Preparation of BaTiO sub(3) ultrafine particles by micro-emulsion charring method
Ultrafine BaTiO sub(3) particles were prepared by a micro-emulsion charring (MEC) method. The MEC method consisted of two steps. The first step is the preparation of a water/oil micro-emulsion with BaTiO sub(3) elements, and the second is a low temperature firing process in N sub(2) atmosphere, whic...
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Veröffentlicht in: | Journal of materials science. Materials in electronics 2000-03, Vol.11 (2), p.139-143 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Ultrafine BaTiO sub(3) particles were prepared by a micro-emulsion charring (MEC) method. The MEC method consisted of two steps. The first step is the preparation of a water/oil micro-emulsion with BaTiO sub(3) elements, and the second is a low temperature firing process in N sub(2) atmosphere, which includes charring of oil in an emulsion and powdering BaTiO sub(3) particles with the char. The char formed around BaTiO sub(3) particles prevents an agglomeration of BaTiO sub(3) particles during firing. In the present experiment, the W/O ratio and the amount of emulsifier greatly influenced the size of droplets of the emulsion. The charring temperature was another important experimental factor in order to obtain the desired BaTiO sub(3) particles. The finally obtained BaTiO sub(3) charring powders were monodispersed spherical particles and the particle size was 0.1 mu m to 0.5 mu m. |
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ISSN: | 0957-4522 1573-482X |
DOI: | 10.1023/A:1008929431606 |