Effect of CuO on crystallisation and properties of red R2O–CaO–MgO–Al2O3–SiO2 glass-ceramics from granite wastes

Xue, Jingwen; Zhong, Jiawei; Mao, Yurong; Xu, Changhao; Li, Wen; Huang, Yi-Zhou

doi:10.1016/j.ceramint.2020.06.099

Cited by 26 publications

(6 citation statements)

References 37 publications

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“…As the heat treatment temperature and time increase, the spinel crystal nucleus could be utilized as heterogeneous nucleation phase to improve the formation of mainly the augite phase 32 . Meanwhile, it is also found that the cuprite crystalline phase can appear with increasing heat treatment temperature, which is proposed to promote the red coloration in glass‐ceramics 33 . The element distribution mapping of Cu with different heat treatment stages shows that copper ions in sample A are distributed more uniformly in the glass phase and only a few copper ions are found in the spinel phase, which indicates that copper ions are difficult to enter the spinel crystal by substitution at the temperatures of 600°C.…”

Section: Resultsmentioning

confidence: 99%

“…32 Meanwhile, it is also found that the cuprite crystalline phase can appear with increasing heat treatment temperature, which is proposed to promote the red coloration in glass-ceramics. 33 The element distribution mapping of Cu with different heat treatment stages shows that copper ions in sample A are distributed more uniformly in the glass phase and only a few copper ions are found in the spinel phase, which indicates that copper ions are difficult to enter the spinel crystal by substitution at the temperatures of 600 • C. However, it is found that Cr 3+ and Mn 2+ can exist stably in the spinel at the temperature of 600 • C. When the heat treatment temperature rises to 720 • C, the cuprite can be precipitated in the form of colloid, but there is still no significant Cu-ions enrichment in the spinel and augite phase. The result of the elemental analysis of the sample C-5 demonstrates that the relative content of Cu tends to increase in spinel crystal, indicating that the higher thermal energy enables diffusion of Cuions into the spinel crystal.…”

Section: Crystalline and Microstructural Evolutionmentioning

confidence: 99%

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The direct experimental observation and solidification mechanism of heavy metals in blast furnace slag glass‐ceramics

Guo,

Du,

Wang

et al. 2023

Int J Applied Ceramic Tech

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Glass‐ceramics with high performance and high crystallinity was produced using rare earth blast furnace slag (REBFS) as the primary raw material, along with composite nucleating agents Fe2O3 and Cr2O3. The migration pattern, distribution characteristics, and solidification properties of heavy metals in glass‐ceramics were investigated by the controlled heat treatment. The findings indicated that the heat treatment temperature has a significant effect on the distribution and color of heavy metals in glass‐ceramic. In the crystallized glass‐ceramic, spinel acts as the crystal core for heavy metal solidification, Cr, Cu, and Mn can exist stably in the spinel by the solid solution. The glass‐ceramic was expected to be used as a decorative building material.

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Section: Resultsmentioning

confidence: 99%

Section: Crystalline and Microstructural Evolutionmentioning

confidence: 99%

The direct experimental observation and solidification mechanism of heavy metals in blast furnace slag glass‐ceramics

Guo,

Du,

Wang

et al. 2023

Int J Applied Ceramic Tech

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show abstract

“…), many new compounds are formed and transferred to the tribofilm, including CuO, Fe 2 O 3 , Fe 3 O 4 and other amorphous substances. These metal oxides usually have low shear strength and strong mechanical properties, 35,36 which can protect the metal surface from subsequent wear. Finally, asperities and peaks on the strip surface can be removed by the motion of Cu NPs, which is known as the polishing effect.…”

Section: Discussion Of the Lubrication Mechanismmentioning

confidence: 99%

Water‐based Cu nanofluid as lubricant for steel hot rolling: Experimental investigation and molecular dynamics simulation

Sun

Yang

et al. 2021

Lubrication Science

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The lubrication performance of Cu nanofluid was studied through hot rolling tests and non‐equilibrium molecular dynamics simulation. Results showed that nanofluid with 0.5 wt% Cu nanoparticles possessed the optimal effect in reducing the rolling force, finish rolling thickness and rolled surface roughness. The superior lubrication performance was attributed to the formation of protective tribofilm made of Fe/Cu debris, iron and copper oxides as well as amorphous substances with a thickness of about 24 nm, which avoided the direct contact of steel strip and the roll, thus inhibiting the adhesion wear. Molecular dynamics simulation disclosed that the rolling‐dominated motion pattern of Cu nanoparticles with 74.1% rolling and 25.9% sliding motion contributed to a significant decrease in the friction force. Besides, surface defects including the peaks and valleys were polished and repaired by nanoparticles respectively, thus developing the surface quality of hot rolled products.

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“…The crystalline phases include rod‐like richterite and granular cuprite. The superior flexural strength (167.8 MPa) and Vickers hardness (7.62 GPa) meet the requirements of high‐grade decorative materials 12 …”

Section: Introductionmentioning

confidence: 90%

Recycling of granite sludge for the preparation of high‐strength glazed glass‐ceramics using stepwise sintering

Lu,

Liu,

Zhou

2024

Int J Applied Ceramic Tech

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The reutilization of granite sludge generated in granite cutting and processing possesses economic and ecological benefits. In this study, high‐strength glazed glass‐ceramics were prepared entirely from granite powder using dense sintering and instantaneous glaze firing. The densification and glaze formation are clarified in terms of phase evolution to study their effects on the flexural strength and surface glossiness of the glass‐ceramics. The milling process promotes particle refinement and the removal of colored minerals, thus increasing the powder whiteness and sinterability. After dense sintering at 1100°C, instantaneous glaze firing at high temperatures decreases the flexural strength while greatly increases the surface glossiness of the glass‐ceramics due to the dissolution of quartz and feldspars in the liquid phase. After the acid‐leached powder was densely sintered and fired with a rapid heating of 50°C/min to 1300°C, the pinhole‐free glazed glass‐ceramic has a flexural strength of 112.5 MPa and a surface glossiness of 54.7 GU (glossiness unit), meeting the quality requirements of the bright glazed tiles in the market. The stepwise sintering process provides a simple processing route for recycling granite sludge into decorative construction tiles and high‐temperature glazes, promising the scalable and value‐added utilization of granite sludge.

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Effect of CuO on crystallisation and properties of red R2O–CaO–MgO–Al2O3–SiO2 glass-ceramics from granite wastes

Cited by 26 publications

References 37 publications

The direct experimental observation and solidification mechanism of heavy metals in blast furnace slag glass‐ceramics

The direct experimental observation and solidification mechanism of heavy metals in blast furnace slag glass‐ceramics

Water‐based Cu nanofluid as lubricant for steel hot rolling: Experimental investigation and molecular dynamics simulation

Recycling of granite sludge for the preparation of high‐strength glazed glass‐ceramics using stepwise sintering

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