Effect of the addition of glasses as sintering aids on microstructure and properties of nanoalumina

ABSTRACT Alumina-Glass compositions were prepared to evaluate the effect of glass as sintering aids. The composites showed densification below 1100°C. The highest density values (~95%) were obtained for compositions based respectively on borosilicate (G2 and G3) and soda lime glasses (G4), all [A1] [A2] containing Na in the precursor powder. Samples G1 (K-based) and G5 (no K or Na in the precursor glass powder) presented irregular morphology with the presence of intergranular porosity. The composition G2, G3, and G4 presented uniform morphology corresponding to higher densification.

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Thermophysical Properties of Cement Mortar Containing Waste Glass Powder

Crystals ◽

10.3390/cryst11050488 ◽

2021 ◽

Vol 11 (5) ◽

pp. 488

Author(s):

Oumaima Nasry ◽

Abderrahim Samaouali ◽

Sara Belarouf ◽

Abdelkrim Moufakkir ◽

Hanane Sghiouri El Idrissi ◽

...

Keyword(s):

Thermal Conductivity ◽

Specific Heat ◽

Thermophysical Properties ◽

Glass Powder ◽

Cement Mortar ◽

Soda Lime ◽

Waste Glass ◽

Soda Lime Glass ◽

Volumetric Specific Heat ◽

Waste Glass Powder

This study aims to provide a thermophysical characterization of a new economical and green mortar. This material is characterized by partially replacing the cement with recycled soda lime glass. The cement was partially substituted (10, 20, 30, 40, 50 and 60% in weight) by glass powder with a water/cement ratio of 0.4. The glass powder and four of the seven samples were analyzed using a scanning electron microscope (SEM). The thermophysical properties, such as thermal conductivity and volumetric specific heat, were experimentally measured in both dry and wet (water saturated) states. These properties were determined as a function of the glass powder percentage by using a CT-Meter at different temperatures (20 °C, 30 °C, 40 °C and 50 °C) in a temperature-controlled box. The results show that the thermophysical parameters decreased linearly when 60% glass powder was added to cement mortar: 37% for thermal conductivity, 18% for volumetric specific heat and 22% for thermal diffusivity. The density of the mortar also decreased by about 11% in dry state and 5% in wet state. The use of waste glass powder as a cement replacement affects the thermophysical properties of cement mortar due to its porosity as compared with the control mortar. The results indicate that thermal conductivity and volumetric specific heat increases with temperature increase and/or the substitution rate decrease. Therefore, the addition of waste glass powder can significantly affect the thermophysical properties of ordinary cement mortar.

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The effects of Fe2O3 and Co3O4 on microstructure and properties of foam glass from soda lime waste glasses

Glass Physics and Chemistry ◽

10.1134/s1087659614020023 ◽

2014 ◽

Vol 40 (2) ◽

pp. 173-179 ◽

Cited By ~ 12

Author(s):

S. Abbasi ◽

S. M. Mirkazemi ◽

A. Ziaee ◽

M. Saeedi Heydari

Keyword(s):

Foam Glass ◽

Soda Lime ◽

Microstructure And Properties

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Improved performances of lithium disilicate glass-ceramics by seeds induced crystallization

10.21203/rs.3.rs-48775/v2 ◽

2020 ◽

Author(s):

Ting Zhao ◽

Mei-Mei Lian ◽

Yi Qin ◽

Jian-Feng Zhu ◽

Xin-Gang Kong ◽

...

Keyword(s):

Fracture Toughness ◽

Glass Powder ◽

Glass Ceramics ◽

Lithium Disilicate ◽

Nucleating Agent ◽

Comprehensive Properties ◽

Aesthetic Appearance ◽

Small Crystals ◽

Bimodal Grain Size ◽

Glass Compositions

Abstract Self-reinforced lithium disilicate (Li2Si2O5, LD) glass-ceramics were hot pressing sintered by introducing 5 wt% Li2Si2O5 crystal seeds into two different glass compositions of SiO2-Li2O-P2O5-ZrO2-Al2O3-K2O-La2O3 (7C LD) and SiO2-Li2O-K2O-La2O3 (4C LD). The results show that the seeds play an important role in the crystallization inducement, microstructural and properties improvement of the glass, especially for the glass powder without the nucleating agent of P2O5. The microstructure features a wider bimodal grain size distribution with large rod-like crystals epitaxially grown along the seeds and small crystals nucleated from the glass powder itself, contributes to the improvement of the performance especially the fracture toughness. The specimen of 4C LD glass with the addition of 5 wt.% Li2Si2O5 seeds exhibited the best comprehensive properties with a good flexural strength (396 ± 7 MPa), improved fracture toughness (3.31 ± 0.19 MPa·m1/2) and comparable translucency as IPS e.max. This research will provide a new idea and method for the improvement of the fracture toughness of lithium disilicate glass-ceramics without affecting its aesthetic appearance, and lay the foundation for its clinical applications.

