The effect of TiO2 on the thermal stability and structure of high acidity slag for mineral wool production

Pang, Zhuogang; Xiao, Xing; Zheng, Jianlu; Du, Yueli; Ren, Shan; Lv, Ming

doi:10.1016/j.jnoncrysol.2021.121071

Cited by 17 publications

(7 citation statements)

References 30 publications

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“…The sinter strength was improved by the bonding phase agglomeration during cooling. 26) The peak area of the DSC curves corresponded to where L is liquid phase. The ratio of C 2 F increased in the CF and C 2 F system, which would decline the eutectic temperature of CF and C 2 F. The DSC curves of SFCA was showed in Fig.…”

Section: Thermal Analysismentioning

confidence: 99%

Effect of BaO on Formation Mechanisms of Silico-ferrite of Calcium and Aluminum

Xing

et al. 2022

ISIJ Int.

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Silico-ferrites of calcium and aluminum (SFCA) are formed during the sintering process, and their changes are critical to the quality of the sinter. Aiming to further clarify the effect of BaO (0 mass%, 1 mass%, 2 mass%, 3 mass%, 5 mass%, 7 mass%, and 9 mass%) on the bonding process of SFCA. In this work, X-ray diffraction (XRD), scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS), thermogravimetry-differential scanning calorimeter (TG-DSC) were used to analysis the formation mechanisms of SFCA. The results indicated that the main bonding phase was SFCA. In addition, SFCA-I, CF, C 2 F, and silicate existed in the BaO-free sinter. Adding a small amount of BaO (up to 2 mass%) could increase the decomposing temperature of SFCA and increase the formation of the needle-like SFCA. With the increase of BaO adding from 2 to 9 mass%, the BaFe 12 O 19 (FB) formed could reduce the decomposing temperature of SFCA, which deteriorated the quantity of sinter. And, BaO can promote the formation of C 2 F in the CF and C 2 F system, which decreased the eutectic melting temperature of CF and C 2 F.

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Section: Thermal Analysismentioning

confidence: 99%

Effect of BaO on Formation Mechanisms of Silico-ferrite of Calcium and Aluminum

Xing

et al. 2022

ISIJ Int.

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“…The Raman spectra results were deconvoluted by Gaussian–deconvolution method and the Raman band between 620 and 1100 cm −1 is shown in Figure 9 . According to previous study, [ 19–23 ] the characteristic peaks less than 700 cm −1 is attributed to the Ti–O vibration of Ti 4+ in sixfold coordination, and the spectra pattern around 720 cm −1 is stand for the O–Ti–O‐deformation‐stretching vibration in chain or sheet unit or both. The peaks near 780 and 850 cm −1 are related to the Ti–O 2− ‐stretching vibration in TiO 4 4− monomer and − O–Ti–O − ‐stretching vibration in Ti 2 O 6 4− chain unit, respectively.…”

Section: Resultsmentioning

confidence: 84%

Influence of Cr₂O₃ on the Viscous Flow Behavior and Structure of Cr‐Containing Molten Titanium Slag

Zeng

Wang

2023

steel research int.

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Herein, the influence of Cr2O3 on the viscous flow behavior and structure of Cr‐containing molten titanium slag is investigated in this work. The melting and viscosity properties are studied by hemisphere method and rotating cylinder method, respectively. In addition, the structure of Cr‐containing molten titanium slag is investigated by Raman spectroscopy. It is shown in the results that the melting temperature and viscosity both increase with the increase of Cr2O3 content. The activation energy for viscous flow increases with increasing Cr2O3 content, which is in the same trend as viscosity. When the Cr2O3 content increases from 0% to 3%, the simpler 6‐coordinated Ti4+ and TiO44− monomer unit transformed into more complex O–Ti–O deformation and Ti2O64− chain unit. Furthermore, the fraction of relatively complex silicate structural units shows an increasing trend. Cr2O3 behaves as a network former and enhances the degree of polymerization of network structure, and the variation of Cr‐containing molten titanium slag structure is consistent with the increasing trend of viscosity.

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“…In contrast, at greater SiO2 concentrations, the Er 3+ ions are located at defects, vacancies or on the surface whereas the samples with higher content of TiO2 exhibit stronger emissions [31]. This occurrence is most likely caused by the presence of TiO2 which serves as network modifier [18,32,33] to increase the number of non-bridging oxygen (NBO) bonds available to be bonded with RE ions.…”

Section: Nanofibers' Diameter Range (Nm)mentioning

confidence: 99%

“…In comparison to SiO 4+ (0.41 Å), TiO 4+ (0.61 Å) has a greater ionic radius [16,18,19]. As a result, the Ti-O bond's distance is greater (around 1.7-2.3 Å [20]) compared to Si-O bond at ~1.60 Å [18,21]. A longer molecule is produced when there is a greater distance separating Ti particle.…”

Section: Nanofibers' Diameter Range (Nm)mentioning

confidence: 99%

Morphological, Structural and Optical Properties of Er3+-Doped SiO2-TiO2 Nanofiber

Siti Nurbaya Supardan,

Rozan Mohammad Yunus,

Suraya Ahmad Kamil

et al. 2024

IJNeaM

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SiO2 and TiO2 are often used in optical film due to their chemical stability and they have been proven as a favourable host for rare earth ions. Nanofiber has been widely studied because it possesses a high surface area per unit mass as well as low-cost production. In this study, sol-gel and electrospinning methods were used to synthesize and fabricate Er3+-doped SiO2-TiO2 nanofiber with different ratios of SiO2/TiO2, respectively. The morphological, structural, and optical properties of the nanofiber were studied. The FESEM result shows that the produced fibers have diameters between 67 to 538 nm. The FTIR spectra imply that the main structure of the nanofiber remains unchanged despite the increasing of TiO2 content in the host matrix. The obtained XRD results indicate that all samples correspond to the amorphous phase. Besides, the optical transparency of all the fabricated samples demonstrated a high transmittance (88% to 93%) which was ideal for photonic applications. The PL spectra showed strong green emission peaks associated to 2H11/2  4I15/2 of Er3+ transitions under an excitation wavelength of 350 nm.

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The effect of TiO2 on the thermal stability and structure of high acidity slag for mineral wool production

Cited by 17 publications

References 30 publications

Effect of BaO on Formation Mechanisms of Silico-ferrite of Calcium and Aluminum

Effect of BaO on Formation Mechanisms of Silico-ferrite of Calcium and Aluminum

Influence of Cr₂O₃ on the Viscous Flow Behavior and Structure of Cr‐Containing Molten Titanium Slag

Morphological, Structural and Optical Properties of Er3+-Doped SiO2-TiO2 Nanofiber

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The effect of TiO2 on the thermal stability and structure of high acidity slag for mineral wool production

Cited by 17 publications

References 30 publications

Effect of BaO on Formation Mechanisms of Silico-ferrite of Calcium and Aluminum

Effect of BaO on Formation Mechanisms of Silico-ferrite of Calcium and Aluminum

Influence of Cr2O3 on the Viscous Flow Behavior and Structure of Cr‐Containing Molten Titanium Slag

Morphological, Structural and Optical Properties of Er3+-Doped SiO2-TiO2 Nanofiber

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Influence of Cr₂O₃ on the Viscous Flow Behavior and Structure of Cr‐Containing Molten Titanium Slag