STUDY ON THE NON-STIOCHIOMETRIC SNO2-X NANOCRYSTALLINE MATERIAL BY XRD, XPS AND

2020-03-26 14:51:56

ESR hours sintered XRD degrees

责任者: LI, QA;ZENG, GF;ZHAN, RY;XI, SQ 单位: 来源出处: ACTA CHIMICA SINICA, v 53 1995, p 381- 385 摘要: Nonstiochiometric SnO2-x nanocrystalline material were successfully prepared through Sol-Gel process using anhydrous stannic chloride and iso-propyl alcohol. TEM observation shows that the mean diameter of the powder sintered at 700 degrees C for 2 hours is about 20 nm. By the investigation of XRD and ESR, we can conclude that the sample sintered at 300 degrees C for 2 hours was amorphous and it grew into nanocrystalline with the oxygen vacancies and defects when sintered at 700 degrees C for 2 hours. Using these conclusion, the ESR signals and the difference between the two SnO2-x samples are explained. 关键词: NANOPHASE; FERROELECTRICS; PHASE TRANSITION; ELECTRON