TY - JOUR
T1 - Colloidal synthesis of BaF 2 nanoparticles and their application as fillers in polymer nanocomposites
AU - Sathyamurthy, Srivatsan
AU - Tuncer, Enis
AU - More, Karren L.
AU - Gu, Baohua
AU - Sauers, Isidor
AU - Paranthaman, M. Parans
PY - 2012/3
Y1 - 2012/3
N2 - Nanoparticles of pure and Eu-doped BaF 2 have been prepared through sol-gel colloidal synthesis. In addition, BaF 2-filled PMMA polymer nanocomposites were fabricated and dielectric properties were measured. The as-synthesized pure and Eu-doped BaF 2 nanoparticles were analyzed by both X-ray diffraction and transmission electron microscopy and consisted of crystalline BaF 2 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 Eu 3+ ( 5D 0→ 7F J (J=1-4) transitions). We also measured significantly enhanced dielectric breakdown strength of up to 30% for BaF 2 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.
AB - Nanoparticles of pure and Eu-doped BaF 2 have been prepared through sol-gel colloidal synthesis. In addition, BaF 2-filled PMMA polymer nanocomposites were fabricated and dielectric properties were measured. The as-synthesized pure and Eu-doped BaF 2 nanoparticles were analyzed by both X-ray diffraction and transmission electron microscopy and consisted of crystalline BaF 2 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 Eu 3+ ( 5D 0→ 7F J (J=1-4) transitions). We also measured significantly enhanced dielectric breakdown strength of up to 30% for BaF 2 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.
UR - http://www.scopus.com/inward/record.url?scp=84858793832&partnerID=8YFLogxK
U2 - 10.1007/s00339-011-6652-1
DO - 10.1007/s00339-011-6652-1
M3 - Article
AN - SCOPUS:84858793832
SN - 0947-8396
VL - 106
SP - 661
EP - 667
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 3
ER -