| Phase Evolution and Stability of Aluminium Titanate
Prepared by Solid-State Route: Effect of Two
Different Particle Size of Al2O3 |
V. Singh, G. Jayarao and R. Mazumder
pages : 170-174
DOI : 10.1080/0371750X.2016.1193446 |
| Abstract |
| Al2TiO5 (AT) powder was prepared by solid-state method using Al2O3 and TiO2
precursor powders. Effect of two different types of Al2O3 precursor powder (namely,
Al2O3-M and Al2O3-N with average particle size of 4.2 m and 75 nm, respectively)
on phase evolution and stability was studied. In the case of large particle Al2O3
precursor powder, AT phase was formed at 1500oC with a yield of 97%. Whereas,
using nano-Al2O3 precursor powder, AT phase was formed at 1350oC with a yield
of 91% and almost phase pure powder can be prepared at 1500oC. The stability of
the AT pellet (sintered at 1500oC) was investigated by keeping the powder at
1150oC/6 h. It was observed from the XRD analysis that only 40% AT phase was
retained in samples prepared with micron-size Al2O3. But in the case of the sample
prepared using nano-size Al2O3, 93% AT phase was retained.
[Keywords: Al2TiO5, Nano-Al2O3, Solid-state method] |
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