Characteristics of Thermal Parameters and Some Physical Properties of Mineral Eutectic Type: Petalite–Alkali Feldspars

Abstract

The aim of the research was to check whether the system of three fluxes based on lithium aluminium silicate and alkali feldspars has a eutectic point, i.e., with the lowest melting temperature. Lithium was introduced into the mixtures in the form of petalite, which occurs naturally in nature (Bikita Zimbabwe deposit). Using naturally occurring raw materials such as petalite, sodium feldspar, and potassium feldspar, an attempt was made to obtain eutectics with the lowest melting point to facilitate thermal processing of the mineral materials. In addition, the high-temperature viscosity of the mineral alloys and physical parameters such as density, linear shrinkage, and open porosity were studied. The study showed that in these systems, there is one three-component eutectic at 1345 °C, with the lowest viscosity of 1·105 Pas and the highest density of 2.34g/cm3, with a weight content of petalite 20%, sodium feldspar 20%, and potassium feldspar 20%.

The Effect of the Addition of Eggshell Residues in Mass Formulation for Ceramic Coating

“…The ceramics industry is looking for alternative materials to produce ceramic tiles, and adding eggshell waste can be a potential solution for sustainability, cost reduction and waste reduction [9][10][11]. In addition, the high concentration of calcium may contribute to the reduction in the sintering temperature of the ceramic coating, thus making the process less costly for the industry [10][11][12].…”