Thermal decomposition processes and their nucleation characteristics

Wiedemann, H. G.; Bayer, G.

doi:10.1007/bf00423549

Cited by 17 publications

(3 citation statements)

References 12 publications

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“…Both bassanite and anhydrite can be obtained from solution or by heating gypsum. This leads to a stepwise loss of structural water and results in the formation of bassanite in a first and of anhydrite in a second step. − In water, gypsum transforms upon heating to bassanite, due to the low crystallization rate of anhydrite . Anhydrite forms only under hydrothermal conditions .…”

Section: Introductionmentioning

confidence: 99%

Calcium Sulfate Nanoparticles with Unusual Dispersibility in Organic Solvents for Transparent Film Processing

et al. 2018

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Calcium sulfate is one of the most important construction materials. Today it is employed as high-performance compound in medical applications and cement mixtures. We report a synthesis for calcium sulfate nanoparticles with outstanding dispersibility properties in organic solvents without further functionalization. The nanoparticles (amorphous with small γ-anhydrite crystallites, 5-50 nm particle size) form long-term stable dispersions in acetone without any sign of precipitation. H NMR spectroscopic techniques and Fourier-transform infrared spectroscopy (FTIR) reveal absorbed 2-propanol on the particle surfaces that induce the unusual dispersibility. Adding water to the nanoparticle dispersion leads to immediate precipitation. A phase transformation to gypsum via bassanite was monitored by an in situ kinetic FT-IR spectroscopic study and transmission electron microscopy (TEM). The dispersibility in a volatile organic solvent and the crystallization upon contact with water open a broad field of applications for the CaSO nanoparticles, e.g., as nanogypsum for coatings or the fabrication of hybrid composites.

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Section: Introductionmentioning

confidence: 99%

Calcium Sulfate Nanoparticles with Unusual Dispersibility in Organic Solvents for Transparent Film Processing

et al. 2018

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“…4, drawn from ref. [13], cleavage plates of natural selenite of identical size and weight (10 mg) were submitted to a linear heating and subsequent cooling program at a rate of…”

Section: Some Experimental Conditions In Thermogravimetrymentioning

confidence: 99%

Fatcors influencing thermoanalytical curves

Oswald

Wiedemann

1977

Journal of Thermal Analysis

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“…30). In these experiments cleavage plates of natural gypsum (selenite) of identical size and weight (10 mg) were heated up with 2 ~ at 20 tort, 120 tort and 600 tort water vapor partial pressure [24][25][26][27]. At the lowest partial pressure the dehydration goes directly to ",/-anhydrite, during cooling rehydration to the hemihydrate takes place.…”

Section: Sample Propertiesmentioning

confidence: 99%

Trends and applications of thermogravimetry

Wiedemann

Bayer

Inorganic and Physical Chemistry

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Thermal decomposition processes and their nucleation characteristics

Cited by 17 publications

References 12 publications

Calcium Sulfate Nanoparticles with Unusual Dispersibility in Organic Solvents for Transparent Film Processing

Calcium Sulfate Nanoparticles with Unusual Dispersibility in Organic Solvents for Transparent Film Processing

Fatcors influencing thermoanalytical curves

Trends and applications of thermogravimetry

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