Investigation of Structural, Dielectric and Electrical Properties of Barium Titanate Ceramics Co-Doped with Bismuth and Yttrium

被引:13
作者
Islam, Suravi [1 ]
Satter, Syed Abdus [2 ]
Khatun, Nazia [1 ]
Hossain, Mohammad Sajjad [1 ]
Farhad, Syed Farid Uddin [1 ]
Bala, Parimal [2 ]
Tabassum, Samia [3 ]
Siddika, Ayesha [3 ]
机构
[1] BCSIR, Ind Phys Div, Dhaka 1205, Bangladesh
[2] Jagannath Univ, Dept Phys, Dhaka 1000, Bangladesh
[3] BCSIR, Inst Fuel Res Dev IFRD, Dhaka 1000, Bangladesh
关键词
BaTiO3; dielectric properties; DC resistivity; dielectric constant; BATIO3; TEMPERATURE; ADDITIVES;
D O I
10.1142/S2251237319500060
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Bismuth and Yttrium co-doped Barium Titanate (BaTiO3) ceramics with the general formula (Ba1-xBiX) (YxTi1-x) O-3 (where x = 0.00, 0.01, 0.03, 0.05) have been synthesized at 1300 degrees C for 3 h by the standard solid-state reaction method. The prepared samples were characterized by X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and Impedance Analyzer. Temperature-dependent dielectric properties of the samples were also measured. The XRD result revealed perovskite structure for un-doped and co-doped BaTiO3 with tetragonal phase. However, with increasing doping concentration, a Pseudo cubic phase occurs also confirmed by the twin peaks (002) and (200) of XRD pattern. From SEM micrograph, submicron size particles were observed for all synthesized BaTiO3 samples and exhibit a narrow size distribution with quiet uniform morphology. The crystalline size for un-doped BaTiO3 found was 24.26 nm, the size decreases (minimum 19.59 nm for x = 0.03) for all compositions of co-doped BaTiO3. Dielectric constant values were apparently high and direct current (DC) resistivity follows a decreasing trend at higher doping concentration. The sample doped with x = 0.01 shows minimum DC resistivity and maximum dielectric constant among the samples investigated.
引用
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页数:9
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