Hydrothermal Synthesis of BaTiO3 Nanopowders Using TiO2 Nanoparticles. Issue 2 (23rd December 2013)

• Record Type: Journal Article
• Authors: Han, Jae‐Min; Joung, Mi‐Ri; Kim, Jin‐Seong; Lee, Youn‐Seon; Nahm, Sahn; Choi, Youn‐Kyu; Paik, Jong‐Hoo
• Editors: Suvaci, E.
• Is Part Of: Journal of the American Ceramic Society. Volume 97:Issue 2(2014)
• Page Start: 346
• Page End: 349
• Publication Date: 2013-12-23
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12755
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract : Anatase TiO2 nanoparticles, obtained by hydrolyzing titanium isopropoxide in distilled water, were used to synthesize BaTiO3 (BT) nanopowder by the hydrothermal method. When titanium isopropoxide was used, BT nanopowder with a low tetragonality of 1.0070 was formed because of the presence of OH − ions in the oxygen sites and Ba vacancies. However, by changing the titanium source from titanium isopropoxide to TiO2 nanoparticles, a homogeneous BT nanopowder with similar particle size and a high tetragonality of 1.0081 was synthesized. The size of the BT nanopowder particles was decreased by reducing the synthesis time. In particular, the BT nanopowder that was synthesized at 220°C for 16 h with a Ba/Ti molar ratio of 4.0 exhibited a high tetragonality of 1.0083 and a small particle size of 126.0 nm.