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

Abstract:

Article Preview

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

Info:

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 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

Export:

Price:

$35.00

[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.

In order to see related information, you need to Login.