General Properties and Thermal Behaviour The density, ρ , of the samples demonstrates an increasing trend with the addition of Nb 2 O 5 ; see Figure 1 a.
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Exploring the Effect of V<sub>2</sub>O<sub>5</sub> and Nb<sub>2</sub>O<sub>5</sub> Content on the Structural, Thermal, and Electrical Characteristics of Sodium Phosphate Glasses and Glass-Ceramics.
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The sentences
While T g and σ DC show a decreasing trend, reaching their minimum values in the 25V-20Nb glass, V M follows a positive trend, reaching its peak with the same glass composition.
While σ DC shows a decreasing trend with increasing Nb 2 O 5 content, E DC exhibits an opposite trend compared with σ DC , as anticipated.