Structural, morphological, magnetic hysteresis and dielectric properties of cobalt substituted barium-lead hexagonal ferrites for technological applications

被引:20
作者
Chauhan, Chetna C. [1 ]
Gupta, Tanuj M. [1 ,2 ]
Nandotaria, Reshma A. [3 ]
Gor, Abhishek A. [2 ,4 ]
Sandhu, Charanjeet Singh [5 ]
Jotania, Kanti R. [6 ]
Jotania, Rajshree B. [7 ]
机构
[1] Nirma Univ, Inst Technol, Ahmadabad 382481, Gujarat, India
[2] Nirma Univ, Inst Sci, Ahmadabad 382481, Gujarat, India
[3] Girish Raval Sci Coll, Gandhinagar 382355, Gujarat, India
[4] Pandit Deendayal Petr Univ, Sch Technol, Dept Phys, G, Gandhinagar 382007, India
[5] Lovely Profess Univ, Sch Elect & Elect Engn, Phagwara 144411, Punjab, India
[6] Maharaja SayajiraoUniv Baroda, Fac Sci, Dept Phys, Vadodara 390002, Gujarat, India
[7] Gujarat Univ, Univ Sch Sci, Dept Phys Elect & Space Sci, Ahmadabad 380009, Gujarat, India
关键词
Ba0.4Pb0.6Fe12-xCoxO19; hexaferrites; FTIR; XRD; M-H loops; Dielectric properties; ELECTRICAL-PROPERTIES; ABSORBING PROPERTIES; CRYSTAL-STRUCTURE; SOL-GEL; ZN; CO; FREQUENCY; BEHAVIOR;
D O I
10.1016/j.ceramint.2021.06.166
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
M-type, Ba0.4Pb0.6Fe12-xCoxO19 (x = 0.00, 0.10, 0.20, 0.30, 0.40) hexaferrites, synthesized using citrate gel auto combustion method, and heated at 950 degrees C, 4 h for lossless applications. XRD analysis shows the development of the M-phase, along with PbM and hematite. The microstructural analysis reveals the stacking clusters of hexagonally shaped platelets. TEM image and SAED pattern of x = 0.3 composition shows polycrystalline nature and formed particles observed to fused with neighbouring particles. M - H loops of all samples reveal hard magnetic behaviour and possess multi-domain structure. The maximum saturation magnetization of 55.427 A m(2)/kg is observed in x = 0.10 composition and coercivity of prepared hexaferrites was found to vary from 0.058 T to 0.390 T. The cobalt substitution has a strong influence on the dielectric properties of prepared hexaferrites. The value of ac conductivity increases with cobalt substitution from x = 0.00 to x = 0.10, and followed by a reduction from x = 0.10 to x = 0.40. The same trend is observed for the dielectric constant. The low value of loss tangent for all compositions shows apt scope for lossless application.
引用
收藏
页码:27441 / 27452
页数:12
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