Science of Sintering 2005 Volume 37, Issue 1, Pages: 61-67
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Mechanochemical synthesis of NaNbO3, KNbO3 and K0.5Na0.5NbO3

Rojac T., Kosec M., Malič B., Holc J.

Mechanochemical synthesis of the K0.5Na0.5NbO3 solid solution (KNN) is studied. In order to explore the mechanochemical interactions between the constituents in the Na2CO3 - K2CO3 - Nb2O5 system, NaNbO3 and KNbO3 as the boundary compositions of the KNN solid solution are also studied. It has been shown that NaNbO3 can be prepared by a single-step mechanochemical synthesis, while in the case of K2CO3 and Nb2O5, and Na2CO3, K2CO3 and Nb2O5 mixtures, only amorphisation occurs even after prolonged milling.

Keywords: mechanochemical synthesis, niobates, solid solution, milling