Effect of Boron Addition on the Dielectric Properties of Giant Dielectric CaCu3Ti4O12

The recently discovered giant dielectric CaCu 3 Ti 4 O 12 (CCTO) has been reported to show dielectric constant value as high as 80,000 for single crystals and around 10,000 for ceramics. However the dielectric constant is also associated with high dissipation factor. In the present study, it has bee...

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Bibliographic Details
Published in:Ferroelectrics 2005-01, Vol.326 (1), p.103-108
Main Authors: Mazumder, Ranabrata, Seal, Anshuman, Sen, Amarnath, Maiti, Himadri Sekhar
Format: Article
Language:English
Subjects:
CaCu
Condensed matter: electronic structure, electrical, magnetic, and optical properties
dielectric
Dielectric properties of solids and liquids
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
ferroelectric
Niobates, titanates, tantalates, pzt ceramics, etc
Physics
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Summary:The recently discovered giant dielectric CaCu 3 Ti 4 O 12 (CCTO) has been reported to show dielectric constant value as high as 80,000 for single crystals and around 10,000 for ceramics. However the dielectric constant is also associated with high dissipation factor. In the present study, it has been observed that the loss factor of CCTO can be reduced by B 2 O 3 addition. The low frequency dispersion of CCTO ceramics, which indicates Maxwell-Wagner type relaxation, is reduced by boron addition. Also the temperature dependence of dielectric constant is minimized by boron addition. From the present work it can be surmised that B 2 O 3 addition can favourably modify the dielectric properties of CCTO ceramic for its practical applications as a capacitor material.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150190500318644