Influence of a ‘shape/consolidation factor’ in unary, undoped oxide ceramics: Experimental evidence and associated benefits

Kumar, Lakshaman; Ali, Faiz; Bokka, Sravan; Chowdhury, Anirban

doi:10.1016/j.mtla.2022.101527

Cited by 1 publication

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“…The main aim of this work was to analyze this peculiar phase development pattern of BaCO 3 in connection to the same being given a shape (via compaction and heat-treatment) or kept free as loose powders. A similar difference on other materials has been recently investigated by our group , and others. , Prof. Schuh’s group conducted research on different ZrO 2 –CeO 2 systems in the form of pellet and oligocrystalline powders. The findings indicated that the sintered zirconia ceramic had a strongly suppressed phase transformation temperature.…”

Section: Introductionsupporting

confidence: 76%

Delving into the Discrepancy of Phase Developments between Powder and Shaped Pellets of BaCO₃

Kumar,

Sarkar,

Totade

et al. 2023

Crystal Growth & Design

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Although renewed scientific interest has emerged in BaCO 3 based on its stable orthorhombic (Pmcn) configuration, the present work examines a severe instability for the same when BaCO 3 is heat-treated in pelletized form in the vicinity of its phase transformation (from orthorhombic to trigonal phase) temperature. Although the calcined powders of BaCO 3 conform well to the standard JCPDS files, the BaCO 3 pellets depicted either a strong preferential c-axis orientation or strange variations in the intensity ratios of the peaks when characterized via X-ray diffraction and Raman spectroscopy. Our analysis involving a thermo-shape factor (ξ) attempts to connect between the ease/difficulty of energy release during trigonal to orthorhombic phase transformation. Our results also suggest that an easy compressible Ba−O atomic arrangement along the c-axis paved the path for the orientation perpendicular to the (002) plane. While the phase transformations in relation to pressure and/or temperature is well-known, our results suggest that the dependence of such phase changes with shaping/consolidation may also need relevant attention (wherever applicable) for future scientific understanding.

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Section: Introductionsupporting

confidence: 76%

Delving into the Discrepancy of Phase Developments between Powder and Shaped Pellets of BaCO₃

Kumar,

Sarkar,

Totade

et al. 2023

Crystal Growth & Design

Self Cite

View full text Add to dashboard Cite

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Influence of a ‘shape/consolidation factor’ in unary, undoped oxide ceramics: Experimental evidence and associated benefits

Cited by 1 publication

References 63 publications

Delving into the Discrepancy of Phase Developments between Powder and Shaped Pellets of BaCO₃

Delving into the Discrepancy of Phase Developments between Powder and Shaped Pellets of BaCO₃

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Influence of a ‘shape/consolidation factor’ in unary, undoped oxide ceramics: Experimental evidence and associated benefits

Cited by 1 publication

References 63 publications

Delving into the Discrepancy of Phase Developments between Powder and Shaped Pellets of BaCO3

Delving into the Discrepancy of Phase Developments between Powder and Shaped Pellets of BaCO3

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Delving into the Discrepancy of Phase Developments between Powder and Shaped Pellets of BaCO₃

Delving into the Discrepancy of Phase Developments between Powder and Shaped Pellets of BaCO₃