Fluxing action of illite and microcline in a triaxial porcelain body

Wattanasiriwech, Suthee

doi:10.1016/j.jeurceramsoc.2011.01.025

Cited by 27 publications

(16 citation statements)

References 18 publications

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“…The quartz grain has rounded edges due to its dissolution in the glassy phase. Note also the cracking around the quartz particles, arising from differences in the thermal expansion coefficients of the matrix and particles of quartz [25]. The primary mullite is in the form of an aggregate of small crystals and is formed from the clay, and the secondary mullite is in the form of prismatic needles formed in the region of feldspar.…”

Section: Temperature (ºC) Apparent Porosity (%)mentioning

confidence: 99%

“…The composition is an important factor during sintering because, along with the temperature [20,21], it determines the final microstructure of the porcelain. Thus, a small change in the composition of both raw materials is enough to change the characteristics of the liquid phase and consequently the properties of porcelain [22][23][24][25][26]. The use of alumina as a substitute for quartz in the formulations of porcelain has been in development for some time, with promising results in respect to mechanical characteristics, but not such good in relation to the linear shrinkage [27] and the high cost of alumina.…”

Section: Introductionmentioning

confidence: 99%

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Effect of different sources of alumina on the microstructure and mechanical properties of the triaxial porcelain

2014

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Porcelains composed of kaolin-quartz-feldspar are called triaxial porcelains. The use of alumina as a substitute for quartz in porcelains has been developed for some time. The results show a significant improvement in their mechanical properties, but alumina has a high cost. The possibility of using alternative materials as a source of alumina with lower cost was investigated. In this work, alternative raw materials were used as a source of alumina: refractory bauxite, primary aluminum hydroxide, reprecipitated aluminum hydroxide. Compositions with commercial alumina and quartz were also formulated to better understand the effects of adding these alternative materials. The raw materials were milled, dried, and characterized by analysis of the particle size distribution, X-ray diffraction, and X-ray fluorescence. The compositions were formulated by replacing the different sources of alumina in the formulation of porcelain. The compositions studied were shaped by pressing and sintered at different temperatures (1150-1400 ºC). The results showed that the use of bauxite and aluminum hydroxide as an alternative source of Al2O3 is viable. The impurities contained in refractory bauxite contributed to the lower values of flexural strength found in compositions having refractory bauxite as a source of alumina. The compositions with reprecipitated aluminum hydroxide showed a high mechanical resistance at low sintering temperatures, while compositions with aluminum hydroxide obtained by the Bayer process achieved good results of mechanical strength in a wide temperature range.

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Section: Temperature (ºC) Apparent Porosity (%)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of different sources of alumina on the microstructure and mechanical properties of the triaxial porcelain

2014

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“…The d 001 reflection remained in the same position shown in Figure (b) when PI was used to prepare ID; this indicated that no molecules were intercalated into the interlayer of illite. This was mainly due to the nonexpendable nature of mica‐type clays . Illite is a mica clay with 2:1 layers, and the permanent negative charge of illite is usually balanced by potassium ions, which are located at the planar surfaces of both the clay particles and the interlayers .…”

Section: Resultsmentioning

confidence: 99%

Crystallinity, ion conductivity, and thermal and mechanical properties of poly(ethylene oxide)–illite nanocomposites with exfoliated illite as a filler

Zhen

Chi

Wang

et al. 2016

J of Applied Polymer Sci

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Illite particles were exfoliated by the intercalation and subsequent deintercalation of dimethyl sulfoxide (DMSO) in the interlayer of illite, and the exfoliated illite particles were used to prepare a novel poly(ethylene oxide) (PEO)–illite nanocomposite. The resulting exfoliated illite and PEO–illite nanocomposites were characterized by X‐ray diffraction (XRD), fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), differential scanning calorimetry, ion conductivity testing, thermogravimetry analysis, and mechanical testing. The XRD results showed that the acid treatment of illite to exchange K+ in the interlayer of illite with H+ was a necessary condition for the DMSO intercalation. SEM micrographs confirmed the exfoliation of the illite particles in the process of DMSO deintercalation from the interlayer of the illite–DMSO intercalation complex. A good dispersion of exfoliated illite in the PEO matrix was also confirmed. A gradual decrease in the PEO crystallinity in the PEO–illite nanocomposites was observed with increasing exfoliated illite concentration. The ion conductivity of the nanocomposites gradually increased with the filler content and reached 3.21 × 10−5 S/cm at an illite concentration of 20 wt %. The formation of an amorphous region around the exfoliated illite was beneficial for Li+‐ion conduction. The ion conductivity significantly increased when the amorphous regions were connected to each other to form a conducting path for Li+ ions with a high filler concentration of greater than 10 wt %. Meanwhile, the thermooxidative stability and mechanical properties of the PEO–illite nanocomposites were also enhanced when exfoliated illite was introduced into the polymer matrix. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44226.

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“…From the ceramic point of view, some part of illite in the kaolin-based ceramic mixture increases a content of the glassy phase as a consequence of the fluxing action of K2O [5,6] and decreases the firing temperature [25]. Increasing content of illite in such mixtures results in a decrease of mullite, cristobalite and quartz in the fired products [5].…”

Section: Introduction *mentioning

confidence: 99%

Thermomechanical Analysis of Illite From Füzérradvány

Húlan

Trník

Štubňa

et al. 2015

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Young's modulus of green illite from Füzérradvány (Hungary) was measured in-situ in the temperature interval 20 °C -1100 °C and auxiliary analyses DTA, TG and TDA, XRD and EGA, were also performed. It was found that a removal of the physically bound water (20 °C -250 °C) sets illite crystals closer, which leads to a significant increase of Young's modulus from its initial value of 7 GPa to the maximum 12 GPa at 300 °C. Young's modulus slightly decreases in the temperature interval of dehydroxylation of illite (300 °C -800 °C), and which then reaches up to 45 GPa at 1100 °C, increasing exponentially as a consequence of the sintering above 800 °C.

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Fluxing action of illite and microcline in a triaxial porcelain body

Cited by 27 publications

References 18 publications

Effect of different sources of alumina on the microstructure and mechanical properties of the triaxial porcelain

Effect of different sources of alumina on the microstructure and mechanical properties of the triaxial porcelain

Crystallinity, ion conductivity, and thermal and mechanical properties of poly(ethylene oxide)–illite nanocomposites with exfoliated illite as a filler

Thermomechanical Analysis of Illite From Füzérradvány

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