Preparation of magnetic glass-ceramics by crystallization of ternary eutectic Li2O-MgO-SiO2 system reformed with some di-and trivalent oxides

Salman, Saad; Salama, S.N.; Mahdy, Ebrahim A.

doi:10.1016/j.ceramint.2018.05.079

Cited by 12 publications

(6 citation statements)

References 33 publications

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“…As listed in Table 4, with increasing magnetite content from 10 to 65 wt.%, coercivity of glass ceramics decreases from 273.64 to 171.25 Oe. Remanence magnetization (Mr) of glass ceramics is lower than saturation magnetization and is strongly affected by microstructure and particle size of magnetite 3,4 . It can be seen from Table 4 that with increasing magnetite content, the remanence magnetization generally shows an increase trend.…”

Section: Resultsmentioning

confidence: 99%

“…Remanence magnetization (Mr) of glass ceramics is lower than saturation magnetization and is strongly affected by microstructure and particle size of magnetite. 3,4 It can be seen from Table 4 that with increasing magnetite content, the remanence magnetization generally shows an increase trend.…”

Section: Magnetic Properties Of Glass Ceramicsmentioning

confidence: 97%

“…Magnetic glass ceramics are composed of a certain amount of magnetic phase and residual glass matrix, which have been widely used in drug delivery, cell separation, and MRI contrast agents. [1][2][3][4][5][6] In addition, magnetic glass ceramics also have potential applications in killing cancerous cells by magnetic induction hyperthermia. 1 At present, magnetic glass ceramics are mostly prepared by crystallization method from parent glass with different compositions.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of magnetically controllable glass ceramics with completely dense microstructure by hot pressing

Hou

Wang

Zhang

et al. 2021

Int J Applied Ceramic Tech

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Completely dense magnetite‐based aluminosilicate glass ceramics with adjustable magnetic properties were successfully synthesized by method of hot pressing. The influences of sintering conditions and magnetite contents on magnetic properties and microstructure of samples were analyzed. It was found that increases in sintering temperature and time could improve the densification degree of samples. However, precipitation of crystalline phases from glass would worsen the densification of samples. The optimum parameters of hot pressing were 950°C for 1 h, under which condition, the glass ceramics containing 10–65 wt.% magnetite showed a fully dense microstructure. As the magnetite content increased from 10 to 65 wt.%, magnetization and area of hysteresis loops of glass ceramics increased, while coercivity showed an opposite trend. However, when the magnetite content increased to 70 wt.%, pores appeared and the degree of densification decreased.

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Section: Resultsmentioning

confidence: 99%

Section: Magnetic Properties Of Glass Ceramicsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Fabrication of magnetically controllable glass ceramics with completely dense microstructure by hot pressing

Hou

Wang

Zhang

et al. 2021

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

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“…It would be attractive for a better future of waste utilization both at home and abroad. [11][12][13] Since the early 1960s in Russia, many alternative ways have been developed to manufacture high-value glass-ceramics, including the melting-sintering [14][15][16] and the sintering-crystallization method. [14,17] By melting-sintering, a variety of ground materials were melted in a furnace, put into the mold and subsequently annealed.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, extensive studies have been carried out on how to convert various tailings or residues from tailings as raw material in terms of their properties to value‐added glass‐ceramics with both glass phase and crystal phase by different heat treatments. It would be attractive for a better future of waste utilization both at home and abroad [11–13] . Since the early 1960s in Russia, many alternative ways have been developed to manufacture high‐value glass‐ceramics, including the melting‐sintering [14–16] and the sintering‐crystallization method [14,17] .…”

Section: Introductionmentioning

confidence: 99%

Preparation and Crystallization of Magnetic Glass‐Ceramics from the Residues after Sulfur Release and Iron Recovery from Copper Ore Tailings with Varied CaO Content

et al. 2021

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To comprehensively reuse copper ore tailings (COT), the fabrication of glass-ceramics by the direct sintering method was investigated, where the residues after sulfur release and iron recovery from copper ore tailings were used as raw materials. The effect of the CaO added on the fabrication of glass-ceramics was emphasized. After analysis of chemical composition and thermodynamics, crystallization kinetics were analyzed by Differential Scanning Calorimetry (DSC) and fitted to the Kissinger equation. The crystal phase and microstructure of sintered glass-ceramics heated between 1080 °C and 1100 °C were estimated by X-Ray diffraction analysis (XRD) and Scanning Electron Microscopy (SEM), respectively. Furthermore, the effects of the addition of CaO on the properties of the sintered glass-ceramics have been discussed. The results showed that the magnetic glass-ceramics were sintered by the residues successfully, the color of which was lighter than that of glassceramics sintered by raw materials before iron recovery. According to the XRD analysis, hedenbergite, wollastonite and sekaninaite were formed with traces of maghemite and quartz. In terms of crystallization kinetics and sintering results, a decrease in the activation energies of crystallization and in sintering temperature were observed for an increase in the addition of CaO of up to 10 wt.%. Moreover, the properties of the sintered glass-ceramics, including bulk density, linear shrinkage and flexural strength, were enhanced, while water absorption and true density were reduced with the increase of the amount of CaO added.

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Silicate Minerals

Hashizume

2022

NIMS Monographs

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Preparation of magnetic glass-ceramics by crystallization of ternary eutectic Li2O-MgO-SiO2 system reformed with some di-and trivalent oxides

Cited by 12 publications

References 33 publications

Fabrication of magnetically controllable glass ceramics with completely dense microstructure by hot pressing

Fabrication of magnetically controllable glass ceramics with completely dense microstructure by hot pressing

Preparation and Crystallization of Magnetic Glass‐Ceramics from the Residues after Sulfur Release and Iron Recovery from Copper Ore Tailings with Varied CaO Content

Silicate Minerals

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