Abstract
Typically synthesis of oxide ceramics requires high
temperatures and long heat treatment times consuming a
lot of energy which increases the cost of products and
the environmental burden. In order to produce more
economical and more environmental friendly oxide ceramics
low-energy intensity processes are sought for. The
potential of mine tailings as a secondary raw material
source has been acknowledged widely. Compositions of mine
tailings vary, including typically SiO2, MgO, Al2O3 and
CaO as the main components. Presented study is a part of
the research aiming to utilize selected mine tailings
based minerals in production of porous ceramics by low
energy intensity processes. In this part of the study the
exothermic reaction assisted synthesis of oxide ceramics
are studied and compared to the basic sintering bonding.
The goal is to examine exothermically reactive raw
materials (e.g. aluminium powder) for less energy
intensity synthesis of mullite and spinel based ceramics.
Thermodynamic calculations and evaluations are presented
for selected mixtures. The thermal behaviour of raw
materials and thermal evolution of mixtures was studied
by using thermogravimetry (TGA) giving a simultaneous
Differential Scanning Calorimetry signal (DSC). Phase
structure evolution was analysed by an X-ray
diffractometry (XRD) and morphology of raw materials and
final products were analysed by scanning electron
microscope (SEM).
Original language | English |
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Publication status | Published - 2016 |
Event | 6th International Congress on Ceramics, ICC6 - Dresden, Germany Duration: 21 Aug 2016 → 25 Aug 2016 |
Conference
Conference | 6th International Congress on Ceramics, ICC6 |
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Abbreviated title | ICC6 |
Country/Territory | Germany |
City | Dresden |
Period | 21/08/16 → 25/08/16 |
Keywords
- low energy intensity processing
- exothermic
- mullite based ceramics