Paßlick C, Johnson J A, Schweizer S
Centre for Innovation Competence SiLi-nano , Martin Luther University of Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Str. 3, 06120 Halle (Saale), Germany.
J Non Cryst Solids. 2013 Jul 1;371-372:33-36. doi: 10.1016/j.jnoncrysol.2013.03.042.
This work focuses on the structural changes of barium chloride (BaCl) nanoparticles in fluorochlorozirconate-based glass ceramics when doped with two different luminescent activators, in this case rare-earth (RE) ions, and thermally processed using a differential scanning calorimeter. In a first step, only europium in its divalent and trivalent oxidation states, Eu and Eu, is investigated, which shows no significant influence on the crystallization of hexagonal phase BaCl. However, higher amounts of Eu increase the activation energy of the phase transition to an orthorhombic crystal structure. In a second step, nucleation and nanocrystal growth are influenced by changing the structural environment of the glasses by co-doping with Eu and trivalent Gd, Nd, Yb, or Tb, due to the different atomic radii and electro-negativity of the co-dopants.
这项工作聚焦于当掺杂两种不同的发光激活剂（在这种情况下为稀土（RE）离子）时，氟氯锆酸盐基微晶玻璃中氯化钡（BaCl）纳米颗粒的结构变化，并使用差示扫描量热仪进行热处理。第一步，仅研究二价和三价氧化态的铕（Eu²⁺和Eu³⁺），结果表明其对六方相BaCl的结晶没有显著影响。然而，较高含量的Eu²⁺会增加向正交晶系晶体结构转变的活化能。第二步，由于共掺杂剂的原子半径和电负性不同，通过与Eu³⁺和三价的Gd、Nd、Yb或Tb共掺杂来改变玻璃的结构环境，从而影响成核和纳米晶体生长。
