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STA 449 F3 Jupiter® – Simultaneous TGA-DSC

 

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Characterization of Porcelain Raw Material
This STA measurement on porcelain raw material shows three mass-loss steps. Below approx. 250°C, the evaporation of humidity occurred. At temperatures between 250°C and 450°C, the burn-up of organic content was observed, during which 156 J/g of energy was released. The dehydration of kaolin occurred above 450°C and required 262 J/g. The mass spectrometer signals for mass numbers 18 and 44 reflect the corresponding release of H₂O and CO₂. The exothermic DSC peak at 1006°C with an enthalpy of -56 J/g is due to an solid-solid transition.

Building Material: Glass Wool
Glass Wool is often used for the insulation of houses and heating pipes. The STA measurement shows three mass-loss steps below approx. 600°C, which are due to the evaporation of humidity and the burn-up of organic binder. The latter can be seen from the strongly exothermic DSC signal in this temperature range. The step in the DSC signal at 728°C with an increase in the specific heat of 0.41 J/(g*K) is due to the glass transition. The exothermic DSC peak at 950°C with an enthalpy of -287 J/g is due to crystallization; the endothermic effects between approx. 1050°C and 1250°C with an entire enthalpy of 549 J/g show the melting. The slight mass changes above 700°C are most probably due to oxidation and evaporation of impurities.

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