Structural characteristics and dielectric properties of glass-ceramic nanocomposites of （Pb, Sr）Nb2O6-NaNbO3-SiO2

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. 8; pp. 1434 - 1438
• Main Author: 王磊 张庆猛 杜军
• Format: Journal Article
• Language: English
• Published: 2010
• Subjects: SiO2玻璃; X射线衍射; 介电常数; 介电性能; 纳米微结构; 陶瓷复合材料
• ISSN: 1003-6326

The structure and dielectric properties of （Pb,Sr）Nb2O6-NaNbO3-SiO2 glass-ceramics with different Pb and Sr contents were investigated. The XRD pattern of glass-ceramics without Sr substitution is different from that with Sr substitution, which indicates the existence of orthorhombic phase in the latter ones. TEM bright field observation shows nanosized microstructures, while for samples with Sr, typical eutectic microstrncture with separated crystallized bands is found in the glass matrix. Dielectric properties measurement of the samples indicates an obvious improvement of dielectric constant, dielectric loss, DC field and temperature dependence of dielectric constant when the molar ratio of Sr to Pb is 4：6.