3 Citations (Scopus)

Abstract

We report the effect of Ni-doping on the structural, dielectric and optical properties of Ba(Cd1/3Ta2/3)O3 (BCT) ceramics. Rietveld analysis of the X-ray diffraction (XRD) data indicates that the BCT structure is similar to other Ba(Bi1/3 &primeB 2/3 &Prime)O3 perovskites, although the Ta-P-Cd is distorted to an angle of ∼173°; very close to our earlier theoretical prediction of 172°. The XRD analysis also indicates that Ni doping significantly enhances the extent of Cd-Ta ordering in BCT. The temperature coefficient of resonant frequency decreases with Ni concentration up to 2wt%. While the loss tangent of BCT is reduced at small levels of Ni doping (up to 0.5 wt%), it increases abruptly at higher concentrations. We found a correlation between the loss tangent of Ni-doped BCT samples and the intensity of a continuous absorption background in the optical spectra. This optical activity results from the presence of optically active point defects and is suggestive that these defects play an important role in the microwave loss in BCT ceramics.

Original languageEnglish (US)
Pages (from-to)9140-9142
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number12
DOIs
StatePublished - Dec 15 2006

Fingerprint

Barium
Cadmium
Dielectric properties
cadmium
barium
dielectric properties
Structural properties
Optical properties
Doping (additives)
ceramics
tangents
optical properties
Rietveld analysis
optical activity
Point defects
perovskites
diffraction
point defects
X ray diffraction analysis
resonant frequencies

Keywords

  • Barium cadmium tantalate
  • Microwave ceramics
  • Optical properties

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Structural, dielectric, and optical properties of Ni-doped barium cadmium tantalate ceramics. / Liu, Hongxue; Liu, Shaojun; Zenou, Victor Y.; Beach, Cameron; Newman, Nathan.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 45, No. 12, 15.12.2006, p. 9140-9142.

Research output: Contribution to journalArticle

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