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Title

EFFECT OF MILLING TIME AND MICROWAVE SINTERING ON MICROHARDNESS AND ELECTRICAL PROPERTIES OF NANO AND MICRO STRUCTURED CORDIERITE

Writers

KIANI M. | EBADZADEH T.

Pages

 Start Page 1 | End Page 5

Abstract

 The purpose of this research is to investigate the mechanical and electrical properties of nano structured CORDIERITE. Nano grain size powders were synthesized through MECHANICAL ACTIVATION by high-energy ball milling of the starting powders containing 34.86 wt% Al2O3, 51.36 wt% SiO2, and 13.78 wt% MgO. Samples were prepared by conventional and MICROWAVE SINTERING at 1390°C. SEM observations illustrated the equiaxed nano-grains of CORDIERITE with an average grain size of 40 nm for samples sintered in microwave. With the increase of milling time, samples sintered at 1390°C in microwave furnace obtained higher micro-hardness and density than those sintered at temperature in conventional furnace. Sample milled for 30 h and sintered in microwave furnace at 1390oC obtained the maximum DIELECTRIC CONSTANT of 5.5±0.1.

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