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 vitrification process and the
formation of mullite phases within the body. Fly ash is a by-product collected
by electrostatic precipitators in coal-fired power plants. Due to its rich
elemental composition and often alkaline nature, fly ash is commonly utilized
as an additive in the production of various ceramic materials. In this study,
the effects of fly ash from different thermal power plants—Çatalağzı-Zonguldak
(ÇAT), Çayırhan-Ankara (ÇAY), Kangal-Sivas (KAN), and Afşin-Elbistan A (AFŞ)—on
the properties of porcelain bodies were investigated. To this end, commercial
porcelain bodies were modified by incorporating 0%, 15%, and 30% fly ash by
weight into the compositions. The powder mixtures were homogenized by ball
milling at 75 rpm for 24 hours and then shaped via uniaxial dry pressing at 100
MPa. The pressed samples were subsequently fired at temperatures ranging from
1050 °C to 1150 °C for 1 hour. Comprehensive analyses were conducted on the
resulting porcelain bodies, including microstructural evaluation (SEM), phase
analysis (XRD), mechanical testing (three-point bending), and assessments of
various physical properties such as
color, linear shrinkage, water absorption, apparent porosity, and bulk density.
Among the tested samples, the composition containing 15 wt.% ÇAT fly ash and
fired at 1150 °C exhibited the best performance, with a compressive strength of
20.58 MPa and a water absorption rate below 0.5%. The results suggest that
selected fly ash types can enhance porcelain properties while supporting waste
valorization.