Effects of NaNbO3 Crystals on Electrical Properties of K0.5Na0.5NbO3 Ceramics

Chavalit Suksri; Piewpan Parjansri; Sutatip Thonglem; Uraiwan Intatha; Sukum Eitssayeam; Tawee Tunkasiri

doi:10.4028/www.scientific.net/KEM.690.126

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 690Effects of NaNbO3 Crystals on Electrical...

Effects of NaNbO₃Crystals on Electrical Properties of K_0.5Na_0.5NbO₃ Ceramics

Abstract:

Lead-free (K_0.5Na_0.5)NbO₃ (KNN) piezoelectric ceramics were studied and synthesized by the seed-induced method. NaNbO₃ crystal was used as seed and prepared by molten salt synthesis (MSS). The average particles size of NaNbO₃ seed crystal was about 1-3 mm. Then, the NaNbO₃ seed was mixed with KNN powder and ball milled for 24 h. The mixed powder was calcined at 700-900 °C and sintered at 1100 °C. The phase structure and morphology of the ceramics were investigated by X-ray diffraction and scanning electron microscope and the electrical properties were studied. The results indicated that all samples showed a pure perovskite phase. The highest density of the ceramic was 93% compared to the theoretical density. The results showed that NaNbO₃seed crystal improved piezoelectric properties of KNN ceramics.

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Periodical:

Key Engineering Materials (Volume 690)

Pages:

126-130

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.690.126

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May 2016

Authors:

Chavalit Suksri, Piewpan Parjansri, Sutatip Thonglem, Uraiwan Intatha, Sukum Eitssayeam, Tawee Tunkasiri*

Keywords:

KNN, Molten Salt, NaNbO₃, Seed-Induced Method

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