Higher d.c. resistivity of Li�?�Zn�?�Cd ferrites prepared by microwave sintering compared with conventional sintering

Bulletin of materials science

Mamata Maisnam¹  Sumitra Phanjoubam¹ 

[1] Department of Physics, Manipur University, Canchipur, Imphal 795 003, India$$Department of Physics, Manipur University, Canchipur, Imphal 795 003, IndiaDepartment of Physics, Manipur University, Canchipur, Imphal 795 003, India$$

关键词: Ceramics;    lithium ferrites;    spinel structure;    microwave sintering;    d.c. resistivity;    activation energy.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Cd²⁺-substituted Liâ€�?�Zn ferrites having the general formula Li$^{+}_{0.4â€�?�x/2}$Zn$^{2+}_{0.2}$Cd$^{2+}_{x}$Fe$^{3+}_{2.4â€�?�x/2}$O$^{2-}_{4}$ where x = 0.02, 0.03 and 0.04 have been prepared by both microwave sintering and conventional sintering. In the former case, sintering was done at 1050 °C for 25 min, whereas in the latter case sintering was done at 1050 °C for 6 h. The various structural properties, microstructures and d.c. resistivity of the samples prepared by the two techniques were compared. The study showed higher d.c. resistivity and higher activation energies in the samples prepared by microwave sintering. The mechanisms pertaining to the results are discussed.

【 授权许可】

Unknown