Journal
MATERIALS RESEARCH INNOVATIONS
Volume 5, Issue 3-4, Pages 170-177Publisher
SPRINGER-VERLAG
DOI: 10.1007/s10019-002-8642-6
Keywords
microwaves; E-field; H-field; ZnO; WC
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Using a 2.45 GHz wave-guided cavity, in a single mode TE103 excitation, we were able to physically locate compacted 5 mm pellets of samples separately at the H (magnetic) node (where the E field is nearly zero), or the E (electric) node (where H field is nearly zero). A preliminary survey of a variety of metals, (Cu, Fe, Co..) ceramics (ZnO, etc.), and composites, (WC-Co, ZnO-Co) showed remarkable differences in their heating behaviors. The results establish conclusively that the magnetic field interaction contributes greatly to microwave heating of common materials in a manner, previously neglected in most theories of microwave heating, albeit still to be understood.
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