ランタナイドテルライトナノ結晶からなる表面及びバルク透明結晶化ガラス

概要

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Crystallization behavior of BaO-Ln_2O_3-TeO_2 glasses (Ln = La, Pr, Sm, Eu, Er) was examined to prepare transparent crystallized glasses consisting of lanthanide tellurite crystals (Te^<4+> crystalline compounds) with low phonon energies. Transparent crystallized glasses with fluorite-type Ln_2Te_6O_15 or Ln_2Te_5O_<13> nanocrystals (〜50 nm sizes) were successfully prepared for the first time. The crystallization mechanism depends strongly on the lanthanide species: surface crystallization (〜15 μm) is dominant in La^<3+> and Pr^<3+> containing glasses, but homogeneous nucleation occurs easily in Sm^<3+>, Eu^<3+> and Er^<3+> containing glasses, giving transparent bulk crystallized glasses. These transparent nano-crystallized glasses are applicable to fabrication of optical amplified waveguides or Bragg grating fibers.
社団法人日本セラミックス協会の論文
2001-05-01