Synthesis and microwave electromagnetic property of LaMnO3 nanocrystalline

摘要：

The perovskite-type nanocrystal LaMnO3 was prepared using a sol-gel auto-combustion method with citric acid as the chelating agent. The metal ions coordination compound, obtained from nitrate and citrate, underwent an auto-combustion process and voluminous ashes formed when calcining the complex in the air. Some analytical methods consisted of FT-IR, XRD and wave-guide were used to characterize the gel and the final products. It was shown that metal ions and carboxyl were combined to form a homogeneous organic complex base salts in the process of gelation. The nanocrystalline had dielectric loss in the microwave frequency range of measurement. With the increasing of thickness, the reflectivity of perovskite-type nanocrystalline increased and absorption peak shifted to lower frequencies. The size of the nanocrystalline affected electromagnetic absorption.

关键词： LaMnO3 nanocrystalline sol-gel auto-combustion microwave electromagnetic property

作者: 孙杰 谭永

作者单位: 沈阳理工大学环境与化工学院,沈阳,100168 东北大学材料与冶金学院,沈阳,110004

会议类型: 国际会议

会议名称: 第六届中国国际纳米科技研讨会

会议地点: 成都

会议语种:英文

在线出版日期: 2007-11-19（万方平台首次上网日期，不代表论文的发表时间）