Impact of ZnO on the structure of aluminosilicate glazes

Leśniak, Magdalena; Partyka, Janusz; Sitarz, Maciej

doi:10.1016/j.molstruc.2016.01.009

Cited by 24 publications

(18 citation statements)

References 29 publications

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“…After decomposition, the band layout in all spectra is similar. And so, the band at 1116/1080/1177 cm -1 is associated with asymmetric stretching vibrations Si=O (defects), band at 988/982/ 1067 cm -1 with asymmetric stretching vibrations Si-O (Si, Al)-silico-oxygen and alumino-silico-oxygen bridges (bridge bonds) [39][40][41][42][43], bands at 905/904/960 and 855/845/ 884 cm -1 with asymmetric stretching vibrations Si-Oand Al-O -, respectively-broken silico-and aluminooxygen bridges (terminal bonds) [40][41][42][43][44][45], bands at approximately 730 and 690 cm -1 with symmetric Tables 2 and 3), it can be clearly stated that the main difference that should be noted is the much higher integral intensity (surface area under curve) of bands associated with terminal bonds (bands at 904 cm -1 and 845 cm -1 , Fig. 4, Table 3) and lower intrinsic intensity of the band bound to silicon and aluminium bridges (band at 982 cm -1 , Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The X ratio is much lower for glass with the addition of 2.51 mass% SrO (X 2.51 = 1.27, Table 3) compared to an analogous ratio for glass without the addition of SrO (X 0.0 = 0.58, Table 2). This means that the addition of strontium oxide to the initial glass composition (Gl-0) in an amount of 2.51 mass% causes depolymerization (weakening) of the aluminium-silicon network [26,40,44].…”

Section: Resultsmentioning

confidence: 99%

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Influence of SrO content on microstructure and crystallization of glazes in the SiO2–Al2O3–CaO–MgO–K2O system

Gajek

Rapacz-Kmita

Leśniak

et al. 2019

J Therm Anal Calorim

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The effect of the SrO addition on the microstructure and structure of the glazes from the SiO 2-Al 2 O 3-CaO-MgO-K 2 O system was investigated in this study. The results were obtained by testing the ability of the frits crystallization, the stability of the crystallizing phases during the single-step fast-firing cycle depending on their chemical composition and the effect of addition of strontium oxide. Differential scanning calorimetry (DSC) curves showed that all glazes crystallized, and diopside and anorthite were mainly identified as dominant phases in the obtained glazes, while the size and amount of each depended on the amount of SrO introduced. The thermal characteristic of the frits was carried out using DSC, and crystalline phases were determined by X-ray diffractometry. The glaze microstructure was investigated by scanning electron microscopy and transmission electron microscopy. Additional information on the microstructure of frits was derived from spectroscopic studies in the mid-infrared range.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Influence of SrO content on microstructure and crystallization of glazes in the SiO2–Al2O3–CaO–MgO–K2O system

Gajek

Rapacz-Kmita

Leśniak

et al. 2019

J Therm Anal Calorim

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“…We report the performances of the proposed strategies based on US compared to random sampling (RS) for three known phase diagrams: [26][27][28], and the ternary phase diagram of glass-ceramic glazes of SiO 2 , Al 2 O 3 , and MgO (SiO 2 -Al 2 O 3 -MgO) [29]. Here, the next point in RS is randomly selected from the unchecked points and the phase diagram is estimated using the phase estimation methods described above.…”

Section: Phase Diagram Construction By Uncertainty Samplingmentioning

confidence: 99%

Efficient construction method for phase diagrams using uncertainty sampling

Terayama

Tamura

Nosé

et al. 2019

Phys. Rev. Materials

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We develop a method to efficiently construct phase diagrams using machine learning. Uncertainty sampling (US) in active learning is utilized to intensively sample around phase boundaries. Here, we demonstrate constructions of three known experimental phase diagrams by the US approach. Compared with random sampling, the US approach decreases the number of sampling points to about 20%. In particular, the reduction rate is pronounced in more complicated phase diagrams. Furthermore, we show that using the US approach, undetected new phase can be rapidly found, and smaller number of initial sampling points are sufficient. Thus, we conclude that the US approach is useful to construct complicated phase diagrams from scratch and will be an essential tool in materials science.

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“…To date, many LAS parent glass composition has been modi ed to produce LAS glass-ceramic, for instance, the addition of oxides in LAS glass-ceramic such as B 2 O 3 [31], BaO [22], ZnO [32] and MgO [33].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Isothermal Treatment on the Structural, Microstructure and Physical Properties of Li2O-Al2O3-SiO2 Glass-Ceramic

Lutpi

Mohamad

Abdullah

2020

Preprint

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The present work aims to investigate the effects of isothermal treatment on the structural, microstructure and physical properties of Li2O-Al2O3-SiO2 glass-ceramic. Sintering temperature plays a major role in producing the desired lithium aluminosilicate (LAS) glass-ceramic crystalline phases. This work also aims to achieve a low thermal expansion coefficient β-spodumene (LiAlSi2O6) crystalline phase with improved density and lower porosity, which can be useful for the applications with thermal shock properties. The LAS glass-ceramic was fabricated by the melt-quenching technique at 1550 °C for 5 h before being isothermally sintered at an elevated temperature of 900 to 1200 °C for 30 min. The evolution of LAS glass-ceramic crystalline phases was identified using differential thermal analysis and the β-spodumene exothermic peak appeared at 999 °C. Based on the X-ray diffraction results, the complete transformation of β-spodumene from high-quartz solid solution (β-quartz) occurred at 1000 °C. However, the sintering temperature did not change the crystalline phase when sintered above 1000 °C, but the lattice parameter of the crystal structure was slightly altered. Moreover, it was observed that the LAS glass-ceramic grain size increased with temperature, whereby the smallest average grain size recorded (0.61 µm) for LAS glass-ceramic sintered at 1100 °C. Meanwhile, the fully densified LAS glass-ceramic at 1100 ° C was measured at 2.47 g/cm3 with 0.52% porosity. The isothermal treatment at elevated temperature indicated that sintering at 1100 °C provided a denser, less porous, and small average grain size which is preferred for thermal shock resistance applications.

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Impact of ZnO on the structure of aluminosilicate glazes

Cited by 24 publications

References 29 publications

Influence of SrO content on microstructure and crystallization of glazes in the SiO2–Al2O3–CaO–MgO–K2O system

Influence of SrO content on microstructure and crystallization of glazes in the SiO2–Al2O3–CaO–MgO–K2O system

Efficient construction method for phase diagrams using uncertainty sampling

Investigation of Isothermal Treatment on the Structural, Microstructure and Physical Properties of Li2O-Al2O3-SiO2 Glass-Ceramic

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