Abstract
Nano-sized Ba 0.7Sr 0.3TiO 3 powders are prepared by post-treatment of the precursor powders with hollow and thin wall structure at temperatures between 900 and 1100°C. Ethylenediaminetetraacetic acid and citric acid improve the hollowness of the precursor powders prepared by spray pyrolysis. The mean sizes of the powders post-treated at temperatures of 900, 1000 and 1100°C are 42, 51 and 66 nm, respectively. The densities of the Ba 0.7Sr 0.3TiO 3 pellets obtained from the powders post-treated at 900, 1000 and 1100°C are each 5.36, 5.55 and 5.38 g cm -3 at a sintering temperature of 1300°C. The pellet obtained from the powders post-treated at 1000°C has higher maximum dielectric constant than those obtained from the powders post-treated at 900 and 1100°C.
Original language | English |
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Pages (from-to) | 4029-4033 |
Number of pages | 5 |
Journal | Ceramics International |
Volume | 38 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2012 Jul |
Externally published | Yes |
Bibliographical note
Funding Information:This research was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-50210 ). This study was also supported by Seoul R&BD Program (WR090671).
Keywords
- Barium strontium titanate
- C. Dielectric properties
- Nano powders
- Spray pyrolysis
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry