OPTICAL PROPERTIES OF SILICON-NITRIDE-BASED CERAMICS WITH MOLYBDENUM AND ALUMINUM ADMIXTURES

被引：0
|
作者：
Prokopets, V. M. [1 ]
Shaykevich, I. A. [1 ]
机构：
[1] Taras Shevchenko Kyiv Natl Univ, Fac Phys, 6 Acad Glushkov Prosp, UA-03127 Kiev, Ukraine
来源：
UKRAINIAN JOURNAL OF PHYSICS | 2005年 / 50卷 / 01期
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中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The specimens of the Si3N4-based ceramics are investigated by X-ray diffractometry and spectroellipsometry. An influence of admixtures on the phase composition and optical properties of the ceramics has been studied. It has been found that the defects of the crystalline structure are responsible for the reduction of the band gap. It has been shown that, by analyzing the dispersion of the refractive index in the effective medium approximation, it is possible to estimate the amount of oxygen in the Si3N4-based ceramics.
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页码：57 / 61
页数：5
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