Microstructure transformation of a crystallized glass from the system BaO?SrO?ZnO?SiO ₂

Glass-ceramics from the studied system are able to precipitate a crystalline phase with an anomalous and low coefficient of thermal expansion. Besides called LEAZit (Low Expansion Alkaline Earth Zinc Silicate), other phases appear within those glass-ceramics. In order understand expansion behavior whole material, content has be known as function composition chosen heat treatment. this paper, glass molar 5 BaO · 12 SrO 35 ZnO 46.2 SiO2 1.5 Sb2O3 0.3 Ag is using X-ray tomography. With method, can in detail together microstructure. An ex-situ workflow was used study one same sample after different treatments, which makes it possible characterize structures (crystalline phase, residual matrix, porosity) inside nondestructive way. The size characterized strut thickness analysis three-dimensional datasets. tomographic results supported by diffraction well scanning electron microscopy combination elemental analysis.