Effect of Adiabatic Flame Temperature on Nano Alumina Powders during Solution Combustion Process

Sherikar, Baburao N and Umarji, AM (2011) Effect of Adiabatic Flame Temperature on Nano Alumina Powders during Solution Combustion Process. In: Transactions - Indian Ceramic Society, 70 (3). pp. 167-172.

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Abstract

Nano ceramic alumina powders are synthesized by solution combustion synthesis using aluminium nitrate as oxidizer and urea as fuel with different fuel to oxidizer ratio. The variation of adiabatic flame temperatures are calculated theoretically for different fuel/oxidizer ratio according to thermodynamic concept and correlated with the observed flame (reaction) temperatures. A ``multi channel thermocouple setup connected to computer interfaced Keithley multi meter 2700'' is used to monitor the thermal events occurring during the process. The combustion products, characterized by XRD, show that the powders are composed of polycrystalline oxides with crystallite size of 32 to 52 nm. An interpretation based on maximum combustion temperature and the amount of gases produced during reaction for various fuel to oxide ratio has been proposed for the nature of combustion and its correlation with the characteristics of as-synthesized powder.

Item Type:	Journal Article
Publication:	Transactions - Indian Ceramic Society
Publisher:	Indian Ceramic Society
Additional Information:	Copyright of this article belongs to Indian Ceramic Society.
Keywords:	Alumina;Adiabatic flame temperature;Combustion;Fuel to oxidizer ratio;Time-temperature history;Multi channel thermocouple setup
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	13 Jan 2012 10:04
Last Modified:	22 Feb 2012 10:30
URI:	http://eprints.iisc.ac.in/id/eprint/43129

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