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Fabricación de tubos de carburo de silicio para uso como cuerpo radiante en hornos y sistemas de calentamiento

Authors: López Gómez, María Esperanza; López, Daniel; Areiza Serna, Jaime Andrés; Monsalve Arias, Mónica Johanna;

Fabricación de tubos de carburo de silicio para uso como cuerpo radiante en hornos y sistemas de calentamiento

Abstract

RESUMEN: El carburo de silicio (SiC) es un material con alta potencialidad de uso en hornos y sistemas de calentamiento dada su alta conductividad térmica, refractariedad, baja expansión térmica y estabilidad mecánica a temperaturas hasta de 1650°C. A pesar de sus excelentes propiedades térmicas, la utilización del SiC en hornos y sistemas de calentamiento ha estado limitada por la oxidación que sufre a temperatura superior a 1100°C y por su falta de plasticidad y alta dureza, lo que dificulta su conformado a través de los procesos tradicionalmente utilizados para dar forma a los cerámicos. En la búsqueda de una solución al problema de conformado, se obtuvo una pasta constituida por partículas de carburo de silicio de dos tamaños diferentes (180 Bm y 7 Bm), en relación en peso 70/30, las cuales fueron aglomeradas con un una solución acuosa de 7,5 % en peso de plastificante tipo celulosa (B) de carácter orgánico desarrollado en laboratorio; utilizando 15 ml de solución por cada 100 gramos de SiC. Con esta pasta fueron fabricados mediante centrifugado, tubos de buenas propiedades físicas y térmicas para su uso en hornos radiantes y otros sistemas de calentamiento.

ABSTARCT: Silicon carbide is a useful material in furnaces and heating systems because its high thermal conductivity, refractory, dimensional and mechanical stability to high temperature until 1650°C. In spite of its excellent thermal properties, utilization of silicon carbide in furnaces and heating systems has been limited for two factors: its oxidation due to temperatures higher than 1100°C and its low plasticity, reasons for which it’s shaped can become difficult by the conventional process normally used for shape ceramic materials. In order to solve the shape problem a paste was made. This paste was prepared using two different size particles (180 Bm y 7 Bm) with a relation of 70/30 weight, respectively. The SiC particles were agglomerated by a watery solution of 7,5% weight of celullose Type B plasticizer developed at laboratory. 15 ml of watery solution for each 100 grams of SiC were used. The paste let us obtain silicon carbide tubes by centrifugal technique, which reached out good physical and thermal properties to be used in radiant furnaces and heating systems applications.

Country
Colombia
Keywords

Conductividad térmica, Carburo de silicio, Hornos, Radiación, Tubos radiantes, Transferencia de calor

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green