STUDY ON SYNTHESIS AND EVOLUTION OF NANOCRYSTALLINEMg4Ta2O9BY AQUEOUS SOL–GEL PROCESS

H. T. Wu (), C. H. Yang, W. B. Wu and Y. L. Yue
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H. T. Wu: School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
C. H. Yang: School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
W. B. Wu: School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
Y. L. Yue: School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China

Surface Review and Letters (SRL), 2012, vol. 19, issue 03, 1-6

Abstract: Nanosized and highly reactiveMg4Ta2O9were successfully synthesized by aqueous sol–gel method compared with conventional solid-state method. Ta-Mg-citric acid solution was first formed and then evaporated resulting in a dry gel for calcination in the temperature ranging from 600°C to 800°C for crystallization in oxygen atmosphere. The crystallization process from the gel to crystallineMg4Ta2O9was identified by thermal analysis and phase evolution of powders was studied using X-ray diffraction (XRD) technique during calcinations. Particle size and morphology were examined by transmission electron microscopy (TEM) and high resolution scanning electron microscopy (HR-SEM). The results revealed that sol–gel process showed great advantages over conventional solid-state method andMg4Ta2O9nanopowders with the size of 20–30 nm were obtained at 800°C.

Keywords: Mg4Ta2O9nanopowder; powder synthesis; sol–gel process; solid-state method (search for similar items in EconPapers)
Date: 2012
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DOI: 10.1142/S0218625X12500242

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