| Effect of Microwave and Conventional Processing on the Sintering of Aluminium-Doped Lanthanum Germanium-Based Electrolyte Material (La9.5Ge5.5Al0.5O26) Calcined by Microwave and Electric Heating |
Chetan Sharma,a, * Kanchan Lata Singh,b Anirudh Pratap Singh,c Man Vir Singh,d Payal Sharma,b Vandana Naithani,c
Sonia Magoc and Ravinder Kumar Chadhac
Pages : 15-23
DOI: 10.1080/0371750X.2026.2618147 |
| Abstract |
| The current study reports the sintering of an aluminium-doped lanthanum
germanium-based electrolyte material with the composition La9.5Ge5.5Al0.5O26,
performed under both microwave energy and conventional heating. The
precursor of the composition La9.5Ge5.5Al0.5O26 was prepared using the mixed
oxide method, and the precursor was calcined at 900o
, 1000o
and 1100oC for 1 h to
optimize the minimum calcination temperature for achieving a single phase of
La9.5Ge5.5Al0.5O26. The precursor was calcined at 1100oC for 1 h by conventional
heating. The calcined powder obtained by microwave and electric heating was
sintered at 1350oC for 30 min duration by microwave heating and for 4 h duration
at the same temperature by conventional heating. X-ray diffraction (XRD) revealed
that the conventionally sintered sample was of a single phase. But when it was
further investigated by microwave Raman spectroscopy, it showed the presence
of a monoclinic phase (La2GeO5
) along with a hexagonal phase. But samples
sintered by microwave energy had resulted in the formation of a single hexagonal
phase, which was revealed by both XRD and micro Raman spectroscopy.
Microwave sintered AlMCMS and AlCCMS samples showed higher conductivity
values of 2.2110–3 and 1.5910–3 S.cm–1 at 650oC, respectively, whereas
conventionally sintered AlMCCS and AlCCCS samples exhibited lower conductivity
values of 4.18×10–4 and 5.62×10–4 S.cm–1, respectively, at 650oC. |
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