Abstract
The crushing strengths of four different experimental
magnesium aluminate spinel (MgAl2O4) granule beds were
monitored with the axial die pressing test after heat
treatments. Precursor, magnesium hydroxide (Mg(OH)2) and
magnesium oxide (MgO) as Mg precursor and aluminium oxide
hydroxide Al(O)OH and a-Al2O3 as Al precursor, were used
for experimental granules, which were manufactured via a
dispersion manufacturing and spray-drying process. After
spray-drying, granules were heat treated in air at 1000,
1100, 1200, 1300 and 1400°C. In order to understand the
potential effect of precursor, phase structure,
morphology, particle size distribution and density of
granules on crushing strength behaviour, scanning X-ray
diffraction (XRD) was used together with electron
microscopy (SEM) and laser diffraction (LDPA) for
characterisation. All precursor mixtures formed spherical
granules during the spray-drying process and pure spinel
phase structure during heat treatment. The crushing
strength test results indicated that the Al precursor
clearly affected the crushing strength behaviour of
experimental granule beds. The highest strength was
observed for granule beds with Al(O)OH) as Al and Mg(OH)2
as Mg precursor.
Original language | English |
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Pages (from-to) | 8494-8500 |
Journal | Ceramics International |
Volume | 41 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2015 |
MoE publication type | A1 Journal article-refereed |
Keywords
- axial pressing
- granule
- MgAl2O4 spinel
- the crushing strength
- ProperPart
- ProperTune