Effect of CeO2 and Nd2O3 on the Microstructure and Microwave Dielectric Properties of (Zr0.8,Sn0.2)TiO4 Ceramics

(Zr 0.8 ,Sn 0.2 )TiO 4 (ZST) ceramics were prepared by solid-state reaction method with 1 wt% ZnO and 0.5-1.5 wt% CeO 2 or Nd 2 O 3 as sintering aids. The effect of processing parameters and additive concentration on the structure, microstructure and microwave dielectric properties of ZST ceramics w...

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Bibliographic Details
Published in:Integrated ferroelectrics 2010-01, Vol.117 (1), p.118-128
Main Authors: Pamu, D., Rao, G. Lakshmi Narayana, Saravanan, K. Venkata, Raju, K. C. James
Format: Article
Language:English
Subjects:
Additives
Ceramics
Density
Dielectric constant
Dielectric properties
Dielectric resonators
Grain size
Microstructure
microwave dielectric constant
Microwave dielectric loss
Microwaves
Quality factor
Rare earth additives
Sintering
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Summary:(Zr 0.8 ,Sn 0.2 )TiO 4 (ZST) ceramics were prepared by solid-state reaction method with 1 wt% ZnO and 0.5-1.5 wt% CeO 2 or Nd 2 O 3 as sintering aids. The effect of processing parameters and additive concentration on the structure, microstructure and microwave dielectric properties of ZST ceramics were investigated. The dielectric constant (ϵ r ) and temperature coefficient of the resonance frequency (τ f ) were not significantly affected by the addition of these additives. The unloaded quality factors (Q u ) were effectively promoted by CeO 2 and Nd 2 O 3 additions. ϵ r values of 40 and 38.3, Qxf o values of 57,500 and 59,300 were obtained for the samples sintered with 1.5 and 0.5 wt% of CeO 2 and Nd 2 O 3 respectively. The improvement in Qxf o value is primarily attributed to the increase in uniform grain size and density.
ISSN:1058-4587
1607-8489
DOI:10.1080/10584587.2010.489454