Study of PbO-SrO-TiO₂-B₂O₃ glass and glass ceramics

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• 作者：J. Shankar^a ; V.K. Deshpande^b ; ^{vkdeshpande@phy.vnit.ac.in}
• 关键词：Thermal expansion ; Glass ; Ferroelectric glass ceramics ; Dielectric properties ; Ferroelectric hysteresis
• 刊名：Physica B
• 出版年：2012
• 期刊代码：53_09214526
• 类别：ph
• 出版时间：15 June, 2012
• 卷：407
• 期：12
• 页码：2160-2163
• 文件大小：613 K

摘要

The glasses with composition (50鈭?em>X)PbO-XSrO-25TiO₂-25B₂O₃ (where X=0, 5, 10 and 15 mol%) were prepared using conventional quenching technique. The T_g, T_c, density and CTE of the glass samples were measured. The T_g observed to increase with increasing concentration of SrO, while the T_c first decreased and then increased. The glass samples were converted to glass ceramics by following two stage heat treatment schedule. The glass ceramic samples were characterized by XRD, SEM and dielectric measurements. The XRD results revealed the formation of ferroelectric lead titanate as a major crystalline phase in glass ceramics. Additional phases observed include Sr₂B₂O₅ and PbB₂O₄. The room temperature (RT) dielectric constant of glass and glass ceramics are in the range of 100-120 which is promising for capacitor application.