Precipitates in thermochemically reduced nickel-doped sapphire

被引：5

作者：

Ballesteros, C

Chen, Y

Chen, Y

Gonzalez, R

Kokta, MR

Zong, XF

机构：

[1] FUDAN UNIV,DEPT MAT SCI & ENGN,SHANGHAI 200433,PEOPLES R CHINA

[2] OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831

[3] UNION CARBIDE CORP,WASHOUGAL,WA 98671

[4] DEPT ENERGY,DIV MAT SCI,DAMASCUS,MD 20872

来源：

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1997年 / 76卷 / 02期

关键词：

D O I：

10.1080/01418619708209980

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nickel-doped Al2O3 (sapphire) crystals have been studied using optical absorption and transmission electron microscopy. After reduction at elevated temperatures in a hydrogen atmosphere, these crystals exhibit a dark colouration. Our results indicate that the colouration is due to Mie scattering from precipitates resulting from the reduction process. Analytical transmission electron microscopy techniques revealed the presence of metallic precipitates and identified them as Al3Ni. The precipitate distribution is very inhomogeneous.

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页码：357 / 365

页数：9

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