Crystallization of nano calcium fluoride in CaF2-Al2O3-SiO2 system

被引：30

作者：

Imanieh, Mohammad Hassan ^{[1
,2
]}

Yekta, Bijan Eftekhari ^{[1
]}

Marghussian, V. ^{[1
]}

Shakhesi, Saeed ^{[2
]}

Martin, I. R. ^{[3
]}

机构：

[1] Iran Univ Sci & Technol, Dept Mat, Div Ceram, Tehran, Iran

[2] Engn Res Inst Tehran, Nanotechnol Dept, Tehran, Iran

[3] Univ La Laguna, Dept Fis Fundamental Elect & Sistemas, E-38206 Tenerife, Spain

来源：

SOLID STATE SCIENCES | 2013年 / 17卷

关键词：

Oxyfluoride glass ceramic; Glass ceramic; CaF2; nanocrystals; Oxyfluoride; TRANSPARENT GLASS-CERAMICS; UP-CONVERSION EMISSION; SPECTROSCOPIC PROPERTIES; SILICATE-GLASSES; CAF2; LUMINESCENCE; ER3+; IONS; NANOCRYSTALS;

D O I：

10.1016/j.solidstatesciences.2012.11.008

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The effects of alumina and CaF2 content on the crystallization behavior, fluorine loss, phase separation mechanism and optical properties of oxyfluoride glass ceramics were investigated. Three series of glasses in which their SiO2/Al2O3 ratio was different such as 1.8, 2.18 and 2.5 were examined. Results showed that the adopted ratios played key role significantly in the mechanism of phase separation of the glass. It modified from spinodal decomposition to nucleation and growth by decreasing the mentioned ratio. UV spectroscopy showed that owing to the small size of precipitated CaF2 crystals, i.e. 20 nm, in the glass with a silicon oxide to alumina ratio of 2.18 and initial CaF2 amount of 35 mol%, it remained transparent after heat treatment at 740 degrees C. (C) 2012 Elsevier Masson SAS. All rights reserved.

引用

页码：76 / 82

页数：7

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