Microstructural and Electrical Characterisation of LaxBa1-xTi1-xYxO3 (0≦ x≦ 0.50) Ceramics

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LaxBa1-xTi1-xYxO3 (0≤x≤0.5) powders were synthesised in air at 1400°C by the conventional solid state method. According to the X-ray results, the tetragonal distortion in undoped (x=0) BaTiO3 (space group P4mm) decreases with x and samples with x ≥0.05 show cubic symmetry (space group Pm3m). For x≥0.05, the lattice parameter increases linearly with x, until orthorhombic LaYO3 appears as a secondary phase for x>0.45. Dielectric properties of dense (>95% of the theoretical X-ray density) ceramics were studied at both radio and microwave frequencies. The permittivity maximum is shifted towards lower temperatures with increasing x and a broad permittivity peak is observed for samples with 0.05

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Periodical:

Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara

Pages:

873-876

DOI:

10.4028/www.scientific.net/KEM.317-318.873

Citation:

A. Feteira, D. C. Sinclair, M. Lanagan, "Microstructural and Electrical Characterisation of LaxBa1-xTi1-xYxO3 (0≦ x≦ 0.50) Ceramics", Key Engineering Materials, Vols. 317-318, pp. 873-876, 2006

Online since:

August 2006

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$35.00

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