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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.15 [2008] >
IJEMS Vol.15(1) [February 2008] >
| Title: | Synthesis of bismuth titanate (Bi₄Ti₃O₁₂) powders via calcination of microwave-hydrothermally (MH) derived precursor |
| Authors: | Khollam, Y B
Deshpande, S B
Samuel, V
Potdar, H S |
| Keywords: | Bi₄Ti₃O₁₂
MH processing
XRD
SEM |
| Issue Date: | Feb-2008 |
| Publisher: | CSIR |
| Abstract: | Micrometer sized platelet-like particles of bismuth titanate (Bi₄Ti₃O₁₂) are prepared successfully by the calcination of a mixed-precursor in air. The mixed precursor is precipitated under microwave-hydrothermal (MH) treatment via dissolution-recrystallization kinetics. The mixed precursor is precipitated in-situ by giving MH treatment (at 200°C, 200 psi, and 30 min hold time) to the hydrolysed slurry containing Bi and Ti cations. The slurry was prepared by adding 20% aqueous KOH precipitant solution to a well-mixed stoichiometric nitrate solution containing Bi and Ti cations. XRD results revealed that the as-dried precursor consisted of a homogeneous mixture of non-crystalline particles of Bi₂O₃ and TiO₂. The calcination of the as-dried precursor at 700°C/2 h in air resulted in the formation of micron sized platelet like single-phase Bi₄Ti₃O₁₂ powders having orthorhombic structure. |
| Page(s): | 51-54 |
| ISSN: | 0971-4588 |
| Source: | IJEMS Vol.15(1) [February 2008]
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