Effect of Strontium Substitution on Impedance Properties of Ba<sub>5</sub>GdTi<sub>3</sub>V<sub>7</sub>O<sub>30</sub>Ceramics

• 作者: Bala Krushna Giri Bana Bihari Mohanty Jagata Nanda Panda Priyadarshini Sanghamitra Sahoo Ram Naresh Prasad Choudhary
• 来源期刊: 现代物理(英文)
• 学科: 化学
• 关键词: Ferroelectrics Complex IMPEDANCE SPECTROSCOPY Electrical Conduction Modulus SPECTROSCOPY
• 年，卷（期）: 2018,（4）
• 页码范围: 620-627
• 页数: 8页
• 分类号: O6

摘要

A series of compounds Ba5-xSrxGdTi3V7O30 (x = 0 - 5), belonging to tungsten bronze family were prepared by a high-temperature solid-state reaction route. Using X-Ray diffraction technique and Scanning Electron Micrograph, the formation and surface morphology of the compounds were studied. The X-Ray diffraction study informs the formation of single-phase orthorhombic structures. The substitution of Sr ion with increasing concentration in the compounds as per formula resulted in a variation of the electrical properties. Study of electrical properties using impedance analyzer exhibits: 1) the presence of negative temperature coefficients of resistance (NTCR) behavior;2) presence of temperature dependent electrical relaxation phenomena;3) evidences of single electrical relaxation attributed to the presence of bulk contribution to the electrical properties for pure Ba5GdTi3V7O30 compound;4) an enhancement in the barrier to the mobility of charge carriers on Sr-substitution. The effects of Sr on changes in the electrical conductivity as a function of temperature at different frequency are described based on impedance spectrum analysis.