Luminescent glass-ceramics based on nanoparticles of Ba(x)RE(1-x)F(2+x) and Pb(x)RE(1-x)F(2+x) solid solutions into fluoroborateтезисы доклада

Дата последнего поиска статьи во внешних источниках: 28 марта 2018 г.

Работа с тезисами доклада

[1] Luminescent glass-ceramics based on nanoparticles of ba(x)re(1-x)f(2+x) and pb(x)re(1-x)f(2+x) solid solutions into fluoroborate / O. B. Petrova, T. S. Sevostjanova, A. V. Khomyakov, I. C. Avetissov // E-MRS 2017 Spring Meeting Strasbourg, France – May 22-26. — SYMPOSIUM R : Nanoparticles in dielectric matrix: from synthesis to device applications for photonics, electronics, and bio sensing. — Strasbourg, France, 2017. — P. R.P1.4–R.P1.4. An addition of fluorides to oxide glasses significantly changes lots of properties of oxyfluoride glasses, namely, to extend transmittance in IR region, to reduce glass synthesis temperature, to decrease refractive index. For glass-ceramic fabrication we used BaF2-BaO-B2O3 and PbF2-PbO-B2O3 glasses systems, doped 1 mol.% REF3 (RE=Nd, Eu, Er). The increase of BaF2 or PbF2 concentration decreased the energy of phonon in the glass matrix resulting in the changes of final spectral-luminescent properties of the glass. Depending on composition and heat treatment conditions we observed the formation different crystalline phases during controlled crystallization: a) phases without RE – Ba2B10O17, BaB2O4, α-PbF2, PbB2O4.; b) cubic phases of solid solutions of Ba(x)RE(1-x)F(2+x) or Pb(x)RE(1-x)F(2+x). The latters demonstrated fluorescent properties similar to those of the corresponding crystals. The Nd-doped glass-ceramics demonstrated shift of the band maximum of the 870 nm (4F3/2-4I11/2) transition towards shorter wavelengths both for the Ba-based and Pb-based materials. The Eu-doped glass-ceramics demonstrated a sharp decrease of the ratio of intensities of electron dipole 612 nm (5D0-7F2) and magnetic dipole 580 nm (5D0-7F1) transitions. In the case of Er-doped glass-ceramics we observed an efficient up-conversion with the high intensity of the green line 550 nm (4S3/2+2H11/2-4I15/2).

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