Glass structure and crystallization via two distinct thermal histories: Melt crystallization and glass crystallization

Baek, Ji-Yeon; Shin, Seung-Ho; Hyun, Sung‐Hee; Cho, Jung‐Wook

doi:10.1016/j.jeurceramsoc.2020.08.036

Cited by 7 publications

(5 citation statements)

References 48 publications

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“…These peaks reflect the phase transformation of dicalcium silicate from γ-Ca 2 SiO 4 (calcioolivine) [54] to α'-Ca 2 SiO 4 taking place at 1120 K (848 • C) according to the literature [53]). This transformation can be taken as evidence of dicalcium silicate formation according to reactions (24) and (25) from anhydrous calcium silicate and anhydrous silica in the presence of a local excess of calcium carbonate. 2Ca 1,5 SiO 3,5 + CaCO 3 = 2Ca 2 SiO 4 + CO 2 (24)…”

Section: Dimension Of Bar Is 10 µM Dimension Of Bar Is 1 µM Dimension...mentioning

confidence: 99%

“…Most of these minerals can be prepared from powdered or compacted mixtures of components containing precursors of calcium, silicon, and sodium oxides as a result of the solid-state or hetero-phase reactions taking place at high temperatures [19][20][21][22][23]. Sodium calcium silicates and calcium silicates can be prepared via crystallization from glass melts [24][25][26]. Wires of CaSiO 3 with an acicular structure grown from the melts may have fine dimensions [27].…”

Section: Introductionmentioning

confidence: 99%

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Composite Powders Synthesized from the Water Solutions of Sodium Silicate and Different Calcium Salts (Nitrate, Chloride, and Acetate)

Safronova,

Sterlikov,

Kaimonov

et al. 2023

J. Compos. Sci.

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Composite powders were synthesized from the water solutions of sodium silicate and different calcium salts (nitrate, chloride, and acetate) at a Ca/Si molar ratio of 1.0. According to the XRD data, all the synthesized powders included hydrated calcium silicate Ca1,5SiO3,5·xH2O (Ca/Si molar ratio = 1.5) and calcium carbonate CaCO3 (Ca/Si molar ratio = ∞). The presence of H2SiO3 or SiO2·xH2O in the synthesized powders was assumed to be due to the difference between the Ca/Si molar ratio of 1.0 specified by the synthesis protocol and the molar ratio of the detected products. Reaction by-products (sodium nitrate NaNO3, sodium chloride NaCl, and sodium acetate NaCH3COO) were also found in the synthesized powders after filtration and drying. According to the XRD data phase composition of all powders after washing four times consisted of the quasi-amorphous phase and calcium carbonate in the form of calcite. Calcium carbonate in the form of aragonite was detected in powders synthesized from calcium chloride CaCl2 and calcium nitrate Ca(NO3)2 before and after washing. Synthesized powders containing reaction by-products and washed powders were used for the preparation of ceramics at 900, 1000, and 1100 °C. The phase composition of the ceramic samples prepared from the washed powders and powder containing NaCl after firing at 900 and 1000 °C consisted of β-wollastonite β-CaSiO3, and, after firing at 1100 °C, consisted of both β-wollastonite β-CaSiO3 and pseudo-wollastonite α-CaSiO3. The phase composition of the ceramic samples prepared from powders containing sodium nitrate NaNO3 and sodium acetate NaCH3COO after firing at 900, 1000, and 1100 °C consisted of calcium sodium silicates, i.e., Na2Ca2Si3O9 (combeite) and Na2Ca3Si2O8. Synthesized and washed composite powders can be used for the preparation of biocompatible materials, in the technology of construction materials, and as components of lunar soil simulants.

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Section: Dimension Of Bar Is 10 µM Dimension Of Bar Is 1 µM Dimension...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Composite Powders Synthesized from the Water Solutions of Sodium Silicate and Different Calcium Salts (Nitrate, Chloride, and Acetate)

Safronova,

Sterlikov,

Kaimonov

et al. 2023

J. Compos. Sci.

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show abstract

“…Therefore, it may be feasible to prepare glass ceramics with controllable magnetic properties by hot pressing the mixture of glass and Fe 3 O 4 powder. In addition, the introduction of hot pressing can also avoid the problems of low densification degree and the presence of uncontrollable crystalline phase in glass ceramics as that obtained by powder‐sintering method 7,19–26 …”

Section: Introductionmentioning

confidence: 99%

“…In addition, the introduction of hot pressing can also avoid the problems of low densification degree and the presence of uncontrollable crystalline phase in glass ceramics as that obtained by powder-sintering method. 7,[19][20][21][22][23][24][25][26] The motivation of this study is that the traditional preparation method of magnetic glass ceramics has the disadvantages of uncontrollable amount and grain size of magnetic phase, uncontrollable type of crystalline phase, and low densification degree. 7,[19][20][21][22][23][24][25][26] In this study, by introducing hot pressing method and adjusting the ratio of magnetic phase to glass phase, magnetically controllable and completely dense glass ceramics can be obtained.…”

Section: Introductionmentioning

confidence: 99%

“…7,[19][20][21][22][23][24][25][26] The motivation of this study is that the traditional preparation method of magnetic glass ceramics has the disadvantages of uncontrollable amount and grain size of magnetic phase, uncontrollable type of crystalline phase, and low densification degree. 7,[19][20][21][22][23][24][25][26] In this study, by introducing hot pressing method and adjusting the ratio of magnetic phase to glass phase, magnetically controllable and completely dense glass ceramics can be obtained. The effects of sintering conditions and Fe 3 O 4 contents on the densification, physical, and magnetic properties of final samples were studied.…”

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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Joining of Al2O3 to ZTA using a B2O3–Al2O3–SiO2 glass with in-situ precipitated whiskers

Cao

Guo

et al. 2021

Ceramics International

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Glass structure and crystallization via two distinct thermal histories: Melt crystallization and glass crystallization

Cited by 7 publications

References 48 publications

Composite Powders Synthesized from the Water Solutions of Sodium Silicate and Different Calcium Salts (Nitrate, Chloride, and Acetate)

Composite Powders Synthesized from the Water Solutions of Sodium Silicate and Different Calcium Salts (Nitrate, Chloride, and Acetate)

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

Joining of Al2O3 to ZTA using a B2O3–Al2O3–SiO2 glass with in-situ precipitated whiskers

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