X-RAY-ABSORPTION STUDY ON NANOSTRUCTURED ZIRCONIA AND YTTRIA

被引：23

作者：

NITSCHE, R ^{[1
]}

WINTERER, M ^{[1
]}

CROFT, M ^{[1
]}

HAHN, H ^{[1
]}

机构：

[1] RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08855

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1995年 / 97卷 / 1-4期

关键词：

D O I：

10.1016/0168-583X(95)00201-4

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Nanostructured zirconia and yttria powders with grain sizes between 5 and 30 nm have been studied by extended X-ray absorption fine structure (Y and Zr K-edges). Due to the high specific surface area of the powders (75 to 120 m(2)/g) the fraction of surface atoms is drastically increased. The effective coordination number of the zirconium and yttrium atoms is reduced (up to 40%) in the powders. The decrease of the coordination number is most obvious in the cation-cation-distances. Fully dense ceramic samples with a grain size of 80 nm have nearly the same coordination number compared to samples with conventional grain sizes of about 1 mu m.

引用

页码：127 / 132

页数：6

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