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.com
Volume 5, Issue 6 (Suppl)
J Mat. Sci.
ISSN: 2321-6212
Advanced Materials 2017
October 26-28, 2017
OCTOBER 26-28, 2017 OSAKA, JAPAN
13
TH
INTERNATIONAL CONFERENCE ON
Advanced Materials and Nanotechnology
Sintering of ceramic materials using Refused Derived Fuel (RDF): A non-isothermal kinetic model
Rababe Sani, Doan Pham Minh, Thierry Cutard and Ange Nzihou
Universite de Toulouse, France
N
umber of studies has suggested the description of sintering steps during firing ceramic materials. However, these studies
have shown considerable variations in the description of each step of sintering and still rare are those interested by
ceramic materials produced from clay/additive mixtures. In this work, new ceramic materials have been developed using raw
clay and additives matter such as Refused Derived Fuel (RDF). A multi-step kinetic model for the sintering of clay with and
without RDF incorporation was developed. The sintering process of these ceramic materials was investigated by the non-
isothermal Thermo Mechanical Analysis (TMA) under constant load (10 g) and oxidant atmosphere. The compacted samples
were heated up to 1100 °C with Constant-Heating-Rate (CHR) of 2, 5 and 10 °C/min, respectively. The sintering mechanisms
and kinetic parameters were determined for each step. As novelty, Fraser-Suzuki Deconvolution (FSD) and Kissinger-Akahira-
Sunose (KAS) methods were used together to determine activation energy (Eα) for each pseudo-component during firing of
clay and clay/RDF mixture, respectively. The kinetic function f(α) was determined by the master-plot method and eventually
the pre-exponential factor (A). Sintering of clay material was described by two steps, whereas for the clay/RDF mixture, a
new viscous phase related to the physicochemical transformation of RDF appeared. Thus, its sintering took place with three
individual steps that developed in parallel. It was demonstrated that the last step of sintering related to the crystallization of
spinel phase (Si
3
Al
4
O
12
) was appropriately described by the Johnson-Mehl-Avrami (KJMA) equation. The ceramic material
compositions and contribution of each step of sintering were discussed.
Biography
Rababe Sani is currently pursuing PhD from School of Albi Rapsodee Mines. She works on the physicochemical transformations of ceramic materials during firing
process.
rababe.sani@mines-albi.frRababe Sani et al., J Mat. Sci. 2017, 5:6
DOI: 10.4172/2321-6212-C1-008