Effect of Mn/Co substitutions on the resistivity and dielectric properties of nickel-zinc ferrites

被引：33

作者：

Ramesh, S. ^{[1
]}

Dhanalakshmi, B. ^{[3
]}

Sekhar, B. Chandra ^{[2
]}

Rao, P. S. V. Subba ^{[3
]}

Rao, B. Parvatheeswara ^{[3
]}

机构：

[1] GITAM Univ, Sch Technol, Bengaluru Rural 561203, India

[2] Vignans Inst Engn Women, Visakhapatnam 530046, Andhra Pradesh, India

[3] Andhra Univ, Dept Phys, Visakhapatnam 530003, Andhra Pradesh, India

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 08期

关键词：

Ni-Zn ferrite; Sol-gel autocombustion; Dc resistivity; Dielectric constant; Conduction mechanism; MAGNETIC-PROPERTIES; COPRECIPITATION; MICROSTRUCTURE; PARTICLES; FE3O4; CO;

D O I：

10.1016/j.ceramint.2016.03.043

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：

Nickel-zinc ferrite nanoparticles with suitable chemical modifications by Mn or Co substitutions for Zn as two systems (namely, Ni-Zn-Mn and Ni-Zn-Co) were synthesized by sol-gel autocombustion method. X-ray diffraction measurements on the synthesized nanoparticles confirm that the samples attain single phase cubic spinel structures only. The powders were then used to obtain pellets in desired dimensions by employing usual ceramic procedure for carrying out measurements of resistivity and dielectric properties. The variations of dc resistivity as a function of composition and temperature, and the corresponding variation of activation energies for both the systems are presented and discussed. Also, the results of dielectric constant as a function of substituent concentration, dielectric dispersion and dielectric loss tangent are discussed. Effect of Mn/Co substitutions in Ni-Zn ferrites and possible mechanisms responsible for variations in resistivity and dielectric properties of both the ferrite systems have been evolved independently. Also, comparison of the trends between the dielectric constant and the resistivity with substituents' concentration and their inter-relation with conduction mechanisms has been thoroughly analyzed for both the ferrite systems. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：9591 / 9598

页数：8

共 33 条

[21] Influence of V2O5 additions on the permeability and power loss characteristics of Ni-Zn ferrites [J].

Rao, B. Parvatheeswara ;

Kim, Chong-Oh ;

Kim, CheolGi .

MATERIALS LETTERS, 2007, 61 (07) :1601-1604

[22] Effect of sintering conditions on resistivity and dielectric properties of Ni-Zn ferrites [J].

Rao, BP ;

Rao, KH .

JOURNAL OF MATERIALS SCIENCE, 1997, 32 (22) :6049-6054

[23] RELAXATION PROCESSES IN COBALT SUBSTITUTED NI-ZN FERRITES [J].

ROSENBERG, M ;

VELICESCU, M .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1970, 28 (01) :264-+

[24] Structural disorder in mechanosynthesized zinc ferrite [J].

Sepelak, V ;

Steinike, U ;

Uecker, DC ;

Wissmann, S ;

Becker, KD .

JOURNAL OF SOLID STATE CHEMISTRY, 1998, 135 (01) :52-58

[25] REVISED EFFECTIVE IONIC-RADII AND SYSTEMATIC STUDIES OF INTERATOMIC DISTANCES IN HALIDES AND CHALCOGENIDES [J].

SHANNON, RD .

ACTA CRYSTALLOGRAPHICA SECTION A, 1976, 32 (SEP1) :751-767

[26]

Shokrollahi H, 2006, IRAN J SCI TECHNOL B, V30, P413

[27]

Smit J., 1959, FERRITES

[28] DIELECTRIC PROPERTIES OF AND CONDUCTIVITY IN FERRITES [J].

VANUITERT, LG .

PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1956, 44 (10) :1294-1303

[29] Dielectric properties of NiZn ferrites prepared by the citrate precursor method [J].

Verma, A ;

Goel, TC ;

Mendiratta, RG ;

Alam, MI .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1999, 60 (02) :156-162

[30] PHYSICAL PROPERTIES AND CATION ARRANGEMENT OF OXIDES WITH SPINEL STRUCTURES .2. ELECTRONIC CONDUCTIVITY [J].

VERWEY, EJ ;

HAAYMAN, PW ;

ROMEIJN, FC .

JOURNAL OF CHEMICAL PHYSICS, 1947, 15 (04) :181-187

← 1 2 3 4 →