期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Study of Structural and Dielectrical Properties of Lead Free Polycrystalline Electro Ceramics Ba<SUB>5</SUB>CaTi<SUB>2</SUB>Nb<SUB>8</SUB>O<SUB>30</SUB>(BCTN) for Microwave Tunable Device Applications
1
作者 shilpi jindal Sheela Devi +1 位作者 Ajay Vasishth Gagan Kumar 《Materials Sciences and Applications》 2018年第1期55-67,共13页
Tungsten bronze structure ceramics have found vital potential in many applications such as actuators, transducer, electro-optic, ferroelectric random access memory and microwave devices. These type ceramics are extens... Tungsten bronze structure ceramics have found vital potential in many applications such as actuators, transducer, electro-optic, ferroelectric random access memory and microwave devices. These type ceramics are extensively used in many industrial applications due to their spontaneous polarization and well-known for its high dielectric constant, low dielectric loss, low leakage current density, good thermal stability and high piezoelectric coefficient. In present work, Ba5CaTi2Nb8O30 (BCTN) has been synthesized first time through solid state reaction method. The microstructures, dielectric, ferroelectric, ferromagnetic and Raman spectra have been investigated by means of X-ray diffraction, Scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), LCR meter, P-E loop tracer, VSM and Raman spectrometer respectively. X-ray dif-fraction study revealed the formation of single phase tetragonal structure with space group P4bm. The crystallite size was observed to be in the range 14.4 nm. Detailed dielectric properties of BCTN compound as function of temperature at different frequencies show that sample exhibits diffuse type transition at curie temperature 316&deg;C. The P-E and M-H studies confirmed the coexistent ferroelectricity and magnetism at room temperature. 展开更多
关键词 Ceramic X-Ray Diffraction Scanning Electron Microscopy Raman SPECTROMETER
下载PDF
Interdependence between electrical and magnetic properties of polycrystalline cobalt-substituted tungsten bronze multiferroic ceramics
2
作者 shilpi jindal Sheela Devi +2 位作者 Ajay Vasishth Khalid Mujasam Batoo Gagan Kumar 《Journal of Advanced Dielectrics》 CAS 2018年第1期17-24,共8页
Polycrystalline cobalt-substituted tungsten bronze ferroelectric ceramics with chemical composition Ba_(5)CaTi_(2-x)Co_(X)Nb_(8)O_(30)(x=0.00,0.02,0.04 and 0.08)were synthesized by solid state reaction technique.X-ray... Polycrystalline cobalt-substituted tungsten bronze ferroelectric ceramics with chemical composition Ba_(5)CaTi_(2-x)Co_(X)Nb_(8)O_(30)(x=0.00,0.02,0.04 and 0.08)were synthesized by solid state reaction technique.X-ray diffraction(XRD)technique was used to confirm the phase formation and it revealed the formation of single phase tetragonal structure with space group P4bm.The surface morphology of the samples was studied by using the scanning electron microscopy(SEM)technique.The dielectric properties such as dielectric constant and dielectric loss have been investigated as a function of temperature and frequency.The P-E and M-H studies confirmed the coexistent of ferroelectricity and magnetism at room temperature.The P-E loop study indicated an increase in the coercive field while the M-H study depicted a decrease in the magnetization with the incorporation of cobalt ions. 展开更多
关键词 Tungsten bronze solid state reaction technique:electrical properties magnetic properties
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部