Influence of vapor transport equilibration on the crystal quality and thermal-expansion coefficients of gamma-LiAlO2


Autoria(s): 邹军; 周圣明; 徐军; Zhang LH; Xie ZL; Han P; Zhang R
Data(s)

2005

Resumo

gamma-LiAlO2 (LAO) single crystal has been grown by the Czochralski method. However, its quality was deteriorated due to lithium volatilization during the crystal growth. The full width at half maximum value drops from 116.9 to 44.2 arc sec after the LAO slice was treated by vapor transport equilibration at 1000, 1100, and 1200 degrees C/48 h in sequence. The treated slice shows higher optical transmission than the as-grown one in the measured wavelength range of 190-1900 nm, meanwhile, its absorption edge exhibits a blueshift. According to Raman spectra, the treated slice has homogeneous quality at different depths from surface to 0.01 mm. The expansion coefficient of the treated slice for a axis drops from 17.2398x10(-6)/degrees C to 16.5240x10(-6)/degrees C, and that for c axis drops from 10.7664x10(-6)/degrees C to 10.0786x10(-6)/degrees C.

Identificador

http://ir.siom.ac.cn/handle/181231/5747

http://www.irgrid.ac.cn/handle/1471x/12347

Idioma(s)

英语

Fonte

邹军;周圣明;徐军;Zhang LH;Xie ZL;Han P;Zhang R.,J. Appl. Phys.,2005,98(8):84909-

Palavras-Chave #光学材料;晶体 #SINGLE-CRYSTAL #GROWTH #EPITAXY #LIALO2
Tipo

期刊论文