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Synthesis of SmAlO3 nanocrystalline powders by polymeric precursor method

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Abstract

SmAlO3 nanocrystalline powders were successfully synthesized by the polymeric precursor method using ethylenediaminetetraacetic acid as a chelating agent. The precursor and the derived powders were characterized by thermogravimetry analysis (TG) and differential scanning calorimetry analysis (DSC), infrared spectroscopy (IR), X-ray diffractometry (XRD) and transmission electron microscopy (TEM). The results showed that pure SmAlO3 powder with orthorhombic perovskite structure could be synthesized at 800°C for 2 h without formation of any intermediate phase. The average particle size of the powder synthesized at 900°C was as low as 28 nm. Subsequently, the bulk SmAlO3 ceramics were prepared at various sintering temperatures using the synthesized powders calcined at 900°C for 2 h as starting materials. The sintering experiments indicated that the sample sintered at 1550°C for 2 h exhibited the highest relative density of 97.2% and possessed the best microwave dielectric properties of ε r=20.94, Q×f=78600 GHz and τ f=−71.8 ppm/°C.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing, 210009, P.R. China

    Jiamao Li & Tai Qiu

  2. School of Materials Science and Engineering, Anhui University of Technology, Maanshan, 243002, P.R. China

    Jiamao Li

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  1. Jiamao Li
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  2. Tai Qiu
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Correspondence to Jiamao Li.

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Li, J., Qiu, T. Synthesis of SmAlO3 nanocrystalline powders by polymeric precursor method. Appl. Phys. A 104, 465–469 (2011). https://doi.org/10.1007/s00339-011-6263-x

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  • DOI: https://doi.org/10.1007/s00339-011-6263-x

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