Crystallization Behavior of Ferroelectric Glass-Ceramics of the Na2O-Nb2O5-Al2O3-SiO2 System Contained TiO2

Anuson Niyompan; Kanita Srisurat; R. Tipakontitikul

doi:10.4028/www.scientific.net/KEM.421-422.189

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 421-422Crystallization Behavior of Ferroelectric...

Crystallization Behavior of Ferroelectric Glass-Ceramics of the Na₂O-Nb₂O₅-Al₂O₃-SiO₂ System Contained TiO₂

Abstract:

The ferroelectric glass-ceramic of the composition Na2O-Nb2O5-Al2O3-SiO2 was prepared by controlling crystallization of the glass that added with small amount of TiO2. The effect of TiO2 content on crystallization behavior and the dielectric property were determined. X-ray diffraction studied indicated that NaNbO3, NaNbO8 and a compound of alkali alumino silicate composition were readily formed in the as-quenched glass as the product of phase separation. After treatment at 700oC for various times, NaNbO3 volume fraction was found to increase with time. Crystalline size of the NaNbO3 was lower than 300 nm and it was developed with treatment time. Presence of TiO2 had considerably effect on NaNbO3 volume fraction when treatment time shorter than 1.0 h. The dielectric response of the glass-ceramic samples was found to arise from all contributions of crystalline phases and glass matrix responds.

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Key Engineering Materials (Volumes 421-422)

Pages:

189-192

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.421-422.189

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Online since:

December 2009

Authors:

Anuson Niyompan, Kanita Srisurat, R. Tipakontitikul

Keywords:

Crystallization, Ferroelectric Glass-Ceramic, Heat Treatment, Sodium Niobate

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