I am working on calcination temprature & time to producing amorphous alumina nano particles?
If you want to synthesize amorphous alumina, you will need to calcine your sample at lower temperature, i.e. 200-300 C.
Temperature in the range of 200 - 260 will solve your problem.
Below 300 C and time 16 hrs. maintained then you will obtained your materials.
It is important to consider which precursor will be used for preparation of aluminum oxide.
Some suggestions to read about synthesis of high surface area alumina:
1) An efficient route to aqueous phase synthesis of nanocrystalline Al2O3 ... http://oatao.univ-toulouse.fr/9100/1/Bleta_9100.pdf
2) Specific surface area and structures of aluminas ...
http://www.scielo.br/scielo.php?pid=S1517-70762008000200011&script=sci_arttext
3) Structure, Surface Area and Morphology of Aluminas from
thermal decomposition ....
http://www.scielo.br/scielo.php?pid=S0001-37652000000400003&script=sci_arttext
Hi
Please find the attached paper on the preparation of 2.9 nm of eta alumina and the effect of the precursor and calination temperature on the alumina phase produced
Regards
Ahmed
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