Study of the crystallization temperature in obtaining glassceramics with a very low coefficient of thermal expansion from spodumene mineral of national origin and titanium oxide as nucleating agent

Abstract

Glass- ceramics based on Lithium aluminosilicate have acquired relevance due to their low coefficient of thermal expansion (CET), in addition to providing good mechanical resistance and good performance against chemical attack. These characteristics give them a diversity of applications, oven panels, electric cookers, optical applications, as well as internal components of valves and accessories in the chemical process industry that must ensure the tightness of the equipment even when subjected to significant thermal shocks. In this work, glass-ceramics were developed at different crystallization temperatures, using mineral Spodumene ((LiAlSi₂O₆) from an Argentine deposit given the interest that our country has to add value to its lithium mineral resources.
Obtaining glass-ceramics from mineral has the advantages of lower costs when compared to those incurred by the use of analytical quality reagents and the valuation of the national mining resource. We are also interested in determining the nucleating action of Titanium oxides.