Kinetic analysis of the formation of high-temperature phases in an illite-based ceramic body using thermodilatometry

Ondro, Tomáš; Húlan, Tomáš; Al-Shantir, Omar; Csáki, Štefan; Václavů, Tereza; Trník, Anton

doi:10.1007/s10973-019-08781-w

Cited by 11 publications

(5 citation statements)

References 24 publications

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“…The phase composition of the studied samples below 900 °C showed a gradual increase in the amorphous content with glass content in the mixtures. Above 900 °C, the mineral illite underwent a structural collapse, and a glassy phase formed in accordance with the results reported for a clay with high illite content in [8,[35][36][37]. Owing to this transition, the amorphous content increased further.…”

Section: Effect Of the Glass Concentration On The Sintering Processessupporting

confidence: 89%

“…After heating at 1000 °C (without glass addition), quartz (PDF#01-077-1060), muscovite (PDF#00-007-0025), illite (PDF#01-076-5970), diopside (PDF#01-071-3828), haematite (PDF#00-033-0664), and microcline (PDF#01-076-6582) were identified as mineral phases present in the sample (Figures 6 and The phase composition of the studied samples below 900 • C showed a gradual increase in the amorphous content with glass content in the mixtures. Above 900 • C, the mineral illite underwent a structural collapse, and a glassy phase formed in accordance with the results reported for a clay with high illite content in [8,[35][36][37]. Owing to this transition, the amorphous content increased further.…”

Section: Effect Of the Glass Concentration On The Sintering Processessupporting

confidence: 89%

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Influence of Glass Additions on Illitic Clay Ceramics

et al. 2020

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A mixture of an illitic clay and waste glass was prepared and studied during the sintering process. The illitic clay, from the Liepa deposit (Latvia), and green glass waste (GW) were disintegrated to obtain a homogeneous mixture. The addition of disintegrated GW (5–15 wt% in the mixture) led to a reduction in the intensive sintering temperature, from 900 to 860 °C, due to a significant decrease in the glass viscosity. The addition of GW slightly decreased the intensities of the endo- and exothermic reactions in the temperature range from 20 to 1000 °C due to the reduced concentration of clay minerals. GW reduced the plasticity of the clay and reduced the risk of structural breakage. The increase in sintering temperature from 700 to 1000 °C decreased the apparent porosity and water uptake capacity of the ceramics from 35% and 22%, down to 24% and 13%, respectively. The apparent porosities of all the sintered mixtures showed a decrease of between 6% to 9% after the addition of GW with concentrations from 5 up to 15 wt% respectively, while the water uptake capacities decreased from between 4% and 10%. The addition of GW led to an increase in the apparent density of the ceramic materials, up to 2.2 g/cm3. Furthermore, the compressive strength increased by more than two times, reaching a highest value of 240 MPa after the sintering of the 15 wt% GW-containing mixture at 1000 °C.

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Section: Effect Of the Glass Concentration On The Sintering Processessupporting

confidence: 89%

Section: Effect Of the Glass Concentration On The Sintering Processessupporting

confidence: 89%

Influence of Glass Additions on Illitic Clay Ceramics

et al. 2020

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“…The presence of an exothermic effect with a peak maximum at about 320 • C, accompanied by the mass loss of 0.6%-2%, is attributed to the organic matter combustion. The broad endothermic peak within the temperature range of 400 to 780 • C, which coincides with a significant mass loss (about 3%) on the TG curves, suggests a superposition of more than one endothermic effect related to the dehydroxylation of hydromicas and kaolinite accompanied by phase transitions into dehydroxylated phases [55][56][57][58][59]. The destruction of the illite lattice appears within the temperature range of 870-890, expressing as a weak endothermic effect.…”

Section: Thermal Analysismentioning

confidence: 87%

“…The destruction of the illite lattice appears within the temperature range of 870-890, expressing as a weak endothermic effect. In addition, the small exothermic peak at ~920 • C is regarded as corresponding to the formation of a spinel phase [57,[60][61][62].…”

Section: Thermal Analysismentioning

confidence: 99%

Ceramic Materials Based on Clay and Soapstone Waste: Thermo-Mechanical Properties and Application

Ilyina,

Klimovskaya,

Bubnova

2023

Minerals

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In order to assess the feasibility of utilizing soapstone waste, which is generated during the production of stone blocks for fireplaces and other energy-saving devices, the effect of its addition to clay on the technological and thermal properties of ceramic materials was investigated. Two local clays and soapstone processing waste were characterized using XRD, SEM-EDS, XRF, DTA-TG, and granulometric analysis. The linear firing shrinkage, water absorption, density, flexural strength, thermal conductivity, specific heat capacity, and thermal shock resistance of the fired ceramic samples were analyzed. The results have shown that addition of soapstone waste to clay in an amount of 40 wt.% increases flexural strength, enhances thermal stability, and, additionally, reduces the thermal conductivity of the experimental samples. The technological properties of the final product meet the standard requirements for ceramic tiles.

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“…The rst period of intensive shrinkage in composites is nished between 1050 (CR11) and 1076 °C (CR12) when the peaks are reached due to the completion of the primary mullite formation [28,35]. The additional shrinkage up to the sintering temperature was in the range of 0.73 (CR11) and 2.65% (CR7).…”

Section: Dilatometrymentioning

confidence: 99%

Raw kaolinitic–illitic clays as high-mechanical-performance hydraulically pressed refractories

Vasić

Radovanović

Pezo

et al. 2022

J Therm Anal Calorim

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The usage possibility of 19 composites of raw refractory clays from Serbia containing approximately 53.29% of SiO 2 and 26.73% of Al 2 O 3 is presented. The sum of uxing oxides was 57.74%, while these materials contained 32% of quartz, 29% of kaolinite and 26% of illite-mica. Dilatometry tests revealed a sudden shrinkage with the peak at approximately 1115 °C, owing to the formation of mullite. The refractoriness was in the range of 1581-1718 °C, which classies the composites from low-to high-duty refractories. Based on correlation analysis, the refractoriness mostly depended on the content of alumina. The lightness of the red test pieces was lower after ring when compared to the dry samples, and it decreased with the ring temperature from reddish to grayish. The study presents a novel attempt to dene all the necessary properties of raw refractory clays and products red at the 1100-1300 °C range on a laboratory level. Most of these clays can be used as natural refractory materials for ceramic and glass furnace lining. The organic matter in some of the samples inuences negatively the fast-ring process.

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Kinetic analysis of the formation of high-temperature phases in an illite-based ceramic body using thermodilatometry

Cited by 11 publications

References 24 publications

Influence of Glass Additions on Illitic Clay Ceramics

Influence of Glass Additions on Illitic Clay Ceramics

Ceramic Materials Based on Clay and Soapstone Waste: Thermo-Mechanical Properties and Application

Raw kaolinitic–illitic clays as high-mechanical-performance hydraulically pressed refractories

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