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

共 24 条

[1] Pathways for ion transport in nanostructured BaF2:CaF2
Adams, S.
Tan, E. S.
[J]. SOLID STATE IONICS, 2008, 179 (1-6) : 33 - 37
[2] INTERSTITIAL CONDUCTION IN BAF2 CRYSTALS
BARSIS, E
TAYLOR, A
[J]. JOURNAL OF CHEMICAL PHYSICS, 1968, 48 (10) : 4362 - &
[3] Correlation between 19F environment and isotropic chemical shift in barium and calcium fluoroaluminates
Body, M
Silly, G
Legein, C
Buzaré, JY
[J]. INORGANIC CHEMISTRY, 2004, 43 (08) : 2474 - 2485
[4] CONCENTRATION AND MOBILITY OF INTERSTITIAL FLUORINE IONS IN CAF2
BOLLMANN, W
REIMANN, R
[J]. PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1973, 16 (01): : 187 - 196
[5] IONIC CONDUCTIVITY OF PURE AND DOPED BAF2 CRYSTALS
BOLLMANN, W
[J]. PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1973, 18 (01): : 313 - 321
[6] Structure and dynamics in nanoionic materials
Chadwick, Alan V.
Savin, Shelley L. P.
[J]. SOLID STATE IONICS, 2006, 177 (35-36) : 3001 - 3008
[7] ENHANCEMENT OF IONIC-CONDUCTION IN CAF2 AND BAF2 BY DISPERSION OF AL2O3
FUJITSU, S
MIYAYAMA, M
KOUMOTO, K
YANAGIDA, H
KANAZAWA, T
[J]. JOURNAL OF MATERIALS SCIENCE, 1985, 20 (06) : 2103 - 2109
[8] Defect chemical modeling of mesoscopic ion conduction in nanosized CaF2/BaF2 multilayer heterostructures
Guo, Xiangxin
Matei, Ion
Jamnik, Janez
Lee, Jong-Sook
Maier, Joachim
[J]. PHYSICAL REVIEW B, 2007, 76 (12)
[9] Effects of orientation and substrate on ion transport in fluoride heterostructures grown by molecular beam epitaxy
Guo, XX
Sata, N
Maier, J
[J]. ELECTROCHIMICA ACTA, 2004, 49 (07) : 1091 - 1096
[10] Fast diffusion in nanocrystalline ceramics prepared by ball milling
Heitjans, P
Indris, S
[J]. JOURNAL OF MATERIALS SCIENCE, 2004, 39 (16-17) : 5091 - 5096

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