Phase and microstructure evolution in precursor plasma-sprayed YIG coatings
2005; Elsevier BV; Volume: 32; Issue: 1 Linguagem: Inglês
10.1016/j.ceramint.2005.02.001
ISSN1873-3956
AutoresXinpeng Guo, B.G. Ravi, Q.Y. Yan, R. J. Gambino, Sanjay Sampath, J. Margolies, John B. Parise,
Tópico(s)Magnetic Properties and Synthesis of Ferrites
ResumoYttrium iron garnet (YIG) coatings were prepared using a liquid precursor plasma spray (PPS) method. Regular and reverse co-precipitated feedstock sols were directly sprayed through a radio frequency (RF) plasma torch. X-ray diffraction (XRD) analyses revealed the formation of amorphous coating in the as-sprayed condition. Post-annealing treatments resulted into nanostructured garnet coatings and the crystallinity of the coatings increased as a function of increasing annealing temperature. Coating annealed at 1000 °C/h exhibited a saturation magnetization of 65 emu/cc and a coercivity of 37 Oe. PPS approach feeds on molecularly mixed precursor liquids or sols, obviating the need for pre-mixed powders and thus opening up new avenues for developing nanostructured magnetic oxide coatings.
Referência(s)