Structural, Dielectric, and Thermal Properties of Strontium Barium Niobate‐Doped Fused Silica Nanocomposites

摘要: Ferroelectric strontium barium niobate (SBN)-doped Na2O–B2O3–SiO2 (NBS) glass nanocomposites were prepared by dispersing sol–gel-derived SBN powder into fused NBS glass. Their structures characterized X-ray diffractometry and Raman spectroscopy. The dielectric constants measured as functions of frequency temperature using an impedance analyzer. ferroelectric-to-paraelectric-phase transition was studied differential scanning calorimetric analysis. Our results revealed that the embedded has lower phase heat than those bulk materials. activation energy, however, is larger ultra-fine powders. Pure tetragonal-phase can be obtained at annealing temperatures 750°–1000°C. are ∼32–46 ∼20–25 low frequencies radio frequencies, respectively, loss tangent <0.1 room in range. studies suggested additional reduction properties must made before these systems considered for application microwave