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Preparation and Piezoelectricity of NaNbO3 High‐Density Ceramics by Molten Salt Synthesis

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Nanostructures of crystalline orthorhombic sodium niobate (NaNbO3) were synthesized by a molten salt synthesis procedure. As a comparison, an auxiliary experiment via conventional solid state reaction process was carried out simultaneously. The microstructure and morphology evolution of the synthesized nano particles were investigated in detail, and on the basis of the experimental results, an in situ transformation mechanism has been proposed to elucidate the formation processes of NaNbO3 microstructures. It was found that both the initial shape of the Nb2O5 and the dissolution rate of the initial precursors critically determine the final shapes of the products. Furthermore, the determined electrical properties of the as‐obtained products indicated that NaNbO3 ceramic derived from nanostructures holds the real characteristic of ferroelectric and the polarization–electric field (P–E) hysteresis behavior is greatly influenced by the polarization treatment. The obtained NaNbO3 ceramic after the polarizing treatment exhibited piezoelectric property, d 33 = 28 pC/N.

Document Type: Research Article


Publication date: 2011-12-01

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