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Journal Publication
Title of Article Microstructural evolution and strongly enhanced dielectric response in Sn-doped CaCu3Ti4O12/CaTiO3 ceramic composites 
Date of Acceptance 16 January 2016 
Journal
     Title of Journal Materials Research Bulletin 
     Standard SCOPUS 
     Institute of Journal Elsevier Ltd. 
     ISBN/ISSN  
     Volume  
     Issue 77 
     Month
     Year of Publication 2016 
     Page 178–184 
     Abstract Sn4+-doped CaCu3Ti4O12/CaTiO3 composites were prepared using a solid state reaction method employing a simple one-step process. A minor phase of CaTiO3 grains was very well dispersed into the CaCu3Ti4O12 matrix and these two phases were clearly separated from each other in CaTiO3/CaCu3Ti4O12. The grain size of the CaCu3Ti4O12 phase was largely enhanced by Sn4+ doping. Furthermore, CaTiO3 grains were also found inside the enlarged CaCu3Ti4O12 grains. The microstructural evolution can be described based upon liquid phase sintering and the pinning effect by second-phase particles. The dielectric permittivity of Sn4+-doped CaCu3Ti4O12/CaTiO3 was greatly enhanced from 2 103 to 0.6–1.3 104 at103 Hz, while, the dielectric loss tangent was still low. The nonlinear properties were degraded as a main result of microstructural evolution. These results strongly indicated an extrinsic effect upon both of the giant dielectric response and nonlinear properties of CaCu3Ti4O12-based compounds.Ceramics  
     Keyword Ceramics A. Composites, Microstructure, Impedance spectroscopy, Dielectric properties 
Author
577020051-2 Mr. JUTAPOL JUMPATAM [Main Author]
Science Doctoral Degree

Reviewing Status มีผู้ประเมินอิสระ 
Status ตีพิมพ์แล้ว 
Level of Publication นานาชาติ 
citation true 
Part of thesis true 
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