Effect of increasing lanthanum substitution and the sintering procedures on the properties of SrBi < inf > 4 < /inf > Ti < inf > 4 < /inf > O < inf > 15 < /inf > ceramics
Effect of increasing lanthanum substitution and the sintering procedures on the properties of SrBi < inf > 4 < /inf > Ti < inf > 4 < /inf > O < inf > 15 < /inf > ceramics
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Date
2015-09-01
Authors
Rambabu, A.
James Raju, K. C.
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Abstract
Lanthanum-substituted SrBi4Ti4O15 (SBTi) ceramic, that is SrBi4-xLaxTi4O15 (SBLTi), samples were calcined by solid-state reaction and densified using the microwave sintering and conventional sintering techniques. Their structural, morphological and mechanical properties were investigated. The microwave sintered samples showed high densities like 95% of the theoretical density with short duration exposures. Compared with SBTi ceramics and other lanthanide-substituted compositions, the incorporation of La3+ results in clear improvement in properties for SBLT (x ~ 0.75) with respect to the values of hardness and Young's modulus of the microwave sintered samples (8.8-12.5 and 160-180 GPa) are higher than that for conventional sintered (8-10 and 135-155 GPa) samples.
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Keywords
La-substituted SBTi ceramics,
Mechanical properties,
Microwave sintering
Citation
Bulletin of Materials Science. v.38(5)