cation vacancy meaning in English

阳离子空位

Xps measurement results exhibited that no detectable fe2 + existed in the compound of a ~ fe2os doped with sn4 + , which suggest that oxygen anions or cation vacancies not only can compensate the charge balance but also significantly enhance the gas - sensitivity of a - fe2o3 based gas sensors . ( 3 ) conductive type of a - fe2o3 doped with sn4 + is showed in the n - type by hall measurement and gas - sensitivity measurement . the results of measurements and characterizations suggest that the sensitive mechanism of the a - fe2o3 based nano - materials prepared by this work be the surface resistance controlled mode
( 3 )首次进行了霍尔测量，并结合气敏测试结果，从不同方面证实了掺锡- fe _ 2o _ 3纳米半导体的导电类型是n型；综合粉体的电导率?温度曲线、元件的电阻?加热电流特征曲线、元件在不同气氛下的电阻特性以及比表面积等测试表征结果，得出本文所制成的- fe _ 2o _ 3基气敏元件的气敏机理特征属于表面控制型。