Anion diffusivity in highly conductive nanocrystalline BaF2:CaF2 composites prepared by high-energy ball milling

被引：72

作者：

Ruprecht, Benjamin ^{[1
]}

Wilkening, Martin ^{[1
,2
]}

Steuernagel, Stefan ^{[3
]}

Heitjans, Paul ^{[1
,2
]}

机构：

[1] Leibniz Univ Hannover, Inst Phys Chem & Elektrochem, D-30167 Hannover, Germany

[2] Leibniz Univ Hannover, Ctr Solid State Chem & New Mat, D-30167 Hannover, Germany

[3] Bruker Biospin GmbH, D-76287 Rheinstetten, Germany

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2008年 / 18卷 / 44期

关键词：

D O I：

10.1039/b811453f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on the fluorine diffusivity in nanocrystalline BaF(2) and CaF(2) as well as in BaF(2):CaF(2) composites prepared by high-energy ball milling. Mechanical treatment of polycrystalline BaF(2) together with CaF(2) results in a nanocrystalline composite with an unexpectedly high dc conductivity of about 0.1 mS cm(-1) at 450 K. X-ray diffraction and (19)F magic angle spinning NMR measurements at extraordinary high spinning speeds reveal that this can be explained inter alia by the interplay of structural disorder and the formation of a mixed (Ba,Ca)F(2) phase.

引用

页码：5412 / 5416

页数：5

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