Utilización de técnicas acopladas de análisis térmico TG-DSC-QMSFTIR en la caracterización de arcillas y composiciones cerámicas utilizadas en la fabricación de baldosas cerámicas. Cuantificación de compuestos de carbono

Abstract

In this study, a work methodology has been developed for t evolved gas analysis (EGA) in clay raw materials and ceramic compositions used in ceramic tile manufacture using coupled thermal analysis techniques (TG-DSC-QMS-FTIR). The different types of gases (CO2, CO, NOx, F, SOx) evolving from these raw materials during a thermal cycle up to a peak temperature of 1200°C were characterised. The posibility of using this calorimeter for the quantification of the CO2 gases evolving from the organic and inorganic carbon (carbonates) present in the studied clay materials was also evaluated. The measurements were validated with different reference materials, and the results were compared with those obtained with other analysis techniques, such as thermogravimetry (TG), calcimetry, and coulometry. The thermal analysis technique (TG-DSC-QMS-FTIR) is a suitable technique for analysing evolved gases with low uncertainties for carbon compounds quantification. Furthermore, the methodology allows the mineralogical origin identification of the elements present in the evolved gases.