摘要
从不同的氧化铝水合物加热脱水制备的γ和η型氧化铝,广泛用作催化剂和催化剂载体。它们具有不同的物化性质,其微观结构已进行了很多研究。γ-和η-Al_2O_3的x射线衍射有两个特征:一是其整个衍射图非常类似于尖晶石类结构的衍射图;二是各衍射线具不同的宽化特征:即所有衍射线可分成宽散线和较尖锐线两大组。根据前者,γ-和η-Al_2O_3被认为是具有畸变尖晶石结构,由于η-Al_2O_3的(400)和(440)单线在γ-Al_2O_3中变为双线。
The relation between the broadening of X-ray diffraction peaks and their structure factor, for γ-and η-Aluminas, was studied. Comparison showed that the structure factor of the broad peaks result primarily from the Aluminium atoms. Thus,The structue imperfection of γ-and η-Aluminas is interpreted in terms of incompleterearrangment of Aluminium atoms.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1992年第3期429-431,共3页
Acta Physico-Chimica Sinica
关键词
活性氧化铝
衍射线宽化
结构缺陷
Structure of activated aluminas
Broadening of diffraction lines
