Abstract
Samples of feldspar were submitted to technological tests of calcination, allowing the assessment of the changes in the physical and chemical properties of these minerals, identifying technological problems, and understanding the changes that occur in crystal structure during the calcination. The feldspar samples from the Pegmatite Córrego Boa Vista, located in the Pegmatite District Conselheiro Pena (MG), were calcined in different temperatures (1100, 1150, 1200 and 1250 ºC) and subsequently characterized by electron probe microanalysis, scanning electron microscopy, infrared spectroscopy, Raman spectroscopy, and optical microscopy. Therefore, it was possible to evaluate the feldspars studied as raw material for possible applications in ceramic tile and glass industries.
Keywords:
feldspar; ceramics; expansion; calcination.