Viscosity and Thermal Evolution of Density and Wetting Angle of a Commercial Glaze by Means of Hot Stage Microscopy

Stábile, Franco Matías; Piccico, M.; Serra, María Florencia; Rafti, Matías; Suárez, Gustavo; Rendtorff, Nicolás M.

doi:10.1016/j.mspro.2015.05.031

Cited by 20 publications

(12 citation statements)

References 2 publications

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“…Hot stage microscopy of the glasses IV and VII was performed on α‐Al 2 O 3 and β‐Al 2 O 3 substrates to determine the sealing temperature. The glass characteristic temperatures determined from the photographs are shown in the Figure . The initial and final shrinkage temperature and softening temperature for the glasses remain same regardless of the substrate.…”

Section: Resultssupporting

confidence: 88%

Silica‐free sealing glass for sodium‐beta alumina battery

Manthina

Song

Singh

et al. 2018

Int J Applied Ceramic Tech

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A CaO‐Bi2O3‐Al2O3‐B2O3 glass system was studied as a sealant for sodium‐sulfur battery. The thermal properties such as thermal expansion coefficient, glass transition, and softening temperature were determined by dilatometry and differential scanning calorimetry. Selected glasses, based on the thermal properties, were bonded with α‐alumina substrate followed by aging in air at 400°C for 100 hours and in sodium vapor at 350°C for 100 hours. The interfacial compatibility and resistance to sodium vapor corrosion of the bonded and aged samples were evaluated by structural and microstructural analysis using X‐ray diffractometer (XRD) and scanning electron microscope (SEM) attached with energy dispersive spectroscope (EDS). Helium leakage test was performed at room temperature to examine the sealing ability of the select glass. It is found that Bi2O3 increases the thermal expansion coefficient, decreases the glass transition and softening temperature, shows excellent interfacial compatibility and thermal cycling resistance, improves sealing ability, and degrades sodium corrosion resistance.

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Section: Resultssupporting

confidence: 88%

Silica‐free sealing glass for sodium‐beta alumina battery

Manthina

Song

Singh

et al. 2018

Int J Applied Ceramic Tech

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“…The characteristic shapes are defined here: initial deformation temperature (IT), spherical temperature (ST), hemispherical temperature (HT) and flow temperature (FT). These temperatures are calculated based on definitions stated by Stabile et al [22]. HSM is carried out on two series: one of original grain sizes and one of crushed samples.…”

Section: Hsmmentioning

confidence: 99%

“…For each sample two measurements are shown here, one (upper) with original grain size distribution, and one (lower) with crushed samples. The method presented by Stabile et al[22] is used to calculate the temperatures corresponding to characteristic shapes: Initial deformation Temperature (IT), Spherical Temperature, Hemispherical Temperature (HT) and Flow Temperature (FT). For the samples marked with (*) images are obtained every 25 K, for the rest images are obtained every 5 K.…”

mentioning

confidence: 99%

Melting behaviour of raw materials and recycled stone wool waste

Schultz-Falk

Agersted

Jensen

et al. 2018

Journal of Non-Crystalline Solids

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Stone wool is a widely used material for building insulation, to provide thermal comfort along with fire stability and acoustic comfort for all types of buildings. Stone wool waste generated either during production or during renovation or demolition of buildings can be recycled back into the stone wool melt production. This study investigates and compares the thermal response and melting behaviour of a conventional stone wool charge and stone wool waste. The study combines differential scanning calorimetry (DSC), hot stage microscopy (HSM) and X-ray diffraction (XRD). DSC reveals that the conventional charge and stone wool waste have fundamentally different thermal responses, where the charge experiences gas release, phase transition and melting of the individual raw materials. The stone wool waste experiences glass transition, crystallization and finally melting. Both DSC and HSM measurements indicates that the wool waste initiates melting at a lower temperature than the conventional charge. Also DSC measurements show that the wool waste requires less energy for heating and melting than the conventional charge, making stone wool waste recycling desirable both for environmental and for process purposes.

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“…Using such a device it is possible to observe and record (photographic or digital recording) the changes of sample contours with temperature, which makes possible to determine fusibility (from the sample shape and geometry), and also viscosity, wettability and surface tension of various raw materials and products at the temperatures approximating the range of their melting [1,2]. Modern hot-stage microscopes provide a continuous recording of such measurements and a computer-aided handling of laboratory data.…”

Section: Introductionmentioning

confidence: 99%

“…The curve presents the dependence between the growing temperature and the ratio (expressed in %) of heights of two samples: the initial one (prior to heating) and the sample at a given temperature of its expansion or shrinking; in ceramics it is most often used to characterize high-temperature processes of glasses or enamels, also of keramsite (LECA-lightweight expanded clay aggregates) [2,4,7]. Referring to the latter material, particularly useful is a method proposed in [8] and based on investigating the changes of the sample cross-section area that proceed in the course of heating and are observed under a hot-stage microscope.…”

Section: Introductionmentioning

confidence: 99%

Application of hot-stage microscopy to evaluating sample morphology changes on heating

Panna

Wyszomirski

Kohut

2016

J Therm Anal Calorim

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Investigations of the thermal properties of a raw material or a ceramic product under a hot-stage microscope allow, among others, determining the characteristic temperatures corresponding to the changes of the shape and the cross-section area of samples being heated. They are based on observing and analysing images of the sample recorded with the growth of its temperature. The pictures of changes allow establishing-for the raw materials with the ability of thermal expansion-the technological temperatures of sintering, softening, thermal expansion, melting and flowing. Their knowledge is necessary in determining optimum ranges of manufacture conditions for a number of ceramic processes. Considering some difficulties with precise determination of these characteristic temperatures and with the problem of measuring the coefficient of thermal expansion S of clay raw materials, the authors have proposed hereby a new method of measuring a sample cross-section area on heating under a hot-stage microscope. It has been invented and implemented in the Matlab software environment on the basis of an image analysis of the expanding sample. The changes of its cross-section area (i.e. an outline area visible under a hot-stage microscope) are continuously recorded on the film and can be converted after digital processing into sample volume changes. The method is applicable to precise measuring the coefficient of thermal expansion S of clay raw materials, among others those used in the manufacture of lightweight ceramic aggregates.

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Viscosity and Thermal Evolution of Density and Wetting Angle of a Commercial Glaze by Means of Hot Stage Microscopy

Cited by 20 publications

References 2 publications

Silica‐free sealing glass for sodium‐beta alumina battery

Silica‐free sealing glass for sodium‐beta alumina battery

Melting behaviour of raw materials and recycled stone wool waste

Application of hot-stage microscopy to evaluating sample morphology changes on heating

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