Conventional and non-conventional sintering techniques of high purity alumina ceramics (CROSBI ID 288955)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Ropuš, Ivana ; Ćurković, Lidija ; Mandić, Vilko ; Kerolli Mustafa, Mihone ; Gabelica, Ivana
engleski
Conventional and non-conventional sintering techniques of high purity alumina ceramics
The goal of this study is to compare the properties of cold isostatically pressed (CIP) alumina (A2O3) samples sintered by conventional (electrical) and non-conventional (hybrid microwave) techniques. X-ray diffraction was used to determine phase composition of A2O3 samples (raw powder and granules). Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) analyses were used to investigate the thermal behaviour of the Al2O3 powder and granules during the thermal treatment. Compaction of spray dried A2O3 granules into green compact bodies was performed by CIP, followed by sintering of green bodies at 1600 °C in an electrical and hybrid microwave kilns, respectively. Scanning electron microscopy (SEM) was used to analyse morphology of the Al2O3 granules and fracture surface of Al2O3 compacts derived by both sintering techniques. Higher linear shrinkage and densification were obtained for alumina samples sintered in electrical kiln (conventional method), while sintering by faster and more energy efficient hybrid microwave kiln (non-conventional sintering method) yielded alumina samples with finer grain size. Alumina samples sintered by electrical kiln displayed higher relative densities and lower porosities.
alumina ceramics ; conventional sintering ; hybrid microwave sintering ; shrinkage
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Podaci o izdanju
28 (5)
2021.
1526-1531
objavljeno
1330-3651
1848-6339
10.17559/TV-20200825223809
Trošak objave rada u otvorenom pristupu
Povezanost rada
Kemijsko inženjerstvo, Strojarstvo, Temeljne tehničke znanosti