Comportamiento hidrodinámico de un reactor electroquímico para recuperar residuos en la fabricación de películas semiconductoras

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Autores

Luis Adrián Echeverri Holguin
Henry Reyes Pineda

Abstract

En el laboratorio de optoelectrónica adscrito a la Universidad del Quindío se encuentra implementada la técnica Epitaxia en fase líquida, utilizada para elaborar películas semiconductoras de GaInAsSb, la cual genera, en promedio, un desecho de 1457 mg, constituido, en mayor proporción, por galio, indio y antimonio, que pueden ser recuperados por procesos electroquímicos. El propósito de este estudio fue reciclar y cristalizar estos metales puros a bajo costo, con cero productos de desechos metálicos en la fabricación de películas semiconductoras. Los estudios se llevaron a cabo en un reactor electroquímico de compartimentos separados, inyectando una solución trazadora de NaCl en el compartimento catódico, determinándose la conductividad a la entrada y a la salida del reactor, y describiendo con ello un modelo matemático del comportamiento hidrodinámico, mediante la distribución de tiempos de residencia (DTR), y así aplicarlo para la recuperación de estos metales, operando el equipo a intensidad constante (modo galvanostático) y a potencial constante (modo potenciostático).

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