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Kinetics of dissolution of a biocide soda-lime glass powder containing silver nanoparticles

Journal of Nanoparticle Research ◽

10.1007/s11051-013-1447-2 ◽

2013 ◽

Vol 15 (2) ◽

Cited By ~ 4

Author(s):

L. Esteban-Tejeda ◽

A. C. da Silva ◽

S. R. Mello-Castanho ◽

C. Pacharroman ◽

J. S. Moya

Keyword(s):

Silver Nanoparticles ◽

Glass Powder ◽

Soda Lime ◽

Soda Lime Glass ◽

Kinetics Of Dissolution ◽

Kinetics Of

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Effect of Compound Additives of Li2O-B2O3-SiO2 Glass and LiF on the Properties of CaO-Li2O-Sm2O3-TiO2 Ceramics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.284-286.1349 ◽

2011 ◽

Vol 284-286 ◽

pp. 1349-1352

Author(s):

Liu Shuan Yang ◽

Xiao Wang ◽

Yu Bin Wang ◽

Jin Liang Huang ◽

Fei Long Li

Keyword(s):

Dielectric Properties ◽

Liquid Phase ◽

Sintering Temperature ◽

Liquid Phase Sintering ◽

Sintering Aids ◽

Microstructure And Properties ◽

Sintering Additive ◽

Ceramic Samples

Using Li2O-B2O3-SiO2 (LBS) glass and LiF as a liquid phase sintering additive, the effects of it on the microstructure and properties of 16CaO-9Li2O-12Sm2O3-63TiO2（CLST）ceramics were investigated. The results indicated that the compound sintering aids of LBS glass and LiF reduced the sintering temperature of CLST from 1300 °C to 950°C. Compared with the sample doped single LBS glass, the optimum dielectric properties, Kr=81, Tanδ=0.0073 could be obtained when the CLST ceramic samples doped 3 wt% LBS glass and 0.25 wt% LiF were sintered at 950°C for 3 h.

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Effect of sintering aids on microstructure and properties of textured SiC ceramics prepared in 6 T

Journal of Asian Ceramic Societies ◽

10.1080/21870764.2020.1848035 ◽

2020 ◽

pp. 1-11

Author(s):

Zhigang Yang ◽

Ziqiang Yin ◽

Zhijia Zhao ◽

Jianbo Yu ◽

Zhongming Ren ◽

...

Keyword(s):

Sintering Aids ◽

Microstructure And Properties ◽

Sic Ceramics

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Stabilization of Clay with Waste Soda Lime Glass Powder

Procedia Engineering ◽

10.1016/j.proeng.2016.08.705 ◽

2016 ◽

Vol 161 ◽

pp. 600-605 ◽

Cited By ~ 15

Author(s):

Hanifi Canakci ◽

Aram AL-Kaki ◽

Fatih Celik

Keyword(s):

Glass Powder ◽

Soda Lime ◽

Soda Lime Glass

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Improved performances of lithium disilicate glass-ceramics by seed induced crystallization

Journal of Advanced Ceramics ◽

10.1007/s40145-021-0463-4 ◽

2021 ◽

Author(s):

Ting Zhao ◽

Mei-Mei Lian ◽

Yi Qin ◽

Jian-Feng Zhu ◽

Xin-Gang Kong ◽

...

Keyword(s):

Fracture Toughness ◽

Glass Powder ◽

Glass Ceramics ◽

Lithium Disilicate ◽

Nucleating Agent ◽

Comprehensive Properties ◽

Aesthetic Appearance ◽

Small Crystals ◽

Bimodal Grain Size ◽

Glass Compositions

AbstractSelf-reinforced lithium disilicate (Li2Si2O5, LD) glass-ceramics were hot pressing sintered by introducing 5 wt% Li2Si2O5 crystal seeds into two different glass compositions of SiO2-Li2O-P2O5-ZrO2-Al2O3-K2O-La2O3 (7C LD) and SiO2-Li2O-K2O-La2O3 (4C LD). The results show that the seeds play an important role in the crystallization inducement, and microstructural and property improvement of the glass, especially for the glass powder without the nucleating agent of P2O5. The microstructure features a wider bimodal grain size distribution with large rod-like crystals epitaxially grown along the seeds and small crystals nucleated from the glass powder itself, contributing to the improvement of the performance especially the fracture toughness. The specimen of 4C LD glass with the addition of 5 wt% Li2Si2O5 seeds exhibited the best comprehensive properties with a good flexural strength (396±7 MPa), improved fracture toughness (3.31±0.19 MPa·m1/2), and comparable translucency as IPS e.max. This research provides a new idea and method for the improvement of the fracture toughness of lithium disilicate glass-ceramics without affecting its aesthetic appearance, and lays the foundation for its clinical applications.

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