Effect of cerium and lanthanum addition on mechanical properties of bismuth titanate ceramics(Conference Paper)
- aDepartment of Material Engineering, Faculty of Technology, University of Novi Sad, Novi Sad, Serbia
- bFaculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
Abstract
Cerium- and lanthanum- substituted bismuth titanate (Bi4-xAxTi3O12; where A=La or Ce,and x=0, 0.5 and 1) ceramics were prepared from nanopowders synthesized by coprecipitation method. The as-synthesized powders were calcined, uniaxially pressed and finally sintered at 1050°C. It was shown that sintering behaviour, phase composition and grain morphology of the obtained ceramics were influenced by the presence of lanthanum and especially cerium ions in the titanate structure. Mechanical properties (hardness and fracture toughness) were measured at room temperature on polished sample surfaces using a Vickers microhardness tester. The hardness values for of bismuth titanate based ceramics were in the range for some other important perovskite titanate, whereas their fracture toughness was somewhat higher. © (2009) Trans Tech Publications, Switzerland.
Indexed keywords
| Engineering controlled terms: | Bismuth compoundsCeramic materialsCerium compoundsHardnessLanthanum compoundsPerovskiteSintering |
|---|---|
| Engineering uncontrolled terms | As-synthesized powderBismuth titanateBismuth titanate ceramicsCeramicsCoprecipitation methodLanthanum additionsPerovskite titanatesVickers microhardness tester |
| Engineering main heading: | Fracture toughness |
- ISSN: 10139826
- CODEN: KEMAE
- Source Type: Book Series
- Original language: English
- DOI: 10.4028/www.scientific.net/KEM.409.330
- Document Type: Conference Paper
- Publisher: Trans Tech Publications Ltd
Pavlovic, N.; Department of Material Engineering, Faculty of Technology, University of Novi Sad, Serbia;
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