Hafif mineral katkılı killi-seramik malzemelerin mikroyapı ve fiziksel özellikleri

Abstract

Low density ceramic structures have an important place in application areas such as heat, noise and noise insulation. Besides, being durable and inexpensive is also a demand for producers and consumers. In this study, it is aimed to produce lightweight insulation ceramic materials from a binder clay containing diatomite and vermiculite raw materials in different proportions which is a local and natural mineral raw material source for low temperature applications. For this purpose, firstly, powdered raw materials is characterized for particle size distribution, chemical composition (x-ray fluorescence, XRF), thermal behavior (thermal gravimetric analysis, TGA), morphological structure (scanning electron microscope, SEM) and crystal phase structure (x-ray diffraction, XRD). Specific prescriptions were then prepared and pellet samples were obtained using the pressing method. The bulk density and porosity, dimensional changes, thermal conductivity coefficients and microstructural properties of the samples fired at temperatures between 900, 1000 and 1100 °C were compared. As a result of the study, the porosity of the ceramic samples containing 60% diatomite, 10% vermiculite and 30% binder clay increased up to 47%, while the bulk density values were obtained at 1.3 g/cm3 and the thermal conductivity coefficient was at 0.439 W / mK.