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β-氧化鋁

非售品
CAS:1344-28-1
分子式:Al2O3
分子量:

β-氧化鋁
英文: β-alumina
CAS號:  1344-28-1
分子式:  Al2O3
相關信息:
并非氧化鋁的異構體,而是一種鋁酸鹽。通式為M2O·xAl2O3,M為一價陽離子,也可被二價或三價陽離子置換。其中鈉β-氧化鋁離子電導率最高,是非化學計量化合物,有兩種變體:β和β′′,理想計量式分別為Na2O·11Al2O3和Na2O·5.33Al2O3。β-氧化鋁屬六方晶系,是層狀結構,單位晶胞含兩個鋁氧尖晶石基塊;β′′-氧化鋁屬三方晶系,也是層狀結構,單位晶胞含三個尖晶石基塊。β′′-氧化鋁比β-氧化鋁具有更高的鈉離子導電率,300℃時達10-1S·cm-1,已成功地用作鈉/硫蓄電池的隔膜材料。

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