Microwave induced magnetic decrystallization

Stephen M. Copley, Ramesh Peelamedu, Dinesh Agrawal, Rustum Roy

Research output: Contribution to conferencePaperpeer-review

Abstract

A number of crystalline materials in powder form containing magnetic ions have been decrystallized by exposing them to a 2.45 GHz single mode, quasi-pure magnetic field. Irradiations were carried out by placing samples at the specific location in a microwave cavity tuned to the TE103 mode where the magnetic field is maximized and the electric field is minimized. After irradiation, the samples sintered but retained their shape (there was no evidence of macroscopic flow); however, XRD and Raman analysis indicated a complete loss of crystallinity. These observations raise several questions: How is electromagnetic energy absorbed in this process? How is it stored? How is decrystallization induced by the microwave magnetic field? This paper presents our current understanding of this remarkable phenomenon.

Original languageEnglish (US)
Number of pages1
StatePublished - Dec 1 2004
Event2004 AIChE Annual Meeting - Austin, TX, United States
Duration: Nov 7 2004Nov 12 2004

Other

Other2004 AIChE Annual Meeting
CountryUnited States
CityAustin, TX
Period11/7/0411/12/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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