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Colloidal synthesis of BaF2 nanoparticles and their application as fillers in polymer nanocomposites

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Abstract

Nanoparticles of pure and Eu-doped BaF2 have been prepared through sol-gel colloidal synthesis. In addition, BaF2-filled PMMA polymer nanocomposites were fabricated and dielectric properties were measured. The as-synthesized pure and Eu-doped BaF2 nanoparticles were analyzed by both X-ray diffraction and transmission electron microscopy and consisted of crystalline BaF2 particles with an average diameter of 13.6 nm with a standard deviation of about ±2.4 nm. The photoluminescence properties of the pure and Eu-doped (2%, 4% and 8%) nanoparticles showed characteristic emission of Eu3+ (5D0→7F J (J=1–4) transitions). We also measured significantly enhanced dielectric breakdown strength of up to 30% for BaF2 nanocomposites over the unfilled PMMA polymer. This study thus offers some promise of sol-gel synthesis of nanocomposite dielectrics with great potential for use as electrical insulation materials in cryogenic high-voltage applications.

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Author notes

  1. Srivatsan Sathyamurthy

    Present address: American Superconductor Corporation, Devens, MA, 01434, USA

  2. Enis Tuncer

    Present address: Dielectrics and Electrophysics, GE Global Research, Niskayuna, NY, 12309, USA

Authors and Affiliations

  1. Chemical Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    Srivatsan Sathyamurthy & M. Parans Paranthaman

  2. Fusion Energy Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    Enis Tuncer & Isidor Sauers

  3. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    Karren L. More

  4. Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    Baohua Gu

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  1. Srivatsan Sathyamurthy
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Correspondence to Enis Tuncer.

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Sathyamurthy, S., Tuncer, E., More, K.L. et al. Colloidal synthesis of BaF2 nanoparticles and their application as fillers in polymer nanocomposites. Appl. Phys. A 106, 661–667 (2012). https://doi.org/10.1007/s00339-011-6652-1

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  • DOI: https://doi.org/10.1007/s00339-011-6652-1

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