Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9795960 | Materials Science and Engineering: A | 2005 | 7 Pages |
Abstract
Novel zeolite-carbon composites were fabricated by a combined process of calcination and carbonization at 600-850 °C in the N2 atmosphere followed by a hydrothermal treatment from industrial wastes of coal fly ash and sawdust mixtures in alkaline aqueous solutions. Adaptability of the resulting zeolite-carbon composites as high value-added environmental materials was evaluated. It was found that the composites consisted of micropores and mesopores with the ability to adsorb water vapor up to an amount of 20 mass% which was superior to some commercial zeolite building materials. The composites also demonstrated a capacity to absorb electromagnetic wave in the W-band frequency range (75-110 GHz) characterized as a reflection loss higher than 20 dB at the resonant frequencies. These results indicated that the zeolite-carbon composites were prominent candidates as environmental-friendly building materials for wall or flooring with adsorption abilities for water vapor as well as absorption and shielding effects of electromagnetic wave.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
N.F. Gao, S. Kume, K. Watari,