scholarly journals Fuel-free low-temperature self-combustion synthesis and characterization of praseodymium-substituted bismuth titanate ceramics

2012 ◽  
Vol 120 (1398) ◽  
pp. 58-63 ◽  
Author(s):  
Warapong KRENGVIRAT ◽  
Srimala SREEKANTAN ◽  
Ahmad-Fauzi b. MOHD NOOR ◽  
Atsunori MATSUDA ◽  
Charoen CHINWANITCHAROEN
Keyword(s):  
Low Temperature ◽  
Combustion Synthesis ◽  
Bismuth Titanate ◽  
Synthesis And Characterization ◽  
Titanate Ceramics

scholarly journals Synthesis and characterization of Ce and La modified bismuth titanate

2009 ◽  
Vol 3 (1-2) ◽  
pp. 88-95 ◽  
Author(s):  
Nikolina Pavlovic ◽  
Dejan Kancko ◽  
Mészáros Szécsényi ◽  
Vladimir Srdic
Keyword(s):  
Bismuth Titanate ◽  
Sol Gel ◽  
Pyrochlore Phase ◽  
Grain Morphology ◽  
The Other ◽  
Synthesis And Characterization ◽  
Second Phase ◽  
Titanate Ceramics ◽  
Different Content

Bismuth titanate based nanopowders with the different content of La or Ce were synthesized by the modified sol-gel method. After calcination at 600?C, in addition to Aurivillius layered structure, a small quantity of cubic pyrochlore phase was detected in the La modified powders, while this second phase was much more pronounced in the Ce substituted powders. In fact, as the powder with the highest amount of Ce (Bi3CeTi3O12) has the pure pyrochlore phase it seems that the presence of Ce stabilizes the formation of this phase. This different influence of cerium and lanthanum could be explained by the incorporation of their ions on the different sites in the titanate structure. Bismuth titanate based ceramics, sintered at 1050?C/2h, had densities above 93% of theoretical density and characteristic plate-like grain morphology. Small quantity of cubic pyrochlore phase was detected only in the Ce modified bismuth titanate ceramics. On the other hand, lanthanum addition caused formation of smaller grain size with pronounced plate-like morphology. .

Synthesis and Characterization of Nano CoFe[sub 2]O[sub 4] by Low-Temperature Combustion Synthesis Using Different Fuels

2011 ◽  
Author(s):  
D. M. Jnaneshwara ◽  
R. Gopala Krishna ◽  
H. Nagabhushana ◽  
B. M. Nagabhushana ◽  
C. Shivakumara ◽  
...  
Keyword(s):  
Low Temperature ◽  
Combustion Synthesis ◽  
Synthesis And Characterization ◽  
Low Temperature Combustion ◽  
Temperature Combustion

Self-Propagating Combustion Synthesis and Characterization of ODS Fe-Base Superalloy Powders

2013 ◽  
Vol 747-748 ◽  
pp. 641-646
Author(s):  
Cun Guang Chen ◽  
Zhi Meng Guo ◽  
Ji Luo ◽  
Wei Wei Yang ◽  
Jun Jie Hao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Combustion Synthesis ◽  
Malic Acid ◽  
Selective Reduction ◽  
Synthesis And Characterization ◽  
Mean Size ◽  
The Mean ◽  
Concentrated Solution ◽  
Base Superalloy

A new method was employed to synthesize nanosized Y2O3 dispersion strengthened Fe-base superalloy powders using self-propagating combustion. A concentrated solution of nitrates of iron and yttrium was used as oxidizer, malic acid as fuel to fabricate Fe2O3/Y2O3 powders at low temperature. Afterwards, uniform and fine Fe/2wt.%Y2O3 powders were obtained by selective reduction with hydrogen, on the surface of which dispersive Y2O3 particles of the mean size of 30 - 50 nm were observed.

Sign in / Sign up

Export Citation Format

Share Document