锌
刚玉
尖晶石
铝酸盐
纤锌矿晶体结构
材料科学
紫外线
晶体结构
Crystal(编程语言)
矿物学
分析化学(期刊)
无机化学
结晶学
化学
冶金
光电子学
程序设计语言
水泥
色谱法
计算机科学
作者
Suresh K. Sampath,J. F. Cordaro
标识
DOI:10.1111/j.1151-2916.1998.tb02385.x
摘要
The optical spectra of zinc aluminate (ZnAl 2 O 4 ), zinc gallate (ZnGa 2 O 4 ), and zinc aluminogallate (ZnAlGaO 4 ) spinel powders were studied at wavelengths in the range of 250‐900 nm using reflectance spectroscopy. The ZnAl 2 O 4 and ZnGa 2 O 4 powders were synthesized by using conventional ceramic processing techniques and had systematic variations in the molar ratio of ZnO to M 2 O 3 (M = Al or Ga). The cubic spinel crystal structure of each composition was confirmed via powder X‐ray diffractometry. The ZnAl 2 O 4 powders showed optical properties in the ultraviolet wavelength region and had combined characteristics that were similar to that of ZnO (wurtzite structure) and Al 2 O 3 (corundum structure), which result from the similar local environments of the zinc and aluminum cations within the cubic spinel crystal structure. A mechanically induced optical absorption (optomechanical effect) in the ultraviolet wavelength region was also observed in ZnAl 2 O 4 . The ZnGa 2 O 4 powder followed a similar behavior, with the exception that the optomechanical effect did not occur in the gallate. The ZnAlGaO 4 showed optical spectra that were intermediate to that of the endpoint compositions.
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