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Title: | Influence of the preparation method on the microstructure and physicochemical properties of the (Ca,Bi)[3]Co[4]O[9+?] cobaltites |
Authors: | Matsukevich, I. V. Klyndyuk, A. I. |
Keywords: | керамика свойства керамики кобальтиты термоэлектрические свойства |
Issue Date: | 2012 |
Publisher: | BSTU |
Citation: | Matsukevich,I. V. Influence of the preparation method on the microstructure and physicochemical properties of the (Ca,Bi)[3]Co[4]O[9+?] cobaltites / I. V. Matsukevich, A. I. Klyndyuk // Proceedings of BSTU. Issue 3 : Chemistry and technology of inorganic substances. – Minsk : BSTU, 2012. – P. 39-44 |
Abstract: | The ceramic samples of the (Ca,Bi)3Co4O9+? were prepared using solid-state reactions and citrate methods. The influence of the preparation method on the crystal and microstructural, physicochemical and functional characteristics of these materials was studied. The temperature-time processing regimes of the (Ca,Вi)3Co4O9+? ceramics were selected. It is found that Ca2.8Bi0.2Co4O9+? solid solution, which was prepared by a citrate method, demonstrated the maximal value of the power factor (240 ?W/(m · K2) at 1,100 K) among the ceramics prepared. It is shown that citrate method has significant advantages in comparison with the solid-state reactions one because it allows to reduce energy consumption during the synthesis and at the same time to prepare more dense, fine-grained, and electrically conducting ceramics with a lower linear thermal expansion coefficient and higher power factor. |
URI: | https://elib.belstu.by/handle/123456789/6566 |
Appears in Collections: | 2012, № 3 |
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