Sound Velocity of Kaolin in the Temperature Range from 20 °C to 1100 °C

Trník, Anton; Štubňa, Igor; Moravčíková, Jana

doi:10.1007/s10765-009-0634-y

Cited by 10 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The total shrinkage of the kaolin-zeolite products increases with the amount of zeolite from 2.59% for sample SLA to 3.91% for sample KZ50. Similar behavior of thermal expansion of kaolin samples was also obtained in [50,51]. The shrinkage of kaolin samples reached 2.5% and 3.2% at 1100 • C, respectively, which is in good agreement with our results.…”

Section: Thermodilatometric Analysissupporting

confidence: 91%

Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this study, the thermophysical properties such as the thermal expansion, thermal diffusivity and conductivity, and specific heat capacity of ceramic samples made from kaolin and natural zeolite are investigated up to 1100 °C. The samples were prepared from Sedlec kaolin (Czech Republic) and natural zeolite (Nižný Hrabovec, Slovakia). Kaolin was partially replaced with a natural zeolite in the amounts of 10, 20, 30, 40, and 50 mass%. The measurements were performed on cylindrical samples using thermogravimetric analysis, a horizontal pushrod dilatometer, and laser flash apparatus. The results show that zeolite in the samples decreases the values of all studied properties (except thermal expansion), which is positive for bulk density, porosity, thermal diffusivity, and conductivity. It has a negative effect for thermal expansion because shrinkage increases with the zeolite content. Therefore, the optimal amount of zeolite in the sample (according to the studied properties) is 30 mass%.

show abstract

Section: Thermodilatometric Analysissupporting

confidence: 91%

Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…1c), respectively, for Kunda and illitic clay, are characteristic to mullite crystallization [3,16].…”

Section: Resultsmentioning

confidence: 99%

“…Upon calcination to around 1050°C, the spinel phase nucleates and transforms to mullite (Si 2 Al 6 O 13 ) and highly crystalline cristobalite (SiO 2 ). The described processes were also studied from the electrical conductivity point of view [15] and through changing in the elastic properties [16] during linear heating of kaolin from room temperature up to 1050-1100°C.…”

Section: Introductionmentioning

confidence: 99%

Heating rate effect on the thermal behavior of some clays and their blends with oil shale ash additives

Kaljuvee

Štubňa

Húlan

et al. 2016

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

The heating rate effect on the thermal behavior of clays from Arumetsa and Kunda deposits (Estonia) and an illitic clay from Füzérradvány (Hungary) was studied. Experiments were carried out under dynamic heating condition up to 1050°C at the heating rates of 1.25, 2.5, 5 and 10°C min -1 in a stream of gas mixture containing 79 % of Ar and 21 % of O 2 with Setaram Labsys 1600 analyzer. Two different ashes were used as additives: the electrostatic precipitator ash from the first field and the cyclone ash formed, respectively, at circulating fluidized bed combustion (temperatures 750-830°C) and pulverized firing (temperatures 1200-1400°C) of Estonian oil shale at Estonian Power Plant. For calculation of kinetic parameters, the TG data were processed by the differential isoconversional Friedman method. The results of thermal analysis and the variation of the value of activation energy E along the reaction progress a indicated the complex character of decomposition of clays and their blends with Estonian oil shale ashes, and the certain differences in thermal behavior of different clays depending on their origin.

show abstract