“…The combination of the properties of mullite makes it a ceramic material of great technological importance, with wide applicability, both in traditional and advanced ceramics. Among the various products in which mullite is present, the following stand out: refractories [105][106][107][108][109][110], porcelain tiles [111,112], porcelains [113,114], porous high-resistance ceramics [115][116][117][118][119], membranes [18,120,121], crucibles [106], optical [122][123][124] and electronic components [28,[124][125][126][127], and matrix and reinforcement of composite materials [18,[128][129][130][131][132][133][134][135][136][137]. In recent years, many studies have been carried out to diversify the raw materials and methods used for the synthesis of mullite and, in this way, to further expand its applicability.…”