Síntesis de una matriz cuasiceramica destinada a la obtención de fundentes aglomerados para proceso SAW y evaluación cinético-termodinámica de su proceso de humectación

AUTOR(ES)

Quintana-Puchol, Rafael, Prieto-Garcia, Omar, Hernández-Ruiz, Jesús E., Cruz-Crespo, Amado, Gómez-Pérez, Carlos R., Perdomo-González, Lorenzo

FONTE

Soldagem & Inspeção

DATA DE PUBLICAÇÃO

2010-06

RESUMO

In the this paper is presented a conception of the synthesis by sinterización at relative low temperature, of an amorphous cuasiceramic matrix to be used in agglomerated flux in the SAW process. In the design of the cuasiceramic it was made a valuation of the chemical composition of the diferent mineral concentrates (feldspar, zeolite and calcite), as well as of the relationship SiO2/Al2O3 of the alumosilicates. Also, as strategic tools for synthesis were used the phase diagram SiO2-Al2O3-CaO, the basicity and chemical activity indexes and the Temman temperature. It was selected the more appropriate synthesis variant by a valuation of the DRX spectrum of the matrix and a new approach (criterion) on the sinterization grade. Kinetic and thermodynamic valuations of the isothermic absorption process of the humidity (moisture) by the matrix grains are also made. The Langmuir isotherm model was adjusted acceptably to describe the humidity adsorption process by matrix grains. The determination of the values of Langmuir isotherm constants to different relative humidities and temperatures allowed to calculate the values of entalpía, entropy and Gibbs free energy of the adsorption process.

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