Influence of processing parameters on the structure and properties of barium strontium titanate ceramics
- School of Material Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055 (China)
- Department of Materials Physics, School of Science, Xi'an Jiaotong University, Xi'an 710049 (China)
Barium strontium titanate (BST) with the molar formula (Ba{sub 0.8}Sr{sub 0.2}TiO{sub 3}) has been prepared by two different processing methods: mixed-oxide (BST-MO) and reaction-sintering (BST-RS). X-ray powder diffraction study shows differences in grain size and crystal symmetry for both these ceramics. The former shows a tetragonal symmetry while the latter presents a cubic symmetry. The occurrence of polar micro-regions associated with the higher chemical non-homogeneous distribution of ion defects from the influence of the processing parameters is the main reason for the higher peak dielectric constant (K{sub m}), the higher remanent polarization (P{sub r}), the higher coercive field (E{sub c}), the higher peak current density (J{sub m}), and the lower temperature of peak dielectric constant (T{sub m}) in BST-MO ceramics.
- OSTI ID:
- 21144062
- Journal Information:
- Materials Research Bulletin, Vol. 43, Issue 8-9; Other Information: DOI: 10.1016/j.materresbull.2007.10.003; PII: S0025-5408(07)00441-2; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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