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Mechanosynthesis of the ferroelectric materials Ba2ANb5O15 (A=K, Na, Li)
- Source :
- Journal of Alloys and Compounds. 424:231-236
- Publication Year :
- 2006
- Publisher :
- Elsevier BV, 2006.
-
Abstract
- A novel mechanochemical activation route was applied in order to obtain the Ba 2 ANb 5 O 15 (A = K, Na, Li) ferroelectric materials. The evolution of the 4BaO 2 :A 2 CO 3 :5Nb 2 O 5 powder mixtures during mechanical treatment and subsequent annealings, was followed by X-ray powder diffraction (XRD), thermal analysis and scanning electron microscopy (SEM). The sought bronze-type phases were mechanosynthesized after 48 h of treatment in a planetary mill. Very crystalline phases can be obtained with very important decreases in the temperatures and reaction times as compared with the traditional ceramic method. Dense ceramics were processed from mechanosynthesized precursors at relative low temperature, by a conventional-sintering route, and their dielectric properties characterized.
- Subjects :
- Materials science
Scanning electron microscope
Mechanical Engineering
Metals and Alloys
Mineralogy
Dielectric
Ferroelectricity
Chemical engineering
Mechanics of Materials
visual_art
X-ray crystallography
Materials Chemistry
visual_art.visual_art_medium
Mechanosynthesis
Ceramic
Thermal analysis
Powder diffraction
Subjects
Details
- ISSN :
- 09258388
- Volume :
- 424
- Database :
- OpenAIRE
- Journal :
- Journal of Alloys and Compounds
- Accession number :
- edsair.doi...........b2fdbf160c7f39b619f032bbeb76017d