Physico-chemical treatment of the thick films

We seek here to characterize different films distinguished by their composition, their sintering temperature or the absence of sulfur dioxide treatment. These films are characterized, on a crystallographic level and on a stmctural plan, by the X-ray spectrometry and the scanning electron microscope respectively. 

The film made with 40% of beta-alumina possesses the properties of wettability which allow the beta-alumina to form an amorphous matrix. Nevertheless, the structure shows cracks and cavities. 

in the film containing 60% of beta-alumina, the structure shows jointed grains. Furthermore, the beta-alumina particles are not necessarily wrapped up in the glass. As in the case of sintered material, these films react in the presence of CO2 and water vapor. This causes the apparition of inflorescences we can thus assume the formation of sodium carbonate. 

No fundamental change has been observed in the stmctnre when we modify the adhesion temperature of the glass. 

Diffractograms for different thermal treatments show that the nepheline formation is accompanied by an increase in the annealing temperature, at least for fdtns containing 40% of beta-alumina and a large quantity of glass. 

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