Synthesis, consolidation and dielectric properties of BLT ceramics processed by M-PVA gel ignition technique

Autor:	P. R. Kumar, Sandip Bysakh, S. K. Singh, V V Bhanu Prasad, S Roy
Rok vydání:	2013
Předmět:	Materials science Bismuth titanate Analytical chemistry Nanoparticle Sintering Mineralogy Dielectric Industrial and Manufacturing Engineering chemistry.chemical_compound chemistry visual_art Ceramics and Composites visual_art.visual_art_medium Relative density Orthorhombic crystal system Crystallite Ceramic
Zdroj:	Advances in Applied Ceramics. 112:263-269
ISSN:	1743-6761 1743-6753
DOI:	10.1179/1743676112y.0000000069
Popis:	Polycrystalline samples of lanthanum modified bismuth titanate ceramics with composition Bi3?25La0?75Ti3O12 (BLT) were prepared at three different sintering temperatures (1050, 1100 and 1150uC) using M-PVA gel ignition technique. The samples were characterised for structural and electrical properties. A significant amount of as burnt BLT powder was found to be crystalline in nature having a yellowish colour. Very fine BLT nanoparticles were characterised by TEM analysis. Single phase with orthorhombic crystal structure was observed for all the samples, confirmed by X-ray analysis. Dielectric properties were studied as a function of frequency and temperature. More than 95% relative density was observed for all the three sintered samples. The sample sintered at 1100uC showed highest dielectric constant and relative density and lowest loss.
Databáze:	OpenAIRE
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