Defect and electrical properties of nanocrystalline tungsten trioxide

• 来源期刊: 中国物理（英文版）
• 关键词: nanocrystalline tungsten trioxide electrical properties
• 年，卷（期）: 2004,（9）
• 页码范围: 1516-1519
• 页数: 4页
• 语种: 英文

摘要

Nanocrystalline tungsten trioxide particles were prepared by a wet-chemical method. Transmission electron microscope (TEM) analysis shows that the average grain size is about 15nm. The oxygen deficiency of nanometre-sized sample is higher than that of ordinary tungsten trioxide. The electric conductivity increases because of high oxygen deficiency. Ironic relaxation polarization and crystallographic shear (CS) planes theory were used to explain the unusual dielectric characteristic of nanocrystalline tungsten trioxide.