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Abstract
Ferroelectric glass-ceramics of the Na2O-BaO-Nb2O5-SiO2 system were prepared from parent glass of composition 20Na2O-4BaO-26Nb2O5-50SiO2. Nd2O3 was systematically added in the range 0–3 mol% to the glass compositions as to study its effect on crystallization behavior of the glass and the dielectric properties of the associated glass-ceramics. Heat treatments of the as-quenched samples were performed at the selected temperatures referring to thermal properties that described by the differential thermal analysis. X-ray diffraction studies indicated that NaNbO3 and NaBa2Nb5O15 crystals formed as two main crystalline phases. Involvement of Nd3+ ions in the glass network suppressed precipitation of the NaBa2Nb5O15 phase. The dielectric constant measured at room temperature for glass-ceramic samples were found to sensitive to presence of NaBa2Nb5O15 phase. The present work showed that introduction of Nd3+ into the Na2O-BaO-Nb2O5-SiO2 glass-ceramics system induce slightly change of the dielectric properties.
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