'Afyon Kocatepe Universitesi Iktisadi ve Idari Bilimler Fakultesi Dergisi'
Abstract
In this study, synthesis and characterization of high temperature Yb2O3–ZrO2 insulation coatings on Ag
substrate were investigated for magnet technologies. The produced powders and coatings were
characterized by using DTA-TG, FTIR, XRD, SEM-EDS, refractometer, spectrophotometer and
empendance machines. The DTA/TG result indicates three-stage decomposition for amorphous Yb2O3–
ZrO2 composites. FTIR studies revealed that heat treated powders indicate several absoption bands
corresponding to O-H, carboxyl and oxide groups. Though ZrO2 phase present in the structures with
high intensity, Yb3O2 phase possessess low intensity peak. A regular surface morphology generally
forms once Yb2O3 content increase in ZrO2 from 0 mole % to 12 mole %. The refractive indexes of
Yb2O3–ZrO2 coatings were found to be in the range of 1.3539 and 1.3655. The film thicknesses of all
coatings generally increased from 0.50 µm to 1.20 µm according to number of dipping. Optical band
gap values of Yb2O3–ZrO2 coatings are approximately 3,014 eV. Empedance values of ZrO2 and Yb2O3-
ZrO2 coatings were measured as 2.52 ohms and 2.51 ohms, respectively
