Effect of cerium oxide (CeO2) additives on the dielectric properties of BaTiO3ceramics

ABSTRACTElectrical/dielectric properties of nanocrystalline cerium oxide have been studied using impedance spectroscopy, thermopower, and DC 4-point conductivity. The combined techniques identified the effect of poor electroding on impedance spectra. Incomplete contact between the specimen and the electrode induces an additional arc in the impedance spectra. The additional high resistance feature results from the geometric constriction of current flow at the specimen/electrode interface and can be misinterpreted as a grain boundary response. The defect chemistry, nonstoichiometry, and transport properties were investigated in nanoscale ceria and compared with those of microcrystalline material.

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Synthesis, structural characterization, and studies of magnetic and dielectric properties of Gd3+ doped cerium oxide (Ce0.90Gd0.10O2−δ)

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2021.158838 ◽

2021 ◽

Vol 865 ◽

pp. 158838

Author(s):

A. Bandyopadhyay ◽

B.J. Sarkar ◽

S. Sutradhar ◽

J. Mandal ◽

P.K. Chakrabarti

Keyword(s):

Dielectric Properties ◽

Cerium Oxide ◽

Structural Characterization ◽

Magnetic And Dielectric Properties

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Structural, Optical, Morphological and Dielectric Properties of Cerium Oxide Nanoparticles

Materials Research ◽

10.1590/1980-5373-mr-2015-0698 ◽

2016 ◽

Vol 19 (2) ◽

pp. 478-482 ◽

Cited By ~ 49

Author(s):

Devadoss Mangalam Durai Manoharadoss Prabaharan ◽

Karuppasamy Sadaiyandi ◽

Manickam Mahendran ◽

Suresh Sagadevan

Keyword(s):

Dielectric Properties ◽

Cerium Oxide ◽

Cerium Oxide Nanoparticles ◽

Oxide Nanoparticles

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Influence of Cerium Oxide (CeO2) Nanoparticles on the Structural, Morphological, Mechanical and Dielectric Properties of PVA/PPy Blend Nanocomposites

Materials Today Proceedings ◽

10.1016/j.matpr.2016.04.086 ◽

2016 ◽

Vol 3 (6) ◽

pp. 1864-1873 ◽

Cited By ~ 31

Author(s):

M.K. Mohanapriya ◽

Kalim Deshmukh ◽

M.Basheer Ahamed ◽

K. Chidambaram ◽

S.K. Khadheer Pasha

Keyword(s):

Dielectric Properties ◽

Cerium Oxide ◽

Ceo2 Nanoparticles ◽

Blend Nanocomposites

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Effects of CeO2 Additive on Property of Ba0.6Sr0.4TiO3-MgO Ceramics for Phase Shifter

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.275 ◽

2007 ◽

Vol 336-338 ◽

pp. 275-278

Author(s):

Xiao Hong Wang ◽

Wen Zhong Lu ◽

Gui Fen Fan ◽

Dong Xiang Zhou

Keyword(s):

Dielectric Constant ◽

Dielectric Properties ◽

Cerium Oxide ◽

Lattice Constant ◽

Phase Shifter ◽

Microwave Frequency ◽

Ferroelectric Material ◽

Doping Amount ◽

Barium Strontium ◽

Xrd Patterns

The effects of cerium oxide on the dielectric properties and tunable properties of barium strontium titanate/magnesia (40wt%Ba0.6Sr0.4TiO3-60wt%MgO) compound ferroelectric material for improving the properties of phase shifter were investigated. The mechanism was also presented and discussed. The XRD patterns analysis showed that with increasing quantities of cerium oxide x (wt%), the lattice constant of BST-MgO material first increased to x=0.4, then changed a little till x=1.2. Further additions of CeO2 decreased the lattice constant. The dielectric properties at 10 kHz and microwave frequency were studied. The addition of CeO2 influences the dielectric constant, loss tangent and tunability greatly. The permittivity decreased with increase of cerium oxide nearly linearly. The addition of CeO2 effectively decreased the loss in BSTM ceramic. Optimum doping amount of CeO2 reduced the high frequency loss tangents of BST-MgO compound which also ensured the moderate dielectric constant and tunability. When the doping amount of CeO2 is 1.2wt%, BST-MgO composite has the following properties: εr = 92.64, tanδ = 0.00449 (at 2.6166 GHz) and tunability = 9.67% (at 2kV/mm), it is suitable for ferroelectric phase shifter.

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