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Decrystallizing Solid Crystalline Titania, Without Melting, Using Microwave Magnetic Fields

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TiO2—a prototype ceramic—was decrystallized in a 2.45 GHz AC magnetic field in a single mode TE103 applicator. The titania powders were synthesized by a sol–gel process and pressed into circular pellets. The pellets were very slightly reduced at 1273 K in a reducing atmosphere. The reduced pellets were introduced into the single mode microwave cavity and placed at the magnetic field maximum node and exposed for 10–30 s in a forming gas atmosphere. The reacted samples were then characterized by XRD, SEM, Raman, and TEM. The data presented in this note demonstrate that a very short treatment in the AC magnetic field at 2.45 GHz can transform rutile structure oxides to a noncrystalline state.

Document Type: Research Article


Affiliations: Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802

Publication date: June 1, 2005


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