High performance infrared heaters using carbon fiber filaments decorated with alumina layer by microwave-assisted method

Chien Te Hsieh*, Dong Ying Tzou, Ze Shien Huang, Chi Yuan Lee, Jeng-Kuei Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

This study adopts an efficient microwave-assisted (MA) route to deposit Al2O3 layer onto microscaled carbon fabrics (CFs) as a filament for infrared (IR) heater. The MA deposition is able to coat different densities of alumina on the surface of CFs by adjusting ionic concentration of Al3+. The highly-crystalline Al2O3 layers can be formed under microwave irradiation of 720 W. It has shown that both the heating rate and maximal temperature are increasing functions of the surface density of alumina. This improved thermal efficiency originates from the decoration of Al2O3 onto the CFs, liberating the IR-light illumination with different wavelengths and increasing the emissive surface area of CF filaments. Under the operating condition at 25 V, the heating rate and the maximal temperature of composite filaments can reach 36.6° C/min and 213° C, respectively. The composite heater displays the highest irradiation power of 49.2 W, approximately 2.6 times higher as compared to the original CF heater. This satisfactory result expresses that a robust design that combines with CF heaters and decoration of alumina deposits exhibits a potential feasibility for commercializing IR illuminators with high thermal irradiation performance.

Original languageEnglish
Pages (from-to)521-525
Number of pages5
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume59
DOIs
StatePublished - 1 Feb 2016

Keywords

  • Alumina
  • Carbon fibers
  • Infrared heating
  • Microwave deposition
  • Thermal radiation

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