Sol-gel Preparation and Infrared Radiation Property of Boron-substituted Cordierite Glass-ceramics

Wang, Shuming; Kuang, Fenghua

doi:10.1016/s1005-0302(10)60070-9

Cited by 24 publications

(6 citation statements)

References 10 publications

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“…1, the MAS1B glass specimen has slightly higher crystallization peak and glass transition temperatures compared to the MAS5C glass specimen, representing the higher viscosity of the mentioned glass. In this case, the tendency to crystallize has decreased due to the role of the B 2 O 3 additive as a network former in the structure [29][30][31]. It has also been reported that this behavior is attributed to the glass-forming ability of B 2 O 3 .…”

Section: Crystallization Behavior and Crystalline Phase Evolutionmentioning

confidence: 82%

Crystallization behavior and structural evaluation of cordierite base glass-ceramic in the presence of CaO and B2O3 additives

Ghahsareh

rezvani

2022

Synth. Sinter.

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The purpose of the present work is to highlight the role of CaO and B2O3 additives on the crystallization behavior and microstructural properties of stoichiometric cordierite glass-ceramics using differential thermal analysis (DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Vickers micro-hardness and scanning electron microscopy (SEM). The results show that the presence of B2O3 and CaO in the initial glass led to the precipitation of only one exothermic peak (α-cordierite: Mg2Al4Si5O18). During the heat treatment process, the presence of calcium oxide favors crystallization of anorthite (CaAl2Si2O8) besides α-cordierite phase. It is worth mentioning that, CaO and B2O3 additives strongly encourage the formation of α-cordierite and have the opposite effect on the crystallization of μ-cordierite. In order to determine the effect of crystallization and B2O3 and CaO additives on the hardness of specimens, the micro-hardness measurement of glasses and glass-ceramics shows that the glass-ceramic containing CaO (MAS5C) exhibits the highest micro-hardness value, which depends on the high crystallinity value in this specimen.

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Section: Crystallization Behavior and Crystalline Phase Evolutionmentioning

confidence: 82%

Crystallization behavior and structural evaluation of cordierite base glass-ceramic in the presence of CaO and B2O3 additives

Ghahsareh

rezvani

2022

Synth. Sinter.

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“…According to a previous study, the best spraying distance for Al 2 O 3 coatings was 110 mm, the best spraying power was 40 kW, and the best coating thickness was 140 µm. In addition, a large number of studies [17,18] have found that doping atoms with different radii will lead to defects in the lattice structure, and a variety of impurity energy levels will be introduced at the lattice defects, which will lead to electron transitions in the valence band, an increase in the number of free carriers, and, in turn, affect the emissivity of the coatings. Al 3+ and Mg 2+ have different radii, and MgO is a good sintering additive for Al 2 O 3 ; thus, Kim et al [19] added MgO to Al 2 O 3 to improve the light transmittance of ceramic pellets.…”

Section: Introductionmentioning

confidence: 99%

Effect of Doping Content of MgO on Solar Absorptivity to IR Emissivity Ratio of Al2O3 Coatings

Zhu

Wang

et al. 2022

Coatings

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High-emissivity coatings are often used on the surfaces of solar probes to block heat from the sun. Therefore, improving the thermal control ability is the standard for determining the quality of the coatings. In this study, MgO was doped into Al2O3 to improve the thermal control ability of the coatings and to analyse the effect of different MgO doping contents. The solar absorptivity to infrared (IR) emissivity ratio (α/ε) was used to evaluate the thermal control ability of the coatings. The results showed that 5 wt.% MgO doping content is the best choice. The main reason for the change in α/ε is related to the doping of MgO, which affects the grain size of Al2O3.

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“…They are considered as one of the most promising materials for use in a wide range of applications including as catalyst carrier materials, 31−33 filtration separation materials, 34,35 refractory materials, 36,37 electronic equipment materials, 38 and infrared radiation materials. 39 However, the application of porous cordierite ceramic as an adsorbent in the removal of metal ions from aqueous solutions has not been reported in literature. In order to expand the application of porous cordierite ceramics, the modification of cordierite ceramics for heavy metal treatment in wastewater was studied in this paper.…”

Section: Introductionmentioning

confidence: 99%

“…Porous cordierite ceramics not only have a porous structure, good thermal shock resistance, and low thermal expansion coefficient but also have the characteristics of good adsorption performance, thin pore wall, and large geometric surface area. They are considered as one of the most promising materials for use in a wide range of applications including as catalyst carrier materials, − filtration separation materials, , refractory materials, , electronic equipment materials, and infrared radiation materials . However, the application of porous cordierite ceramic as an adsorbent in the removal of metal ions from aqueous solutions has not been reported in literature.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Modification of Mullite Whiskers/Cordierite Porous Ceramics for Cu²⁺ Adsorption and Removing

Zhang

Wei

et al. 2020

ACS Omega

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In this paper, mullite whiskers were prepared by a molten salt reaction method based on a porous cordierite ceramic substrate (MC), and the modified mullite whiskers/ cordierite ceramic sample (MCK) was obtained via the silane coupling reaction with γaminopropyl triethoxysilane (KH550). The structural morphology and phase compositions of the MC were characterized by X-ray diffraction and scanning electron microscopy. The surface functional groups of MCK were characterized using Fourier transform infrared spectroscopy, and the result showed that the amino group (−NH 2 ) was successfully grafted onto the surface of cordierite ceramic. X-ray photoelectron spectroscopy analysis successfully showed inclusion of the amino and Cu 2+ adsorption mechanism onto MCK. The adsorption properties of MCK were investigated using Cu 2+ as the target pollutant by varying the experimental conditions such as pH, time, temperature, and initial Cu 2+ concentration. The adsorption was found to be spontaneous, endothermic, and feasible, as indicated by the study of thermodynamic parameters. The adsorption kinetic analysis suggested that the pseudo-second-order kinetic model was best fitted for Cu 2+ adsorption. The adsorption isotherm studies showed that the results of the Freundlich model are more suitable for experimental adsorption data than the Langmuir model. The adsorption−desorption cycle indicated that MCK had good reusability and stability. A novel porous ceramic-based adsorbent with high Cu 2+ adsorption and removal efficiency was fabricated and has potential applications for the metal ion removing field.

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Sol-gel Preparation and Infrared Radiation Property of Boron-substituted Cordierite Glass-ceramics

Cited by 24 publications

References 10 publications

Crystallization behavior and structural evaluation of cordierite base glass-ceramic in the presence of CaO and B2O3 additives

Crystallization behavior and structural evaluation of cordierite base glass-ceramic in the presence of CaO and B2O3 additives

Effect of Doping Content of MgO on Solar Absorptivity to IR Emissivity Ratio of Al2O3 Coatings

Preparation and Modification of Mullite Whiskers/Cordierite Porous Ceramics for Cu²⁺ Adsorption and Removing

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Sol-gel Preparation and Infrared Radiation Property of Boron-substituted Cordierite Glass-ceramics

Cited by 24 publications

References 10 publications

Crystallization behavior and structural evaluation of cordierite base glass-ceramic in the presence of CaO and B2O3 additives

Crystallization behavior and structural evaluation of cordierite base glass-ceramic in the presence of CaO and B2O3 additives

Effect of Doping Content of MgO on Solar Absorptivity to IR Emissivity Ratio of Al2O3 Coatings

Preparation and Modification of Mullite Whiskers/Cordierite Porous Ceramics for Cu2+ Adsorption and Removing

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Preparation and Modification of Mullite Whiskers/Cordierite Porous Ceramics for Cu²⁺ Adsorption and Removing