Barium Gallogermanate Glass Ceramics for Infrared Applications

材料科学技术（英文）, 2010, 26(6): 558-563.

^1, , ^2, , ^3, , ^4,

1.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Graduate School of Chinese Academy of Sciences,Beijing 100029,China

2.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Luoyang Institute of Electro-optical Equipment of AVIC,Luoyang 471009,China

3.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Graduate School of Chinese Academy of Sciences,Beijing 100029,China

4.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China

Barium Gallogermanate Glass Ceramics for Infrared Applications

Bin Tang ^1, , Yi Yang ^2, , Youyu Fan ^3, , Long Zhang ^4,

1.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Graduate School of Chinese Academy of Sciences,Beijing 100029,China

2.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Luoyang Institute of Electro-optical Equipment of AVIC,Luoyang 471009,China

3.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Graduate School of Chinese Academy of Sciences,Beijing 100029,China

4.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China

Keywords： Germanate glass

The germanate glass ceramics is a potential candidate material for infrared(IR)dome and window applications.The crystallization mechanism of 20BaO-10Ga2O3-70GeO2 glass was investigated by differential thermal analysis(DTA),scanning electron microscopy(SEM)and X-ray diffraction(XRD).Two different types of phase evolution were found in the early stage of crystallization:(1)the further growth of the microcrystal formed during the slow cooling of glass melt and(2)the glass-in-glass phase separation.The controlled crystallization was obtained by two-step heat treatment.The middle infrared(MIR)-transparent glass ceramics were obtained,with expected thermal and mechanical improvements.

参考文献

[1]	Shyam S. Bayya;Jasbinder S. Sanghera;Ishwar D. Aggarwal .Infrared Transparent Germanate Glass-Ceramics[J].Journal of the American Ceramic Society,2002(12):3114-3116.

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Barium Gallogermanate Glass Ceramics for Infrared Applications

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