Modelling Evaporation And Chemical Reaction In A Multi-Component Droplet From Spray Pyrolysis Synthesis Of Mixed Metal-Oxide Nanocomposite Films

Keywords

Chemical reaction; Chemical spray pyrolysis; Evaporation; Mathematical modelling; Mixed metal-oxide film; Multi-component droplet; Nanocomposite sensor film

Abstract

This paper describes the mathematical modelling of transport and chemical reaction phenomena in a single droplet deposited on a heated substrate by spray pyrolysis. The droplet contains mixed salt solutions of tin chloride (SnCl4) and indium nitrate (In(NO3)3) which react on the substrate to produce mixed oxides (In2O3-SnO2) and water residue. The water residue is subsequently evaporated, leaving a thin film of the mixed oxides. The droplet, containing solvent and precursors is modelled using computational fluid dynamics technique. The various stages of droplet morphology associated with surface energy and evaporation are predicted. The transient distribution is also predicted of the concentration of the various species in the droplet. The results show that homogeneous chemical reaction occurs within 60% of the radial distance from the centre. This in turn results in the deposition of metal oxide within that region while a significant amount of unused reactants remains thereafter.

Publication Date

1-1-2015

Publication Title

International Journal of Mathematical Modelling and Numerical Optimisation

Volume

6

Issue

2

Number of Pages

141-158

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1504/IJMMNO.2015.069967

Socpus ID

84944673323 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84944673323

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