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Synthesis and Sintering of (K,Na)NbO3 Based Ceramics

Published online by Cambridge University Press:  11 February 2011

Barbara Malic ,
Darja Jenko ,
Janez Bernard ,
Jena Cilensek  and
Marija Kosec
Barbara Malic
Affiliation:
Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
Darja Jenko
Affiliation:
Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
Janez Bernard
Affiliation:
Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
Jena Cilensek
Affiliation:
Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
Marija Kosec
Affiliation:
Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
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Abstract

Stoichiometric K0.5Na0.5NbO3 solid solution(KNN) was prepared by solid-state synthesis from alkaline carbonates and niobium oxide. Thermal decomposition of the powder mixture occurs upon heating to 700 °C followed by crystallization of the perovskite phase. After sintering at 1100 °C, 2h the stoichiometric KNN reaches 94 % of theoretical density. Dielectric constant of stoichiometric KNN is 620, and the losses 0.03.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 755: Symposium DD – Solid-State Chemistry of Inorganic Materials IV , 2002 , DD4.4
Copyright
Copyright © Materials Research Society 2003

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