Browsing by Subject "BAZRXTI1-XO3"

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    Structural investigation of barium zirconium titanate Ba(Zr0.5Ti0.5)O3 particles synthesized by high energy ball milling process
    (INDIAN ACAD SCIENCES) Aktas, PS
    In this study, pure barium zirconium titanate Ba(Zr0.5Ti0.5)O-3 (BZT) powders were successfully synthesized via the mechanochemical route using barium carbonate and titanium oxide as precursors. Structural properties of BZT are characterized by X-ray diffraction (XRD), Rietveld refinement, scanning electron microscope, energy dispersive X-ray spectrometry, thermogravimetric analysis, and FT-IR spectroscopy. It was observed that the ball milling operation has a significant influence on sintering temperature. Single-phase BZT was obtained under sintering conditions at 1350 degrees C. XRD and Rietveld refinement studies revealed that BZT composition has a cubic structure with a space group of Pm-3m(#221). As estimated by the Scherrer formula, the average crystallite size was determined as 79.2 nm for sintering temperature at 1350 degrees C.
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    Structural and morphological investigations of barium zirconium titanate particles synthesized by the Pechini method
    (WALTER DE GRUYTER GMBH) Aktas, PS
    Barium zirconium titanate systems are lead-free, environmentally friendly materials exhibiting relaxor behavior with increasing Zr content. Therefore, the study proposed preparing and characterization of an ecologically favorable Pb-free relaxor from Ba(Zr0.5Ti0.5)O-3 (BZT). The results reported here are based on the research of BZT micrometric powders prepared by the Pechini method. The phase evolution was monitored by X-ray diffraction from 800 degrees C to 1300 degrees C, and results show that the formation of BZT starts around 1050 degrees C and continues until 1300 degrees C. The Rietveld refinement of data at 1300 degrees C confirms that BZT has a cubic structure. The thermal and structural properties of BZT samples were identified by thermogravimetric analysis and Fourier-transform infrared spectroscopy. Scanning electron microscopy results reveal that the synthesized particles are micron-sized (2-2.8 mu m), rounded, polygonal-shaped, and agglomerated.