Volume 1 Number 3 (Nov. 2011)
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IJAPM 2011 Vol.1(3): 181-184 ISSN:2010-362X
DOI: 10.7763/IJAPM.2011.V1.35

Dielectric and Thermal Studies of ANb2O6 (A=Ca, Mg, Cu, Ni) for LTCC Application

Jyotirmayee Satapathy and M. V. Ramana Reddy

Abstract—A series of ANb2O6 (A=Ca, Mg, Cu, Ni) columbites and 50% Ni doped with CaNb2O6,MgNb2O6 and CuNb2O6 ha s been prepared using sol-gel technique. The samples were sintered at 9000C for 6 hours. Structural characterization of the prepared samples has been done using X-ray diffraction (XRD) method. To study their applicability in low temperature cofired ceramic (LTCC) technology, dielectric and thermal properties have been characterized. Microwave dielectric properties like dielectric constant and Qf values over Ku-band for all the compositions have been measured. Dielectric constant was found to fall between 4.8 to 10. Thermal properties like thermal conductivity and thermal coefficient of expansion (TCE) were measured over a temperature range from room temperature to 900 0C. Thermal conductivity was found to be of the order of 1-2 W/m 0K while TCE was of the order of 5-10 x 10-6/0C. TCE of some of the compositions have shown negative value at 900 0C.

Index Terms—Ltcc, sol-gel, dielectric constant, niobates, ku-band, thermal conductivity, thermal coefficient of expansion.

Jyotirmayee Satapathy and M. V. Rama na Reddy are with department of physics, Osmania university, Hyderabad.

 

Cite: Jy otirmayee Satapathy and M. V. Ramana Reddy, "Dielectric and Thermal Studies of ANb2O6 (A=Ca, Mg, Cu, Ni) for LTCC Application," International Journal of Applied Physics and Mathematics  vol. 1, no. 3, pp. 181-184, 2011.

General Information

ISSN: 2010-362X
Frequency: Bimonthly (2011-2014); Quarterly (Since 2015)
DOI: 10.17706/IJAPM
Editor-in-Chief: Prof. Haydar Akca
Abstracting/ Indexing: Index Copernicus, EI (INSPEC, IET), Chemical Abstracts Services (CAS), Electronic Journals Library, Engineering & Technology Digital Library, Nanowerk Database, Google Scholar and ProQuest
E-mail: ijapm@iap.org
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