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Preparation of acicular particles of α-alumina

Published online by Cambridge University Press:  03 March 2011

Takeo Iga  and
Yoshio Murase
Takeo Iga
Affiliation:
Ceramic Science Department, National Industrial Research Institute of Nagoya, Nagoya 462 Japan
Yoshio Murase
Affiliation:
Ceramic Science Department, National Industrial Research Institute of Nagoya, Nagoya 462 Japan
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Abstract

Aluminum ammonium sulfate (AA) solution (0.1 mol/l) and ammonium hydrogen carbonate (AHC) solution (1.2 mol/l) were allowed to react at room temperature. The precipitates formed were kept with the mother liquor in a closed vessel and aged at 100 °C. Acicular-shaped crystalline particles of Al(NH4)CO3(OH)2, (AACH), were obtained after the elongated aging period. Acicular α-alumina particles were obtained through the thermal decomposition at 1300 °C out of the AACH particles which were previously treated with a small amount of tetraethoxysilane (about 1.6 wt. % of SiO2).

Type
Rapid Communication
Information
Journal of Materials Research , Volume 10 , Issue 7 , July 1995 , pp. 1579 - 1581
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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