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



Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara




A. Feteira et al., "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




[1] J. Zhi, A. Chen, Y. Zhi, P.M. Vilarinho, J.L. Baptista, J. Am. Ceram., vol. 82.

[5] 1345-48 (1999).

[2] F.D. Morrison, D.C. Sinclair ad A.R. West, J. Am. Ceram. Soc., 2001, vol.

[84] 531- 38 (2001).

[3] A. Feteira, R. Elsebrock, A. Dias, R.L. Moreira, M.T. Lanagan and D.C. Sinclair, J. Eur. Cer. Soc., in print.