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Densification behaviour and two stage master sintering curve in lithium sodium niobate ceramics

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Title Densification behaviour and two stage master sintering curve in lithium sodium niobate ceramics
 
Creator MITRA, S
KULKARNI, AR
PRAKASH, O
 
Subject Sintering
Diffusion
Niobates
Master sintering curve
 
Description The Master Sintering Curve (MSC) has received much attention in recent years due to its ability to predict sintering behaviour of a given powder and green body process regardless of its thermal history. In this paper MSC, based on the combined stage sintering model is constructed for one of the most important lead-free piezoelectric viz, lithium sodium niobate, Na1-xLixNbO3 (x=0.12, LNN-12), ceramic using shrinkage data. The present study has been carried out to understand and control the densification behaviour during pressureless sintering. Two distinct stages of densification have been observed en route to the upper limit to sintering temperature. The activation energies of densification for the two temperature ranges viz. 800-1150 degrees C and 1150-1300 degrees C were found to be 365 kJ/mol and 2530 kJ/mol, respectively, through the construction of MSC. The MSC should be useful in predicting the densification behaviour and the final density and for designing a reproducible fabrication schedule for the LNN-12 ceramics. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2014-10-15T15:33:26Z
2014-10-15T15:33:26Z
2013
 
Type Article; Proceedings Paper
 
Identifier CERAMICS INTERNATIONAL, 39S65-S68
http://dx.doi.org/10.1016/j.ceramint.2012.10.036
http://dspace.library.iitb.ac.in/jspui/handle/100/15163
 
Language en