layer starts with nucleation and growth of highly dense diopside crystals. At the moment of impingement of these crystals on the sample surface, the crystallization pathway switches from diopside to a wollastonite-like (WL) phase. The origin of such switch can be explained by the fact that the formation of the WL-crystal produces less elastic stress energy than the same amount of diopside. This difference is due to the lower (as compared to diopside) density of the WL-crystal phase, which is closer to the liquid density. The relative content of the two crystalline phases can be changed by varying the sample size. Due to the density misfit the growth of the WL-crystalline layer leads to uniform stretching of the encapsulated liquid. This negative pressure leads finally to the formation of one small pore, which rapidly grows up to a size that almost eliminates the elastic stress and, therefore, dramatically reduces the driving force for further pore nucleation. The nucleation process of the pore is experimentally found to occur in a very narrow range of the relative widths of the surface layer (compared to the sample size) and, consequently, of negative pressures. We consider this fact as an indication that pore nucleation proceeds via homogeneous nucleation. The above-given qualitative explanation of the observed phenomena is corroborated by detailed theoretical calculations of elastic stress fields and their impact on phase selection and pore nucleation. Good qualitative and partly even quantitative agreement between experiment and theory is found. An overview on other systems with similar or related properties is included as well. The findings of this research are quite general because the densities of most glasses significantly differ from those of their iso-chemical crystals. By this reason, the studied phenomena are of high technological significance for the development of different types of glass-ceramic materials and the understanding and control of sinter-crystallization processes. The latter problem is also considered in the present chapter.

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“…CWG, obtained from bottle waste, was used in the preparation of GFG. 133,[159][160][161][162][163][164] Toniolo et al 165 evaluated the potential of using CWG (soda lime) in fly ash-based geopolymers by conducting mechanical, microstructural, and leaching experiments. Concrete samples containing GFG showed no major change in workability compared to control samples.…”

Section: Glass-based Productsmentioning

confidence: 99%

Waste glass in civil engineering applications—A review

Kazmi

Williams

Serati

2019

Int J Applied Ceramic Tech

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Each year, hundreds of thousands of tons of industrial wastes are being stockpiled, landfilled, and disposed of in storages occupying large areas of land that would otherwise be available for productive use. Recycling of such wastes is now becoming of urgent global interest due to an increasing population, the rise in anthropogenic activities, and the need for more efficient resource and waste management systems.Among many wastes, the generation of glass is dramatically increasing, particularly in the municipal, industrial, and construction sectors. In civil engineering, in general, crushed waste glass has been mainly investigated as a substitute for sand and finegrained aggregate in concrete production. In geotechnical engineering, in particular, the application of glass wastes is mainly limited to road pavements or as an additive to different soils for subgrade improvement. While glass wastes are relatively inert and potentially offer several opportunities for recycling as a substitute for diminishing and increasingly expensive sand supplies, their potential use yet remains relatively under-researched. This paper systematically reviews the current status of knowledge on the use of glass wastes in various civil engineering applications and discusses the suitability assessment of waste glass for use as a sustainable alternative to traditional civil engineering materials. K E Y W O R D Saggregate, concrete, recycling, sand, waste glass, waste management

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Sintering and reactive crystal growth of diopside–albite glass–ceramics from waste glass

Cited by 56 publications

References 28 publications

Development of Machinable Glass-Ceramics Produced from Vermiculite

Development of Machinable Glass-Ceramics Produced from Vermiculite

8. Stress-induced Pore Formation and Phase Selection in a Crystallizing Stretched Glass

Waste glass in civil engineering applications—A review

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