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Synthesis of nano-crystalline potassium sodium niobate ceramic using mechanochemical activation

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Title Synthesis of nano-crystalline potassium sodium niobate ceramic using mechanochemical activation
 
Creator SINGH, R
PATRO, PK
KULKARNI, AR
HARENDRANATH, CS
 
Subject Dielectric properties
Ferroelectric properties
KNN
Mechanochemical activation
DIELECTRIC-PROPERTIES
PIEZOELECTRIC PROPERTIES
MECHANICAL ACTIVATION
K0.5NA0.5NBO3
POWDERS
COMPLEX
SYSTEM
 
Description Single phase nano-crystalline K0.5Na0.5NbO3 (KNN) ceramic has been successfully synthesized by the mechanochemical activation method. High energy ball milling was carried out on a mixture of K2CO3, Na2CO3 and Nb2O5 powders for different times (6 h, 12 h, 24 h and 32 h). The 32 h mechanically activated sample was calcined at 550 degrees C for 2 h. This is about 300 degrees C lower as compared with conventional solid state reaction. X-ray diffraction pattern of calcined sample revealed single phase perovskites structure with orthorhombic phase. Particle size of these powders was measured using DLS. The Morphology of mixture powder, before and after calcination, was examined under FEG-SEM. Dielectric, ferroelectric and piezoelectric properties were evaluated and compared with reported results using other competing techniques. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2014-12-28T16:53:53Z
2014-12-28T16:53:53Z
2014
 
Type Article
 
Identifier CERAMICS INTERNATIONAL, 40(7)10641-10647
0272-8842
1873-3956
http://dx.doi.org/10.1016/j.ceramint.2014.03.047
http://dspace.library.iitb.ac.in/jspui/handle/100/16935
 
Language English