Akademik Veri Yönetim Sistemi
Journal of Ceramic Processing Research, cilt.26, sa.5, ss.703-716, 2025 (SCI-Expanded, Scopus)
Porcelain is a non-porous, vitrified ceramic material characterized by a white, fine-grained, and often semi-transparent body. Its superior toughness, strength, and translucency compared to other ceramic types are primarily attributed to the vitrificationprocess and the formation of mullite phases within the body. Fly ash is a by-product collected by electrostatic precipitatorsin coal-fired power plants. Due to its rich elemental composition and often alkaline nature, fly ash is commonly utilized asan additive in the production of various ceramic materials. In this study, the effects of fly ash from different thermal powerplants—Çatalağzı-Zonguldak (ÇAT), Çayırhan-Ankara (ÇAY), Kangal-Sivas (KAN), and Afşin-Elbistan A (AFŞ)—on theproperties of porcelain bodies were investigated. To this end, commercial porcelain bodies were modified by incorporating0%, 15%, and 30% fly ash by weight into the compositions. The powder mixtures were homogenized by ball milling at 75rpm for 24 hours and then shaped via uniaxial dry pressing at 100 MPa. The pressed samples were subsequently fired attemperatures ranging from 1050 °C to 1150 °C for 1 hour. Comprehensive analyses were conducted on the resulting porcelainbodies, including microstructural evaluation (SEM), phase analysis (XRD), mechanical testing (three-point bending), andassessments of various physical properties such as color, linear shrinkage, water absorption, apparent porosity, and bulkdensity. Among the tested samples, the composition containing 15 wt.% ÇAT fly ash and fired at 1150 °C exhibited the bestperformance, with a compressive strength of 20.58 MPa and a water absorption rate below 0.5%. The results suggest thatselected fly ash types can enhance porcelain properties while supporting waste valorization.